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David Walker

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Bruno S Milagres; Carlos E Montandon; Richard Pacheco; Amanda F Padilha; David H Walker; Renata N Freitas; Marcelo B Labruna; Claudio Mafra; Márcio A M Galvão
Spotted Fever group rickettsia in small rodents from areas of low endemicity for brazilian spotted Fever in the eastern region of minas gerais state, Brazil.
Slobodan Paessler; David H Walker
Pathogenesis of the viral hemorrhagic fevers.
Nadezhda E Yun; David H Walker
Pathogenesis of Lassa fever.

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2013: Bruno S Milagres; Carlos E Montandon; Richard Pacheco; Amanda F Padilha; David H Walker; Renata N Freitas; Marcelo B Labruna; Claudio Mafra; Márcio A M Galvão
Spotted Fever group rickettsia in small rodents from areas of low endemicity for brazilian spotted Fever in the eastern region of minas gerais state, Brazil.
The American journal of tropical medicine and hygiene 2013;88(5):937-9.
2013: Slobodan Paessler; David H Walker
Pathogenesis of the viral hemorrhagic fevers.
Annual review of pathology 2013;8():411-40.
2012: Nadezhda E Yun; David H Walker
Pathogenesis of Lassa fever.
Viruses 2012;4(10):2031-48.
2012: Rong Fang; Nahed Ismail; David H Walker
Contribution of NK cells to the innate phase of host protection against an intracellular bacterium targeting systemic endothelium.
The American journal of pathology 2012;181(1):185-95.
2012: Gustavo Valbuena; David H Walker
Approaches to vaccines against Orientia tsutsugamushi.
Frontiers in cellular and infection microbiology 2012;2():170.
2012: Lijun Xin; Rong Fang; Bin Gong; Nicole L Mendell; Thomas R Shelite; Lynn Soong; David H Walker
Systemic treatment with CpG-B after sublethal rickettsial infection induces mouse death through indoleamine 2,3-dioxygenase (IDO).
PloS one 2012;7(3):e34062.
2012: Pasquale Mansueto; Ilenia Pepe; Giovam Battista Rini; Aurelio Seidita; Giustina Vitale; Antonio Carroccio; Antonio Cascio; Enrico Cillari; Salvatore Di Rosa; David H Walker
New insight into immunity and immunopathology of Rickettsial diseases.
Clinical & developmental immunology 2012;2012():967852.
2011: Patricia A Crocquet-Valdes; Nahed Ismail; Colette A Pietzsch; Tais B Saito; Heather L Stevenson; Nagaraja R Thirumalapura; Sunil Thomas; Xuejie Yu; David H Walker
Immunization with Ehrlichia P28 outer membrane proteins confers protection in a mouse model of ehrlichiosis.
Clinical and vaccine immunology : CVI 2011;18(12):2018-25.
2011: Yan Liu; Zhikai Zhang; Yongquan Jiang; Lihong Zhang; Vsevolod L Popov; Jianzhi Zhang; David H Walker; Xue-Jie Yu
Obligate intracellular bacterium Ehrlichia inhibiting mitochondrial activity.
Microbes and infection / Institut Pasteur 2011;13(3):232-8.
2011: Sunil Thomas; Patricia A Crocquet-Valdes; Bruce A Luxon; Nagaraja R Thirumalapura; David H Walker
Structure-based vaccines provide protection in a mouse model of ehrlichiosis.
PloS one 2011;6(11):e27981.
2011: Juan P Olano; David H Walker
Diagnosing emerging and reemerging infectious diseases: the pivotal role of the pathologist.
Archives of pathology & laboratory medicine 2011;135(1):83-91.
2010: Karla A Oliveira; Adriano Pinter; Aaron Medina-Sanchez; Venkata D Boppana; Stephen K Wikel; Tais B Saito; Thomas Shelite; Lucas Blanton; Vsevolod Popov; Pete D Teel; David H Walker; Marcio A M Galvao; Claudio Mafra; Donald H Bouyer
Amblyomma imitator ticks as vectors of Rickettsia rickettsii, Mexico.
Emerging infectious diseases 2010;16(8):1282-4.
2010: Shouyin Zhang; Hongbin Song; Yan Liu; Qun Li; Yong Wang; Jiabin Wu; Junfeng Wan; Guolan Li; Changjun Yu; Xiuyong Li; Wenwu Yin; Zhen Xu; Bo Liu; Qian Zhang; Kanglin Wan; Guichang Li; Xiuping Fu; Jingshan Zhang; Jinrong He; Rong Hai; Dongzheng Yu; David H Walker; Jianguo Xu; Xue-Jie Yu
Scrub typhus in previously unrecognized areas of endemicity in China.
Journal of clinical microbiology 2010;48(4):1241-4.
2010: Sunil Thomas; Vsevolod L Popov; David H Walker
Exit mechanisms of the intracellular bacterium Ehrlichia.
PloS one 2010;5(12):e15775.
2009: Lucy M Ndip; M Labruna; Roland N Ndip; David H Walker; Jere W McBride
Molecular and clinical evidence of Ehrlichia chaffeensis infection in Cameroonian patients with undifferentiated febrile illness.
Annals of tropical medicine and parasitology 2009;103(8):719-25.
2009: Gustavo Valbuena; David H Walker
Infection of the endothelium by members of the order Rickettsiales.
Thrombosis and haemostasis 2009;102(6):1071-9.
2009: D C H Pena; Claudio Mafra; Simone Berger Calic; Marcelo B Labruna; B S Milagres; David H Walker; Márcio A M Galvão
Serologic survey for antibodies to Rickettsia among domestic and wild animal populations in Brazil.
Clinical microbiology and infection : the official publication of the European Society of Clinical Microbiology and Infectious Diseases 2009;15 Suppl 2():243-4.
2009: Rong Fang; Nahed Ismail; Thomas Shelite; David H Walker
CD4+ CD25+ Foxp3- T-regulatory cells produce both gamma interferon and interleukin-10 during acute severe murine spotted fever rickettsiosis.
Infection and immunity 2009;77(9):3838-49.
2009: Xue-Jie Yu; David H Walker; Yan Liu; Lihong Zhang
Amino acid biosynthesis deficiency in bacteria associated with human and animal hosts.
Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases 2009;9(4):514-7.
2009: S Thomas; N Thirumalapura; E C Crossley; Nahed Ismail; David H Walker
Antigenic protein modifications in Ehrlichia.
Parasite immunology 2009;31(6):296-303.
2009: Jeffrey M Jordan; Michael E Woods; Lynn Soong; David H Walker
Rickettsiae stimulate dendritic cells through toll-like receptor 4, leading to enhanced NK cell activation in vivo.
The Journal of infectious diseases 2009;199(2):236-42.
2008: Jorge E Zavala-Castro; Karla R Dzul-Rosado; Juan José Arias León; David H Walker; Jorge E Zavala-Velázquez
An increase in human cases of spotted fever rickettsiosis in Yucatan, Mexico, involving children.
The American journal of tropical medicine and hygiene 2008;79(6):907-10.
2008: Jorge E Zavala-Castro; Karla R Dzul-Rosado; Juan José Arias León; David H Walker; Jorge E Zavala-Velázquez
Short report: Rickettsia felis outer membrane protein A: a potential tool for diagnosis of patients with flea-borne spotted fever.
The American journal of tropical medicine and hygiene 2008;79(6):903-6.
2008: David H Walker; Christopher D Paddock; John Dumler
Emerging and re-emerging tick-transmitted rickettsial and ehrlichial infections.
The Medical clinics of North America 2008;92(6):1345-61, x.
2008: Yong Zhu; Aaron Medina-Sanchez; Donald H Bouyer; David H Walker; Xue-Jie Yu
Genotyping Rickettsia prowazekii isolates.
Emerging infectious diseases 2008;14(8):1300-2.
2008: Jeffrey M Jordan; Michael E Woods; Juan P Olano; David H Walker
The absence of Toll-like receptor 4 signaling in C3H/HeJ mice predisposes them to overwhelming rickettsial infection and decreased protective Th1 responses.
Infection and immunity 2008;76(8):3717-24.
2008: David H Walker; Nahed Ismail
Emerging and re-emerging rickettsioses: endothelial cell infection and early disease events.
Nature reviews. Microbiology 2008;6(5):375-86.
2008: Jianli Dong; Juan P Olano; Jere W McBride; David H Walker
Emerging pathogens: challenges and successes of molecular diagnostics.
The Journal of molecular diagnostics : JMD 2008;10(3):185-97.
2008: Nagaraja R Thirumalapura; Heather L Stevenson; David H Walker; Nahed Ismail
Protective heterologous immunity against fatal ehrlichiosis and lack of protection following homologous challenge.
Infection and immunity 2008;76(5):1920-30.
2008: Heather L Stevenson; E C Crossley; N Thirumalapura; David H Walker; Nahed Ismail
Regulatory roles of CD1d-restricted NKT cells in the induction of toxic shock-like syndrome in an animal model of fatal ehrlichiosis.
Infection and immunity 2008;76(4):1434-44.
2007: Nahed Ismail; Emily C Crossley; Heather L Stevenson; David H Walker
Relative importance of T-cell subsets in monocytotropic ehrlichiosis: a novel effector mechanism involved in Ehrlichia-induced immunopathology in murine ehrlichiosis.
Infection and immunity 2007;75(9):4608-20.
2007: Jeffrey M Jordan; Michael E Woods; Hui-Min Feng; Lynn Soong; David H Walker
Rickettsiae-stimulated dendritic cells mediate protection against lethal rickettsial challenge in an animal model of spotted fever rickettsiosis.
The Journal of infectious diseases 2007;196(4):629-38.
2007: David H Walker
Rickettsiae and rickettsial infections: the current state of knowledge.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 2007;45 Suppl 1():S39-44.
2007: Rong Fang; Nahed Ismail; Lynn Soong; Vsevolod L Popov; Ted Whitworth; Donald H Bouyer; David H Walker
Differential interaction of dendritic cells with Rickettsia conorii: impact on host susceptibility to murine spotted fever rickettsiosis.
Infection and immunity 2007;75(6):3112-23.
2007: Jian-zhi Zhang; Vsevolod L Popov; Si Gao; David H Walker; Xue-Jie Yu
The developmental cycle of Ehrlichia chaffeensis in vertebrate cells.
Cellular microbiology 2007;9(3):610-8.
2007: Xue-Jie Yu; Jere W McBride; David H Walker
Restriction and expansion of Ehrlichia strain diversity.
Veterinary parasitology 2007;143(3-4):337-46.
2007: Ana Maria Cárdenas; C Kuyler Doyle; Xiaofeng Zhang; Kimberly A Nethery; Richard E Corstvet; David H Walker; Jere W McBride
Enzyme-linked immunosorbent assay with conserved immunoreactive glycoproteins gp36 and gp19 has enhanced sensitivity and provides species-specific immunodiagnosis of Ehrlichia canis infection.
Clinical and vaccine immunology : CVI 2007;14(2):123-8.
2007: Marcelo B Labruna; Jere W McBride; Luis Marcelo A Camargo; Daniel M Aguiar; Michael Yabsley; William R Davidson; Ellen Stromdahl; Phillip C Williamson; Roger W Stich; S Wesley Long; Erney Camargo; David H Walker
A preliminary investigation of Ehrlichia species in ticks, humans, dogs, and capybaras from Brazil.
Veterinary parasitology 2007;143(2):189-95.
2007: Vsevolod L Popov; Edward I Korenberg; Valentina V Nefedova; Violet C Han; Julie W Wen; Yurii V Kovalevskii; Natalia B Gorelova; David H Walker
Ultrastructural evidence of the ehrlichial developmental cycle in naturally infected Ixodes persulcatus ticks in the course of coinfection with Rickettsia, Borrelia, and a flavivirus.
Vector borne and zoonotic diseases (Larchmont, N.Y.) 2007;7(4):699-716.
2007: Lucy M Ndip; Roland N Ndip; Veronica E Ndive; Jane A Awuh; David H Walker; Jere W McBride
Ehrlichia species in Rhipicephalus sanguineus ticks in Cameroon.
Vector borne and zoonotic diseases (Larchmont, N.Y.) 2007;7(2):221-7.
2006: Márcio A M Galvão; L D Cardoso; Claudio Mafra; Simone Berger Calic; David H Walker
Revisiting brazilian spotted fever focus of Caratinga, Minas Gerais State, Brazil.
Annals of the New York Academy of Sciences 2006;1078():255-6.
2006: Márcio A M Galvão; J E Zavala-Velazquez; J E Zavala-Castro; Claudio Mafra; Simone Berger Calic; David H Walker
Rickettsia felis in the Americas.
Annals of the New York Academy of Sciences 2006;1078():156-8.
2006: Heather L Stevenson; Jeffrey M Jordan; Ziad Peerwani; Hui-Qun Wang; David H Walker; Nahed Ismail
An intradermal environment promotes a protective type-1 response against lethal systemic monocytotropic ehrlichial infection.
Infection and immunity 2006;74(8):4856-64.
2006: Konstantinos Mavromatis; C Kuyler Doyle; Athanasios Lykidis; Natalia Ivanova; M P Francino; Patrick S G Chain; M Shin; Stephanie Malfatti; Frank W Larimer; Alex Copeland; John C Detter; Miriam Land; Paul M Richardson; Xue-Jie Yu; David H Walker; Jere W McBride; Nikos Kyrpides
The genome of the obligately intracellular bacterium Ehrlichia canis reveals themes of complex membrane structure and immune evasion strategies.
Journal of bacteriology 2006;188(11):4015-23.
2006: Jorge E Zavala-Castro; Jorge E Zavala-Velázquez; David H Walker; Edgar E Ruiz Arcila; Hugo Laviada-Molina; Juan P Olano; José A Ruiz-Sosa; Melissa A Small; Karla R Dzul-Rosado
Fatal human infection with Rickettsia rickettsii, Yucatán, Mexico.
Emerging infectious diseases 2006;12(4):672-4.
2006: Jorge Zavala-Velazquez; Hugo Laviada-Molina; Jorge E Zavala-Castro; Carlos Perez-Osorio; Gerardo Becerra-Carmona; Jose A Ruiz-Sosa; Donald H Bouyer; David H Walker
Rickettsia felis, the agent of an emerging infectious disease: Report of a new case in Mexico.
Archives of medical research 2006;37(3):419-22.
2006: Alice S Chapman; Johan S Bakken; Scott M Folk; Christopher D Paddock; Karen C Bloch; Allan Krusell; Daniel J Sexton; Steven C Buckingham; Gary S Marshall; Gregory A Storch; Gregory A Dasch; Jennifer H McQuiston; David L Swerdlow; John Dumler; William L Nicholson; David H Walker; Marina E Eremeeva; Christopher A Ohl
Diagnosis and management of tickborne rickettsial diseases: Rocky Mountain spotted fever, ehrlichioses, and anaplasmosis--United States: a practical guide for physicians and other health-care and public health professionals.
MMWR. Recommendations and reports : Morbidity and mortality weekly report. Recommendations and reports / Centers for Disease Control 2006;55(RR-4):1-27.
2006: David H Walker
Targeting rickettsia.
The New England journal of medicine 2006;354(13):1418-20.
2006: Jian-Zhi Zhang; Jun-Fang Hao; David H Walker; Xue-Jie Yu
A mutation inactivating the methyltransferase gene in avirulent Madrid E strain of Rickettsia prowazekii reverted to wild type in the virulent revertant strain Evir.
Vaccine 2006;24(13):2317-23.
2006: Luciane Daniele Cardoso; Renata Nascimento Freitas; Claudio Mafra; Cristiane Vilas Boas Neves; Fátima Cristina Bacellar Figueira; Marcelo B Labruna; Solange M Gennari; David H Walker; Márcio A M Galvão
[Characterization of Rickettsia spp. circulating in a silent peri-urban focus for Brazilian spotted fever in Caratinga, Minas Gerais, Brazil].
Cadernos de saúde pública 2006;22(3):495-501.
2006: Nahed Ismail; Heather L Stevenson; David H Walker
Role of tumor necrosis factor alpha (TNF-alpha) and interleukin-10 in the pathogenesis of severe murine monocytotropic ehrlichiosis: increased resistance of TNF receptor p55- and p75-deficient mice to fatal ehrlichial infection.
Infection and immunity 2006;74(3):1846-56.
2005: Patricia A Crocquet-Valdes; Jere W McBride; Hui-Min Feng; Nahed Ismail; Melissa A Small; Xue-Jie Yu; David H Walker
Analysis of ehrlichial p28 gene expression in a murine model of persistent infection.
Annals of the New York Academy of Sciences 2005;1063():420-4.
2005: S Wesley Long; Ted Whitworth; David H Walker; Xue-Jie Yu
Overcoming barriers to the transformation of the genus Ehrlichia.
Annals of the New York Academy of Sciences 2005;1063():403-10.
2005: Nahed Ismail; David H Walker
Balancing protective immunity and immunopathology: a unifying model of monocytotropic ehrlichiosis.
Annals of the New York Academy of Sciences 2005;1063():383-94.
2005: Aaron Medina-Sanchez; Donald H Bouyer; Virginia Alcantara-Rodriguez; Claudio Mafra; Jorge E Zavala-Castro; Ted Whitworth; Vsevolod L Popov; Ildefonso Fernandez-Salas; David H Walker
Detection of a typhus group Rickettsia in Amblyomma ticks in the state of Nuevo Leon, Mexico.
Annals of the New York Academy of Sciences 2005;1063():327-32.
2005: David H Walker; Xue-Jie Yu
Progress in rickettsial genome analysis from pioneering of Rickettsia prowazekii to the recent Rickettsia typhi.
Annals of the New York Academy of Sciences 2005;1063():13-25.
2005: Elizângela Guedes; Romário C Leite; Márcia C A Prata; Richard C Pacheco; David H Walker; Marcelo B Labruna
Detection of Rickettsia rickettsii in the tick Amblyomma cajennense in a new Brazilian spotted fever-endemic area in the state of Minas Gerais.
Memórias do Instituto Oswaldo Cruz 2005;100(8):841-5.
2005: Lucy M Ndip; Roland N Ndip; S N Esemu; V L Dickmu; Eric B Fokam; David H Walker; Jere W McBride
Ehrlichial infection in Cameroonian canines by Ehrlichia canis and Ehrlichia ewingii.
Veterinary microbiology 2005;111(1-2):59-66.
2005: C Kuyler Doyle; Marcelo B Labruna; Edward B Breitschwerdt; Yi-Wei Tang; Richard E Corstvet; Barbara C Hegarty; Karen C Bloch; Ping Li; David H Walker; Jere W McBride
Detection of medically important Ehrlichia by quantitative multicolor TaqMan real-time polymerase chain reaction of the dsb gene.
The Journal of molecular diagnostics : JMD 2005;7(4):504-10.
2005: Jorge E Zavala-Castro; Melissa Small; Colette Keng; Donald H Bouyer; Jorge E Zavala-Velázquez; David H Walker
Transcription of the Rickettsia felis ompA gene in naturally infected fleas.
The American journal of tropical medicine and hygiene 2005;73(4):662-6.
2005: Ted Whitworth; Vsevolod L Popov; Xue-Jie Yu; David H Walker; Donald H Bouyer
Expression of the Rickettsia prowazekii pld or tlyC gene in Salmonella enterica serovar Typhimurium mediates phagosomal escape.
Infection and immunity 2005;73(10):6668-73.
2005: Heather L Stevenson; Marcelo B Labruna; John A Montenieri; Michael Y Kosoy; Kenneth Gage; David H Walker
Detection of Rickettsia felis in a New World flea species, Anomiopsyllus nudata (Siphonaptera: Ctenophthalmidae).
Journal of medical entomology 2005;42(2):163-7.
2005: Syeling Lai; David H Walker; M Tarek Elghetany
Catastrophic antiphospholipid syndrome: a rare cause of disseminated microvascular thrombotic injury - a case report with pathological and molecular correlative studies.
Pathology international 2005;55(3):144-9.
2005: Marcelo B Labruna; Luis Marcelo A Camargo; Erney Camargo; David H Walker
Detection of a spotted fever group Rickettsia in the tick Haemaphysalis juxtakochi in Rondonia, Brazil.
Veterinary parasitology 2005;127(2):169-74.
2005: David H Walker
Ehrlichia under our noses and no one notices.
Archives of virology. Supplementum 2005;(19):147-56.
2005: Gustavo Valbuena; David H Walker
Expression of CX3CL1 (fractalkine) in mice with endothelial-target rickettsial infection of the spotted-fever group.
Virchows Archiv : an international journal of pathology 2005;446(1):21-7.
2004: Marcelo B Labruna; Ted Whitworth; Donald H Bouyer; Jere McBride; Luis Marcelo A Camargo; Erney Camargo; Vsevolod Popov; David H Walker
Rickettsia bellii and Rickettsia amblyommii in Amblyomma ticks from the State of Rondônia, Western Amazon, Brazil.
Journal of medical entomology 2004;41(6):1073-81.
2004: Gustavo Valbuena; David H Walker
Effect of blocking the CXCL9/10-CXCR3 chemokine system in the outcome of endothelial-target rickettsial infections.
The American journal of tropical medicine and hygiene 2004;71(4):393-9.
2004: Gustavo Valbuena; Jeffrey M Jordan; David H Walker
T cells mediate cross-protective immunity between spotted fever group rickettsiae and typhus group rickettsiae.
The Journal of infectious diseases 2004;190(7):1221-7.
2004: Lucy M Ndip; Eric B Fokam; Donald H Bouyer; Roland N Ndip; Vincent P K Titanji; David H Walker; Jere W McBride
Detection of Rickettsia africae in patients and ticks along the coastal region of Cameroon.
The American journal of tropical medicine and hygiene 2004;71(3):363-6.
2004: Juan P Olano; Gary Wen; Hui-Min Feng; Jere W McBride; David H Walker
Histologic, serologic, and molecular analysis of persistent ehrlichiosis in a murine model.
The American journal of pathology 2004;165(3):997-1006.
2004: Maurício C Horta; Marcelo B Labruna; Luis A Sangioni; Manoella C B Vianna; Solange M Gennari; Márcio A M Galvão; Claudio Mafra; Odilon Vidotto; Teresinha T S Schumaker; David H Walker
Prevalence of antibodies to spotted fever group rickettsiae in humans and domestic animals in a Brazilian spotted fever-endemic area in the state of São Paulo, Brazil: serologic evidence for infection by Rickettsia rickettsii and another spotted fever group Rickettsia.
The American journal of tropical medicine and hygiene 2004;71(1):93-7.
2004: Simone Berger Calic; Márcio A M Galvão; Fátima Bacellar; Christiane M B M Rocha; Claudio Mafra; Romário C Leite; David H Walker
Human ehrlichioses in Brazil: first suspect cases.
The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious Diseases 2004;8(3):259-62.
2004: Hui-Min Feng; Ted Whitworth; Vsevolod Popov; David H Walker
Effect of antibody on the rickettsia-host cell interaction.
Infection and immunity 2004;72(6):3524-30.
2004: Márcio A M Galvão; Claudio Mafra; Chequer Buffe Chamone; Simone Berger Calic; Jorge E Zavala-Velazquez; David H Walker
Clinical and laboratorial evidence of Rickettsia felis infections in Latin America.
Revista da Sociedade Brasileira de Medicina Tropical 2004;37(3):238-40.
2004: Marcelo B Labruna; Jere W McBride; Donald H Bouyer; Luis Marcelo A Camargo; Erney Camargo; David H Walker
Molecular evidence for a spotted fever group Rickettsia species in the tick Amblyomma longirostre in Brazil.
Journal of medical entomology 2004;41(3):533-7.
2004: Hui-Min Feng; Ted Whitworth; Juan P Olano; Vsevolod L Popov; David H Walker
Fc-dependent polyclonal antibodies and antibodies to outer membrane proteins A and B, but not to lipopolysaccharide, protect SCID mice against fatal Rickettsia conorii infection.
Infection and immunity 2004;72(4):2222-8.
2004: Lucy M Ndip; Donald H Bouyer; Amelia P A Travassos da Rosa; Vincent P K Titanji; Robert B Tesh; David H Walker
Acute spotted fever rickettsiosis among febrile patients, Cameroon.
Emerging infectious diseases 2004;10(3):432-7.
2004: David H Walker
Ricketts creates rickettsiology, the study of vector-borne obligately intracellular bacteria.
The Journal of infectious diseases 2004;189(5):938-55.
2004: Hui-Min Feng; David H Walker
Mechanisms of immunity to Ehrlichia muris: a model of monocytotropic ehrlichiosis.
Infection and immunity 2004;72(2):966-71.
2004: Nahed Ismail; Lynn Soong; Jere W McBride; Gustavo Valbuena; Juan P Olano; Hui-Min Feng; David H Walker
Overproduction of TNF-alpha by CD8+ type 1 cells and down-regulation of IFN-gamma production by CD4+ Th1 cells contribute to toxic shock-like syndrome in an animal model of fatal monocytotropic ehrlichiosis.
Journal of immunology (Baltimore, Md. : 1950) 2004;172(3):1786-800.
2004: David H Walker; Nahed Ismail; Juan P Olano; Jere W McBride; Xue-Jie Yu; Hui-Min Feng
Ehrlichia chaffeensis: a prevalent, life-threatening, emerging pathogen.
Transactions of the American Clinical and Climatological Association 2004;115():375-82; discussion 382-4.
2004: Marcelo B Labruna; Ted Whitworth; Maurício C Horta; Donald H Bouyer; Jere W McBride; Adriano Pinter; Vsevolod Popov; Solange M Gennari; David H Walker
Rickettsia species infecting Amblyomma cooperi ticks from an area in the state of São Paulo, Brazil, where Brazilian spotted fever is endemic.
Journal of clinical microbiology 2004;42(1):90-8.
2003: Juan P Olano; Edwin Masters; Wayne Hogrefe; David H Walker
Human monocytotropic ehrlichiosis, Missouri.
Emerging infectious diseases 2003;9(12):1579-86.
2003: David H Walker
Fatal cardiac failure in a 7-month-old child.
Pediatric and developmental pathology : the official journal of the Society for Pediatric Pathology and the Paediatric Pathology Society 2003;6(6):582-4.
2003: Márcio Antonio Moreira Galvâo; John Dumler; Claudio Mafra; Simone Berger Calic; Chequer Buffe Chamone; Gracco Cesarino Filho; Juan Pablo Olano; David H Walker
Fatal spotted fever rickettsiosis, Minas Gerais, Brazil.
Emerging infectious diseases 2003;9(11):1402-5.
2003: Gustavo Valbuena; William Bradford; David H Walker
Expression analysis of the T-cell-targeting chemokines CXCL9 and CXCL10 in mice and humans with endothelial infections caused by rickettsiae of the spotted fever group.
The American journal of pathology 2003;163(4):1357-69.
2003: Hui-Min Feng; David H Walker
Cross-protection between distantly related spotted fever group rickettsiae.
Vaccine 2003;21(25-26):3901-5.
2003: John Stenos; Stephen Graves; Vsevolod L Popov; David H Walker
Aponomma hydrosauri, the reptile-associated tick reservoir of Rickettsia honei on Flinders Island, Australia.
The American journal of tropical medicine and hygiene 2003;69(3):314-7.
2003: Juan P Olano; Wayne Hogrefe; Brent Seaton; David H Walker
Clinical manifestations, epidemiology, and laboratory diagnosis of human monocytotropic ehrlichiosis in a commercial laboratory setting.
Clinical and diagnostic laboratory immunology 2003;10(5):891-6.
2003: Márcio A M Galvão; Simone Berger Calic; Chequer Buffe Chamone; Cláudio Lísias Mafra S; Gracco Cesarino Filho; Juan Pablo Olano; David H Walker
Spotted fever rickettsiosis in Coronel Fabriciano, Minas Gerais State.
Revista da Sociedade Brasileira de Medicina Tropical 2003;36(4):479-81.
2003: Zhen Li; C Marcela Díaz-Montero; Gustavo Valbuena; Xue-Jie Yu; Juan P Olano; Hui-Min Feng; David H Walker
Identification of CD8 T-lymphocyte epitopes in OmpB of Rickettsia conorii.
Infection and immunity 2003;71(7):3920-6.
2003: David H Walker
Principles of the malicious use of infectious agents to create terror: reasons for concern for organisms of the genus Rickettsia.
Annals of the New York Academy of Sciences 2003;990():739-42.
2003: Patricia A Crocquet-Valdes; Jere W McBride; Xue-Jie Yu; David H Walker
Molecular characterization of the 28 kDa multigene locus of Ehrlichia muris.
Annals of the New York Academy of Sciences 2003;990():714-6.
2003: Jere W McBride; Jason E Comer; David H Walker
Novel Immunoreactive glycoprotein orthologs of Ehrlichia spp.
Annals of the New York Academy of Sciences 2003;990():678-84.
2003: Márcio A M Galvão; Claudio Mafra; Cecilia Moron; Elizabeth Anaya; David H Walker
Rickettsiosis of the genus Rickettsia in South America.
Annals of the New York Academy of Sciences 2003;990():57-61.
2003: David H Walker; Gustavo Valbuena; Juan P Olano
Pathogenic mechanisms of diseases caused by Rickettsia.
Annals of the New York Academy of Sciences 2003;990():1-11.
2003: Jere W McBride; Richard E Corstvet; Stephen Gaunt; Charles M Boudreaux; Thaya Guedry; David H Walker
Kinetics of antibody response to Ehrlichia canis immunoreactive proteins.
Infection and immunity 2003;71(5):2516-24.
2003: David H Walker
Rickettsial diseases in travelers.
Travel medicine and infectious disease 2003;1(1):35-40.
2002: Márcio A M Galvão; Joel A Lamounier; Elido Bonomo; Margarete S Tropia; Eliane G Rezende; Simone Berger Calic; Chequer Buffe Chamone; Mirtes C Machado; Márcia E A Otoni; Romário C Leite; Camila Caram; Claudio Mafra; David H Walker
[Emerging and reemerging rickettsiosis in an endemic area of Minas Gerais State, Brazil].
Cadernos de saúde pública 2002;18(6):1593-7.
2002: Rashmi N Mueller; Barry F Uretsky; Lei Hao; David H Walker; Gregory E Panomitros; Mark H Zornow
Cardiac arrest on induction of anesthesia due to triple vessel coronary artery disease despite a "Negative" angiogram.
Anesthesiology 2002;97(3):745-9.
2002: Gustavo Valbuena; Hui-Min Feng; David H Walker
Mechanisms of immunity against rickettsiae. New perspectives and opportunities offered by unusual intracellular parasites.
Microbes and infection / Institut Pasteur 2002;4(6):625-33.
2002: Jere W McBride; Lucy M Ndip; Vsevolod L Popov; David H Walker
Identification and functional analysis of an immunoreactive DsbA-like thio-disulfide oxidoreductase of Ehrlichia spp.
Infection and immunity 2002;70(5):2700-3.
2002: S Wesley Long; Xiao-Feng Zhang; Hai Qi; Steven Standaert; David H Walker; Xue-Jie Yu
Antigenic variation of Ehrlichia chaffeensis resulting from differential expression of the 28-kilodalton protein gene family.
Infection and immunity 2002;70(4):1824-31.
2002: Juan P Olano; David H Walker
Human ehrlichioses.
The Medical clinics of North America 2002;86(2):375-92.
2002: Riva P Oliveira; Márcio A M Galvão; Claudio Mafra; Chequer Buffe Chamone; Simone Berger Calic; Sergio U Silva; David H Walker
Rickettsia felis in Ctenocephalides spp. fleas, Brazil.
Emerging infectious diseases 2002;8(3):317-9.
2002: Nahed Ismail; Juan P Olano; Hui-Min Feng; David H Walker
Current status of immune mechanisms of killing of intracellular microorganisms.
FEMS microbiology letters 2002;207(2):111-20.
2002: Jorge E Zavala-Velázquez; Jorge E Zavala-Castro; I Vado-Solís; Jose A Ruiz-Sosa; CG Moron; Donald H Bouyer; David H Walker
Identification of Ctenocephalides felis fleas as a host of Rickettsia felis, the agent of a spotted fever rickettsiosis in Yucatań, Mexico.
Vector borne and zoonotic diseases (Larchmont, N.Y.) 2002;2(2):69-75.
2001: Patricia A Crocquet-Valdes; C Marcela Díaz-Montero; Hui-Min Feng; H Li; Alan D T Barrett; David H Walker
Immunization with a portion of rickettsial outer membrane protein A stimulates protective immunity against spotted fever rickettsiosis.
Vaccine 2001;20(5-6):979-88.
2001: David H Walker; Hui-Min Feng; Vsevolod L Popov
Rickettsial phospholipase A2 as a pathogenic mechanism in a model of cell injury by typhus and spotted fever group rickettsiae.
The American journal of tropical medicine and hygiene 2001;65(6):936-42.
2001: C Marcela Díaz-Montero; Hui-Min Feng; Patricia A Crocquet-Valdes; David H Walker
Identification of protective components of two major outer membrane proteins of spotted fever group Rickettsiae.
The American journal of tropical medicine and hygiene 2001;65(4):371-8.
2001: CG Moron; Vsevolod L Popov; Hui-Min Feng; D Wear; David H Walker
Identification of the target cells of Orientia tsutsugamushi in human cases of scrub typhus.
Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2001;14(8):752-9.
2001: AN Billings; Hui-Min Feng; Juan P Olano; David H Walker
Rickettsial infection in murine models activates an early anti-rickettsial effect mediated by NK cells and associated with production of gamma interferon.
The American journal of tropical medicine and hygiene 2001;65(1):52-6.
2001: Xue-Jie Yu; X F Zhang; Jere W McBride; Y Zhang; David H Walker
Phylogenetic relationships of Anaplasma marginale and 'Ehrlichia platys' to other Ehrlichia species determined by GroEL amino acid sequences.
International journal of systematic and evolutionary microbiology 2001;51(Pt 3):1143-6.
2001: Donald H Bouyer; John Stenos; Patricia A Crocquet-Valdes; CG Moron; Vsevolod L Popov; J E Zavala-Velazquez; L D Foil; D R Stothard; Abdu F Azad; David H Walker
Rickettsia felis: molecular characterization of a new member of the spotted fever group.
International journal of systematic and evolutionary microbiology 2001;51(Pt 2):339-47.
2001: David H Walker; Juan P Olano; Hui-Min Feng
Critical role of cytotoxic T lymphocytes in immune clearance of rickettsial infection.
Infection and immunity 2001;69(3):1841-6.
2001: Karyna Ventura; Hal Hawkins; M B Smith; David H Walker
Fatal neonatal echovirus 6 infection: autopsy case report and review of the literature.
Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 2001;14(2):85-90.
2001: E A Sotomayor; Vsevolod L Popov; Hui-Min Feng; David H Walker; Juan P Olano
Animal model of fatal human monocytotropic ehrlichiosis.
The American journal of pathology 2001;158(2):757-69.
2001: Jere W McBride; Richard E Corstvet; Edward B Breitschwerdt; David H Walker
Immunodiagnosis of Ehrlichia canis infection with recombinant proteins.
Journal of clinical microbiology 2001;39(1):315-22.
2000: Hui-Min Feng; David H Walker
Mechanisms of intracellular killing of Rickettsia conorii in infected human endothelial cells, hepatocytes, and macrophages.
Infection and immunity 2000;68(12):6729-36.
2000: Jorge E Zavala-Velázquez; Jose A Ruiz-Sosa; R A Sánchez-Elias; G Becerra-Carmona; David H Walker
Rickettsia felis rickettsiosis in Yucatán.
Lancet 2000;356(9235):1079-80.
2000: John Stenos; David H Walker
The rickettsial outer-membrane protein A and B genes of Rickettsia australis, the most divergent rickettsia of the spotted fever group.
International journal of systematic and evolutionary microbiology 2000;50 Pt 5():1775-9.
2000: David H Walker; Vsevolod L Popov; Hui-Min Feng
Establishment of a novel endothelial target mouse model of a typhus group rickettsiosis: evidence for critical roles for gamma interferon and CD8 T lymphocytes.
Laboratory investigation; a journal of technical methods and pathology 2000;80(9):1361-72.
2000: Jere W McBride; Xue-Jie Yu; David H Walker
A conserved, transcriptionally active p28 multigene locus of Ehrlichia canis.
Gene 2000;254(1-2):245-52.
2000: X Yu; Jere W McBride; X Zhang; David H Walker
Characterization of the complete transcriptionally active ehrlichia chaffeensis 28 kDa outer membrane protein multigene family.
Gene 2000;248(1-2):59-68.
2000: CG Moron; Donald H Bouyer; Xue-Jie Yu; L D Foil; Patricia A Crocquet-Valdes; David H Walker
Phylogenetic analysis of the rompB genes of Rickettsia felis and Rickettsia prowazekii European-human and North American flying-squirrel strains.
The American journal of tropical medicine and hygiene 2000;62(5):598-603.
2000: Vsevolod L Popov; X j Yu; David H Walker
The 120 kDa outer membrane protein of Ehrlichia chaffeensis: preferential expression on dense-core cells and gene expression in Escherichia coli associated with attachment and entry.
Microbial pathogenesis 2000;28(2):71-80.
2000: Xue-Jie Yu; Jere W McBride; C M Diaz; David H Walker
Molecular cloning and characterization of the 120-kilodalton protein gene of Ehrlichia canis and application of the recombinant 120-kilodalton protein for serodiagnosis of canine ehrlichiosis.
Journal of clinical microbiology 2000;38(1):369-74.
2000: Jere W McBride; Xue-Jie Yu; David H Walker
Glycosylation of homologous immunodominant proteins of Ehrlichia chaffeensis and Ehrlichia canis.
Infection and immunity 2000;68(1):13-8.
1999: C F Carpenter; T K Gandhi; LK Kong; G Ralph Corey; S M Chen; David H Walker; John Dumler; Edward B Breitschwerdt; Barbara C Hegarty; Daniel J Sexton
The incidence of ehrlichial and rickettsial infection in patients with unexplained fever and recent history of tick bite in central North Carolina.
The Journal of infectious diseases 1999;180(3):900-3.
1999: M Tarek Elghetany; David H Walker
Hemostatic changes in Rocky Mountain spotted fever and Mediterranean spotted fever.
American journal of clinical pathology 1999;112(2):159-68.
1999: Xue-Jie Yu; Patricia A Crocquet-Valdes; L C Cullman; Vsevolod L Popov; David H Walker
Comparison of Ehrlichia chaffeensis recombinant proteins for serologic diagnosis of human monocytotropic ehrlichiosis.
Journal of clinical microbiology 1999;37(8):2568-75.
1999: David H Walker; S David Hudnall; W K Szaniawski; Hui-Min Feng
Monoclonal antibody-based immunohistochemical diagnosis of rickettsialpox: the macrophage is the principal target.
Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 1999;12(5):529-33.
1999: Jere W McBride; X j Yu; David H Walker
Molecular cloning of the gene for a conserved major immunoreactive 28-kilodalton protein of Ehrlichia canis: a potential serodiagnostic antigen.
Clinical and diagnostic laboratory immunology 1999;6(3):392-9.
1999: Xue-Jie Yu; Jere W McBride; David H Walker
Genetic diversity of the 28-kilodalton outer membrane protein gene in human isolates of Ehrlichia chaffeensis.
Journal of clinical microbiology 1999;37(4):1137-43.
1998: AN Billings; J A Rawlings; David H Walker
Tick-borne diseases in Texas: a 10-year retrospective examination of cases.
Texas medicine 1998;94(12):66-76.
1998: AN Billings; Xue-Jie Yu; P D Teel; David H Walker
Detection of a spotted fever group rickettsia in Amblyomma cajennense (Acari: Ixodidae) in south Texas.
Journal of medical entomology 1998;35(4):474-8.
1998: H Li; David H Walker
rOmpA is a critical protein for the adhesion of Rickettsia rickettsii to host cells.
Microbial pathogenesis 1998;24(5):289-98.
1998: Daniel J Sexton; G Ralph Corey; C Carpenter; L Q Kong; T Gandhi; Edward B Breitschwerdt; Barbara C Hegarty; S M Chen; H M Feng; Xue-Jie Yu; Juan P Olano; David H Walker; John Dumler
Dual infection with Ehrlichia chaffeensis and a spotted fever group rickettsia: a case report.
Emerging infectious diseases 1998;4(2):311-6.
1998: AN Billings; G J Teltow; Scott C Weaver; David H Walker
Molecular characterization of a novel Rickettsia species from Ixodes scapularis in Texas.
Emerging infectious diseases 1998;4(2):305-9.
1998: Vsevolod L Popov; V C Han; SM Chen; John Dumler; Hui-Min Feng; T G Andreadis; R B Tesh; David H Walker
Ultrastructural differentiation of the genogroups in the genus Ehrlichia.
Journal of medical microbiology 1998;47(3):235-51.
1998: David H Walker
Tick-transmitted infectious diseases in the United States.
Annual review of public health 1998;19():237-69.
1997: SM Chen; L C Cullman; David H Walker
Western immunoblotting analysis of the antibody responses of patients with human monocytotropic ehrlichiosis to different strains of Ehrlichia chaffeensis and Ehrlichia canis.
Clinical and diagnostic laboratory immunology 1997;4(6):731-5.
1997: David H Walker
Endothelial-target rickettsial infection.
Laboratory animal science 1997;47(5):483-5.
1997: David H Walker; Hui-Min Feng; S Ladner; AN Billings; Sherif R Zaki; D J Wear; B Hightower
Immunohistochemical diagnosis of typhus rickettsioses using an anti-lipopolysaccharide monoclonal antibody.
Modern pathology : an official journal of the United States and Canadian Academy of Pathology, Inc 1997;10(10):1038-42.
1997: Xue-Jie Yu; David H Walker
Sequence and characterization of an Ehrlichia chaffeensis gene encoding 314 amino acids highly homologous to the NAD A enzyme.
FEMS microbiology letters 1997;154(1):53-8.
1997: David H Walker; John Dumler
Human monocytic and granulocytic ehrlichioses. Discovery and diagnosis of emerging tick-borne infections and the critical role of the pathologist.
Archives of pathology & laboratory medicine 1997;121(8):785-91.
1997: X Yu; J F Piesman; J G Olson; David H Walker
Short report: geographic distribution of different genetic types of Ehrlichia chaffeensis.
The American journal of tropical medicine and hygiene 1997;56(6):679-80.
1997: H Feng; Vsevolod L Popov; G Yuoh; David H Walker
Role of T lymphocyte subsets in immunity to spotted fever group Rickettsiae.
Journal of immunology (Baltimore, Md. : 1950) 1997;158(11):5314-20.
1997: SM Chen; Xue-Jie Yu; Vsevolod L Popov; E L Westerman; F G Hamilton; David H Walker
Genetic and antigenic diversity of Ehrlichia chaffeensis: comparative analysis of a novel human strain from Oklahoma and previously isolated strains.
The Journal of infectious diseases 1997;175(4):856-63.
1997: Xue-Jie Yu; Patricia A Crocquet-Valdes; David H Walker
Cloning and sequencing of the gene for a 120-kDa immunodominant protein of Ehrlichia chaffeensis.
Gene 1997;184(2):149-54.
1997: David H Walker; Vsevolod L Popov; Patricia A Crocquet-Valdes; C J Welsh; Hui-Min Feng
Cytokine-induced, nitric oxide-dependent, intracellular antirickettsial activity of mouse endothelial cells.
Laboratory investigation; a journal of technical methods and pathology 1997;76(1):129-38.
1996: Xue-Jie Yu; Patricia A Crocquet-Valdes; L C Cullman; David H Walker
The recombinant 120-kilodalton protein of Ehrlichia chaffeensis, a potential diagnostic tool.
Journal of clinical microbiology 1996;34(11):2853-5.
1996: Gail L Woods; David H Walker
Detection of infection or infectious agents by use of cytologic and histologic stains.
Clinical microbiology reviews 1996;9(3):382-404.
1996: David H Walker
Human ehrlichiosis: more trouble from ticks.
Hospital practice (1995) 1996;31(4):47-57.
1996: S M Chen; Vsevolod L Popov; Hui-Min Feng; David H Walker
Analysis and ultrastructural localization of Ehrlichia chaffeensis proteins with monoclonal antibodies.
The American journal of tropical medicine and hygiene 1996;54(4):405-12.
1996: David H Walker; A G Barbour; J H Oliver; R S Lane; John Dumler; D T Dennis; D H Persing; Abdu F Azad; E McSweegan
Emerging bacterial zoonotic and vector-borne diseases. Ecological and epidemiological factors.
JAMA : the journal of the American Medical Association 1996;275(6):463-9.
1996: Suzana Radulovic; Hui-Min Feng; M Morovic; B Djelalija; Vsevolod Popov; Patricia A Crocquet-Valdes; David H Walker
Isolation of Rickettsia akari from a patient in a region where Mediterranean spotted fever is endemic.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 1996;22(2):216-20.
1996: David H Walker; John Dumler
Emergence of the ehrlichioses as human health problems.
Emerging infectious diseases 1996;2(1):18-29.
1995: Vsevolod L Popov; S M Chen; Hui-Min Feng; David H Walker
Ultrastructural variation of cultured Ehrlichia chaffeensis.
Journal of medical microbiology 1995;43(6):411-21.
1995: Q H Liu; G Y Chen; Y Jin; M Te; L C Niu; S P Dong; David H Walker
Evidence for a high prevalence of spotted fever group rickettsial infections in diverse ecologic zones of Inner Mongolia.
Epidemiology and infection 1995;115(1):177-83.
1995: David H Walker; Hui-Min Feng; Jamal I Saada; Patricia A Crocquet-Valdes; Suzana Radulovic; Vsevolod L Popov; E Manor
Comparative antigenic analysis of spotted fever group rickettsiae from Israel and other closely related organisms.
The American journal of tropical medicine and hygiene 1995;52(6):569-76.
1995: MG Hove; David H Walker
Persistence of rickettsiae in the partially viable gangrenous margins of amputated extremities 5 to 7 weeks after onset of Rocky Mountain spotted fever.
Archives of pathology & laboratory medicine 1995;119(5):429-31.
1995: David H Walker
Rocky Mountain spotted fever: a seasonal alert.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 1995;20(5):1111-7.
1995: S M Chen; Vsevolod L Popov; Hui-Min Feng; J Wen; David H Walker
Cultivation of Ehrlichia chaffeensis in mouse embryo, Vero, BGM, and L929 cells and study of Ehrlichia-induced cytopathic effect and plaque formation.
Infection and immunity 1995;63(2):647-55.
1994: David H Walker; O Yampolska; L M Grinberg
Death at Sverdlovsk: what have we learned?
The American journal of pathology 1994;144(6):1135-41.
1994: Hui-Min Feng; Vsevolod L Popov; David H Walker
Depletion of gamma interferon and tumor necrosis factor alpha in mice with Rickettsia conorii-infected endothelium: impairment of rickettsicidal nitric oxide production resulting in fatal, overwhelming rickettsial disease.
Infection and immunity 1994;62(5):1952-60.
1994: Patricia A Crocquet-Valdes; K Weiss; David H Walker
Sequence analysis of the 190-kDa antigen-encoding gene of Rickettsia conorii (Malish 7 strain).
Gene 1994;140(1):115-9.
1994: S M Chen; John Dumler; J S Bakken; David H Walker
Identification of a granulocytotropic Ehrlichia species as the etiologic agent of human disease.
Journal of clinical microbiology 1994;32(3):589-95.
1994: Suzana Radulovic; Hui-Min Feng; Patricia A Crocquet-Valdes; M Morovic; B Dzelalija; David H Walker
Antigen-capture enzyme immunoassay: a comparison with other methods for the detection of spotted fever group rickettsiae in ticks.
The American journal of tropical medicine and hygiene 1994;50(3):359-64.
1994: K W Schuenke; David H Walker
Cloning, sequencing, and expression of the gene coding for an antigenic 120-kilodalton protein of Rickettsia conorii.
Infection and immunity 1994;62(3):904-9.
1994: David H Walker; Vsevolod L Popov; J Wen; Hui-Min Feng
Rickettsia conorii infection of C3H/HeN mice. A model of endothelial-target rickettsiosis.
Laboratory investigation; a journal of technical methods and pathology 1994;70(3):358-68.
1994: S M Chen; John Dumler; Hui-Min Feng; David H Walker
Identification of the antigenic constituents of Ehrlichia chaffeensis.
The American journal of tropical medicine and hygiene 1994;50(1):52-8.
1993: John Dumler; W L Sutker; David H Walker
Persistent infection with Ehrlichia chaffeensis.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 1993;17(5):903-5.
1993: Suzana Radulovic; R Speed; Hui-Min Feng; C Taylor; David H Walker
EIA with species-specific monoclonal antibodies: a novel seroepidemiologic tool for determination of the etiologic agent of spotted fever rickettsiosis.
The Journal of infectious diseases 1993;168(5):1292-5.
1993: Hui-Min Feng; David H Walker
Interferon-gamma and tumor necrosis factor-alpha exert their antirickettsial effect via induction of synthesis of nitric oxide.
The American journal of pathology 1993;143(4):1016-23.
1993: Suzana Radulovic; David H Walker; K Weiss; B Dzelalija; M Morovic
Prevalence of antibodies to spotted fever group rickettsiae along the eastern coast of the Adriatic sea.
Journal of clinical microbiology 1993;31(8):2225-7.
1993: Daniel J Sexton; M Muniz; G Ralph Corey; Edward B Breitschwerdt; Barbara C Hegarty; John Dumler; David H Walker; P M Pecanha; Reynaldo Dietze
Brazilian spotted fever in Espirito Santo, Brazil: description of a focus of infection in a new endemic region.
The American journal of tropical medicine and hygiene 1993;49(2):222-6.
1993: Kathryn B Kirkland; Paul Kelly Marcom; Daniel J Sexton; John Dumler; David H Walker
Rocky Mountain spotted fever complicated by gangrene: report of six cases and review.
Clinical infectious diseases : an official publication of the Infectious Diseases Society of America 1993;16(5):629-34.
1993: Hui-Min Feng; J Wen; David H Walker
Rickettsia australis infection: a murine model of a highly invasive vasculopathic rickettsiosis.
The American journal of pathology 1993;142(5):1471-82.
1993: John Dumler; J E Dawson; David H Walker
Human ehrlichiosis: hematopathology and immunohistologic detection of Ehrlichia chaffeensis.
Human pathology 1993;24(4):391-6.
1993: J I Herrero-Herrero; R Ruiz-Beltrán; David H Walker
Antigens of Rickettsia conorii recognized by seropositive healthy people from Salamanca (central-west Spain).
European journal of epidemiology 1993;9(1):59-63.
1992: J I Herrero-Herrero; David H Walker; R Ruiz-Beltrán
Use of western blot to analyze the reactivity of sera from patients with Mediterranean spotted fever.
European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology 1992;11(10):939-42.
1992: David H Walker; Q H Liu; Xue-Jie Yu; H Li; C Taylor; Hui-Min Feng
Antigenic diversity of Rickettsia conorii.
The American journal of tropical medicine and hygiene 1992;47(1):78-86.
1992: H Li; David H Walker
Characterization of rickettsial attachment to host cells by flow cytometry.
Infection and immunity 1992;60(5):2030-5.
1991: John Dumler; J P Taylor; David H Walker
Clinical and laboratory features of murine typhus in south Texas, 1980 through 1987.
JAMA : the journal of the American Medical Association 1991;266(10):1365-70.
1991: David H Walker; D B Fishbein
Epidemiology of rickettsial diseases.
European journal of epidemiology 1991;7(3):237-45.
1990: David H Walker; Q H Liu; Hui-Min Feng
Update on rickettsiae and rickettsial diseases in China.
Reviews of infectious diseases 1990;12(3):562-3.
1990: H Li; David H Walker
Biological characterization of major polypeptides on the surface of spotted fever group rickettsiae.
Annals of the New York Academy of Sciences 1990;590():389-94.
1990: Q H Liu; David H Walker; G F Zhou
Serologic survey for antibodies to Rickettsia sibirica in Inner Mongolia, People's Republic of China.
Annals of the New York Academy of Sciences 1990;590():237-42.
1990: R Ruiz-Beltrán; J I Herrero-Herrero; David H Walker; A Cuñado-Rodríguez
Mechanism of upper gastrointestinal hemorrhage in Mediterranean spotted fever.
Tropical and geographical medicine 1990;42(1):78-82.
1990: David H Walker
The role of host factors in the severity of spotted fever and typhus rickettsioses.
Annals of the New York Academy of Sciences 1990;590():10-9.
1990: J Aronson; J Scimeca; D Harris; David H Walker
Immunohistologic demonstration of Ehrlichia canis.
Annals of the New York Academy of Sciences 1990;590():148-56.
1989: David H Walker
Rocky Mountain spotted fever: a disease in need of microbiological concern.
Clinical microbiology reviews 1989;2(3):227-40.
1989: David H Walker; F M Parks; T G Betz; J P Taylor; J W Muehlberger
Histopathology and immunohistologic demonstration of the distribution of Rickettsia typhi in fatal murine typhus.
American journal of clinical pathology 1989;91(6):720-4.
1989: M M Nichols; David H Walker; R C Frates; A Davis
Three-month-old infant with diarrhea, fever, and rash.
The Journal of pediatrics 1989;114(1):154-60.
1988: David H Walker; C Occhino; G R Tringali; S Di Rosa; Serafino Mansueto
Pathogenesis of rickettsial eschars: the tache noire of boutonneuse fever.
Human pathology 1988;19(12):1449-54.
1988: H Li; B Lenz; David H Walker
Protective monoclonal antibodies recognize heat-labile epitopes on surface proteins of spotted fever group rickettsiae.
Infection and immunity 1988;56(10):2587-93.
1988: TR Jerrells; H Li; David H Walker
In vivo and in vitro role of gamma interferon in immune clearance of Rickettsia species.
Advances in experimental medicine and biology 1988;239():193-200.
1987: G Tringali; Serafino Mansueto; G Barba; C Occhino; E Farinella; Giustina Vitale; David H Walker
Familial cases of boutonneuse fever.
European journal of epidemiology 1987;3(4):414-8.
1987: David H Walker; J I Herrero-Herrero; R Ruiz-Beltrán; A Bullón-Sopelana; A Ramos-Hidalgo
The pathology of fatal Mediterranean spotted fever.
American journal of clinical pathology 1987;87(5):669-72.
1987: J I Herrero-Herrero; David H Walker; R Ruiz-Beltran
Immunohistochemical evaluation of the cellular immune response to Rickettsia conorii in taches noires.
The Journal of infectious diseases 1987;155(4):802-5.