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Ray Williams

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H David Chapman; T K Jeffers; Ray Williams
Forty years of monensin for the control of coccidiosis in poultry.
Ray Williams
The correct date of the original description and availability of the coccidian name Eimeria meleagridis Tyzzer (Apicomplexa: Eimeriorina: Eimeriidae).
Ray Williams; P Thebo; R N Marshall; J A Marshall
Coccidian oöcysts as type-specimens: long-term storage in aqueous potassium dichromate solution preserves DNA.

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All Publications

2010: H David Chapman; T K Jeffers; Ray Williams
Forty years of monensin for the control of coccidiosis in poultry.
Poultry science 2010;89(9):1788-801.
2010: Ray Williams
The correct date of the original description and availability of the coccidian name Eimeria meleagridis Tyzzer (Apicomplexa: Eimeriorina: Eimeriidae).
Systematic parasitology 2010;76(1):77-9.
2010: Ray Williams; P Thebo; R N Marshall; J A Marshall
Coccidian oöcysts as type-specimens: long-term storage in aqueous potassium dichromate solution preserves DNA.
Systematic parasitology 2010;76(1):69-76.
2009: Ray Williams; R N Marshall; M Pagés; Martina Dardi; E del Cacho
Pathogenesis of Eimeria praecox in chickens: virulence of field strains compared with laboratory strains of E. praecox and Eimeria acervulina.
Avian pathology : journal of the W.V.P.A 2009;38(5):359-66.
2007: Ray Williams
"Serotinous", a descriptor proposed for lines of Eimeria species (Apicomplexa: Eimeriidae) selected for delayed development: an antonym for "precocious".
Veterinary parasitology 2007;145(3-4):388-9.
2006: Anita Haug; Ray Williams; S Larsen
Counting coccidial oocysts in chicken faeces: a comparative study of a standard McMaster technique and a new rapid method.
Veterinary parasitology 2006;136(3-4):233-42.
2006: Ray Williams
Relative virulences of a drug-resistant and a drug-sensitive strain of Eimeria acervulina, a coccidium of chickens.
Veterinary parasitology 2006;135(1):15-23.
2006: Ray Williams
Tracing the emergence of drug-resistance in coccidia (Eimeria spp.) of commercial broiler flocks medicated with decoquinate for the first time in the United Kingdom.
Veterinary parasitology 2006;135(1):1-14.
2005: H David Chapman; B Roberts; Martin Shirley; Ray Williams
Guidelines for evaluating the efficacy and safety of live anticoccidial vaccines, and obtaining approval for their use in chickens and turkeys.
Avian pathology : journal of the W.V.P.A 2005;34(4):279-90.
2005: Ray Williams
Intercurrent coccidiosis and necrotic enteritis of chickens: rational, integrated disease management by maintenance of gut integrity.
Avian pathology : journal of the W.V.P.A 2005;34(3):159-80.
2005: Ray Williams
The efficacy of a mixture of trimethoprim and sulphaquinoxaline against Plasmodium gallinaceum malaria in the domesticated fowl Gallus gallus.
Veterinary parasitology 2005;129(3-4):193-207.
2005: Ray Williams
Avian malaria: clinical and chemical pathology of Plasmodium gallinaceum in the domesticated fowl Gallus gallus.
Avian pathology : journal of the W.V.P.A 2005;34(1):29-47.
2004: P A Holdsworth; DP Conway; M E McKenzie; A D Dayton; H D Chapman; GF Mathis; J T Skinner; H-C Mundt; Ray Williams
World Association for the Advancement of Veterinary Parasitology (WAAVP) guidelines for evaluating the efficacy of anticoccidial drugs in chickens and turkeys.
Veterinary parasitology 2004;121(3-4):189-212.
2003: Ray Williams
Anticoccidial vaccination: the absence or reduction of numbers of endogenous parasites from gross lesions in immune chickens after virulent coccidial challenge.
Avian pathology : journal of the W.V.P.A 2003;32(5):535-43.
2003: Ray Williams; RALPH MARSHALL; Roberto M La Ragione; J Catchpole
A new method for the experimental production of necrotic enteritis and its use for studies on the relationships between necrotic enteritis, coccidiosis and anticoccidial vaccination of chickens.
Parasitology research 2003;90(1):19-26.
2002: Ray Williams
Fifty years of anticoccidial vaccines for poultry (1952-2002).
Avian diseases 2002;46(4):775-802.
2002: Ray Williams
Anticoccidial vaccines for broiler chickens: pathways to success.
Avian pathology : journal of the W.V.P.A 2002;31(4):317-53.
2002: Ray Williams; L Gobbi
Comparison of an attenuated anticoccidial vaccine and an anticoccidial drug programme in commercial broiler chickens in Italy.
Avian pathology : journal of the W.V.P.A 2002;31(3):253-65.
2002: H David Chapman; T E Cherry; H D Danforth; G Richards; Martin Shirley; Ray Williams
Sustainable coccidiosis control in poultry production: the role of live vaccines.
International journal for parasitology 2002;32(5):617-29.
2001: Ray Williams; J A Marshall; J Catchpole
A novel method for counting eimerian oocysts at very low concentrations in aqueous suspensions.
Research in veterinary science 2001;71(1):67-71.
2001: Ray Williams
Quantification of the crowding effect during infections with the seven Eimeria species of the domesticated fowl: its importance for experimental designs and the production of oocyst stocks.
International journal for parasitology 2001;31(10):1056-69.
2001: Ray Williams; S J Andrews
The origins and biological significance of the coccidial lesions that occur in chickens vaccinated with a live attenuated anticoccidial vaccine.
Avian pathology : journal of the W.V.P.A 2001;30(3):215-20.
2000: Ray Williams; J D Johnson; S J Andrews
Anticoccidial vaccination of broiler chickens in various management programmes: relationship between oocyst accumulation in litter and the development of protective immunity.
Veterinary research communications 2000;24(5):309-25.
2000: Ray Williams; J Catchpole
A new protocol for a challenge test to assess the efficacy of live anticoccidial vaccines for chickens.
Vaccine 2000;18(13):1178-85.
1999: Ray Williams
A compartmentalised model for the estimation of the cost of coccidiosis to the world's chicken production industry.
International journal for parasitology 1999;29(8):1209-29.
1999: Ray Williams
Three enzymes newly identified from the genus Eimeria and two more newly identified from E. maxima, leading to the discovery of some aliphatic acids with activity against coccidia of the domesticated fowl.
Veterinary research communications 1999;23(3):151-63.
1999: Ray Williams; W W Carlyle; D R Bond; I A Brown
The efficacy and economic benefits of Paracox, a live attenuated anticoccidial vaccine, in commercial trials with standard broiler chickens in the United Kingdom.
International journal for parasitology 1999;29(2):341-55.
1998: Ray Williams
Epidemiological aspects of the use of live anticoccidial vaccines for chickens.
International journal for parasitology 1998;28(7):1089-98.
1998: Ray Williams
A laboratory method for the single-passage selection of drug-resistant mutants from populations of Eimeria species in chickens and its potential value in the choice of field use concentrations for new anticoccidial drugs.
Avian pathology : journal of the W.V.P.A 1998;27(4):366-72.
1998: Ray Williams
Analysis of the phenotypes in field populations of Eimeria acervulina expressing dual drug-resistance to decoquinate and clopidol.
Avian pathology : journal of the W.V.P.A 1998;27(1):67-73.
1997: Ray Williams
Laboratory tests of phenolic disinfectants as oocysticides against the chicken coccidium Eimeria tenella.
The Veterinary record 1997;141(17):447-8.
1997: Ray Williams
A self-filling micropipette for the isolation of single coccidial oocysts.
Research in veterinary science 1997;62(3):301.
1997: Ray Williams
The mode of action of anticoccidial quinolones (6-decyloxy-4-hydroxyquinoline-3-carboxylates) in chickens.
International journal for parasitology 1997;27(1):101-11.
1996: Ray Williams; A C Bushell; J M Reperant; T G Doy; J H Morgan; M W Shirley; P Yvore; M M Carr; Y Fremont
A survey of Eimeria species in commercially-reared chickens in France during 1994.
Avian pathology : journal of the W.V.P.A 1996;25(1):113-30.
1996: Ray Williams
The ratio of the water and food consumption of chickens and its significance in the chemotherapy of coccidiosis.
Veterinary research communications 1996;20(5):437-47.
1995: Ray Williams
Epidemiological studies of coccidiosis in the domesticated fowl (Gallus gallus):III. The influence of the fowl's defaecation pattern on the excretion patterns of Eimeria tenella and E acervulina oocysts.
Applied parasitology 1995;36(4):279-89.
1995: Ray Williams
Epidemiological studies of coccidiosis in the domesticated fowl (Gallus gallus): IV. reciprocity between the immune status of floor-reared chickens and their excretion of oocysts.
Applied parasitology 1995;36(4):290-8.
1995: Ray Williams; D A Farebrother; V S Latter
Coccidiosis: a radiological study of sulphaquinoxaline distribution in infected and uninfected chickens.
Journal of veterinary pharmacology and therapeutics 1995;18(3):172-9.
1995: Ray Williams
Epidemiological studies of coccidiosis in the domesticated fowl (Gallus gallus): II. Physical condition and survival of Eimeria acervulina oocysts in poultry-house litter.
Applied parasitology 1995;36(2):90-6.
1995: Ray Williams
Epidemiological studies of coccidiosis in the domesticated fowl (Gallus gallus): I. The fate of ingested oocysts of Eimeria tenella during the prepatent period in susceptible chicks.
Applied parasitology 1995;36(2):83-9.
1994: Ray Williams
Safety of the attenuated anticoccidial vaccine 'Paracox' in broiler chickens isolated from extraneous coccidial infection.
Veterinary research communications 1994;18(3):189-98.
1992: Ray Williams
Differences between the anticoccidial potencies of monensin in maize-based or wheat-based chicken diets.
Veterinary research communications 1992;16(2):147-52.
1991: Ray Williams
Caecal deformity in the fowl.
The Veterinary record 1991;128(18):436.
1986: Ray Williams
Hapantotypes: a possible solution to some problems of parasite nomenclature.
Parasitology today (Personal ed.) 1986;2(11):314-6.
1986: Ray Williams
Host specificity of avian coccidia.
Parasitology today (Personal ed.) 1986;2(10):283-4.
1986: Ray Williams
Packed cell volume of blood from male domestic chicks.
British poultry science 1986;27(3):483-5.
1986: Ray Williams
On the aetiology of intestinal intussusception in the fowl.
Avian pathology : journal of the W.V.P.A 1986;15(2):301-4.
1985: Ray Williams
Does Plasmodium gallinaceum induce relapse of Eimeria acervulina infection in chickens?
Research in veterinary science 1985;39(2):261-2.
1985: Ray Williams
Biliverdin production in chickens infected with the malarial parasite Plasmodium gallinaceum.
Avian pathology : journal of the W.V.P.A 1985;14(3):409-19.
1985: Ray Williams
Plasmodium gallinaceum and subsequent Eimeria acervulina infections in chickens are not synergistic.
Parasitology 1985;90(Pt 2):237-40.
1985: A T Hudson; A W Randall; M Fry; C D Ginger; B Hill; V S Latter; N McHardy; Ray Williams
Novel anti-malarial hydroxynaphthoquinones with potent broad spectrum anti-protozoal activity.
Parasitology 1985;90 ( Pt 1)():45-55.
1984: M Fry; A T Hudson; A W Randall; Ray Williams
Potent and selective hydroxynaphthoquinone inhibitors of mitochondrial electron transport in Eimeria tenella (Apicomplexa: Coccidia).
Biochemical pharmacology 1984;33(13):2115-22.
1984: D W Piercy; Ray Williams; G White
Evaluation of a mixture of trimethoprim and sulphaquinoxaline for the treatment of poultry: safety and palatability studies.
The Veterinary record 1984;114(3):60-2.
1984: M Fry; Ray Williams
Effects of decoquinate and clopidol on electron transport in mitochondria of Eimeria tenella (Apicomplexa: Coccidia).
Biochemical pharmacology 1984;33(2):229-40.
1983: G White; Ray Williams
Evaluation of a mixture of trimethoprim and sulphaquinoxaline for the treatment of bacterial and coccidial diseases of poultry.
The Veterinary record 1983;113(26-27):608-12.
1983: J L Rideout; T A Krenitsky; E Y Chao; GB Elion; Ray Williams; V S Latter
Pyrazolo[3,4-d]pyrimidine ribonucleosides as anticoccidials. 3. Synthesis and activity of some nucleosides of 4-[(arylalkenyl)thio]pyrazolo[3,4-d]pyrimidines.
Journal of medicinal chemistry 1983;26(10):1489-94.
1982: J L Rideout; T A Krenitsky; George W Koszalka; N K Cohn; E Y Chao; GB Elion; V S Latter; Ray Williams
Pyrazolo[3,4-d]pyrimidine ribonucleosides as anticoccidials. 2. Synthesis and activity of some nucleosides of 4-(alkylamino)-1H-pyrazolo[3, 4-d]pyrimidines.
Journal of medicinal chemistry 1982;25(9):1040-4.
1982: T A Krenitsky; J L Rideout; George W Koszalka; R B Inmon; E Y Chao; GB Elion; V S Latter; Ray Williams
Pyrazolo[3,4-d]pyrimidine ribonucleosides as anticoccidials. 1. Synthesis and activity of some nucleosides of purines and 4-(alkylthio)pyrazolo[3,4-d]pyrimidines.
Journal of medicinal chemistry 1982;25(1):32-5.
1978: L P Joyner; E U Canning; P L Long; D Rollinson; Ray Williams
A suggested terminology for populations of coccidia (Eimeriorina), particularly of the genus Eimeria (Protozoa: Apicomplexa).
Parasitology 1978;77(1):27-31.
1973: Ray Williams
Effects of different infection rates on the oocyst production of Eimeria acervulina or Eimeria tenella in the chicken.
Parasitology 1973;67(3):279-88.
1973: Ray Williams
The effect of Eimeria acervulina on the reproductive potentials of four other species of chicken coccidia during concurrent infections.
The British veterinary journal 1973;129(3):xxix-xxxi.
1969: Ray Williams
The persistence of drug resistance in strains of Eimeria species in broiler chickens following a change of coccidiostat.
Research in veterinary science 1969;10(5):490-2.
1968: Ray Williams
Control of the discharge of cnidae in Diadumene luciae (Verrill).
Nature 1968;219(5157):959.