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2007: Parsons M B; Cooper K L F; Kubota K A; Puhr N; Simington S; Calimlim P S; Schoonmaker-Bopp D; Bopp C; Swaminathan B; Gerner-Smidt P; Ribot E M
PulseNet USA standardized pulsed-field gel electrophoresis protocol for subtyping of Vibrio parahaemolyticus.
Foodborne pathogens and disease 2007;4(3):285-92.
PulseNet is a national molecular subtyping network for foodborne disease surveillance composed of public health and food regulatory agencies. Participants employ molecular subtyping of foodborne pathogens using a standardized method of pulsed-field gel electrophoresis (PFGE) for conducting laboratory-based surveillance of foodborne pathogens. The PulseNet standardized PFGE protocols are developed through a comprehensive testing process. The reproducibility of the protocol undergoes an internal evaluation at the Centers for Disease Control and Prevention and an external evaluation in multiple PulseNet laboratories. Here we describe the development and evaluation of a rapid PFGE protocol for subtyping Vibrio parahaemolyticus for use in PulseNet activities. The protocol was derived from the existing standardized PulseNet protocols for Escherichia coli O157:H7 and Vibrio cholerae. An external evaluation of this protocol was undertaken in collaboration with three PulseNet USA participating public health laboratories. Comparative analysis of the PFGE fingerprints generated by each of these laboratories demonstrated that the protocol is both reliable and reproducible in the hands of multiple users.

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