Food Safety
Diseases spread by contaminated foods continue to challenge the public health system. Bacteria, viruses, parasites, and chemicals can cause foodborne diseases, which can vary from mild to fatal.1Robust surveillance for these diseases is essential for detecting outbreaks. It also provides critical information to food regulatory agencies and the food industry so that appropriate control and preventive measures can be implemented.2
The Prevention Status Reports (PSRs) highlight—for all 50 states and the District of Columbia—the status of select practices that can help states prevent or reduce foodborne illness. These practices include
- Increasing the speed of pulsed-field gel electrophoresis (PFGE) testing of reported Escherichia coli (E. coli) O157 cases
- Increasing the completeness of PFGE testing of reportedSalmonella cases
These practices have been recommended by the Council to Improve Foodborne Outbreak Response on the basis of scientific evidence supporting their effectiveness in improving foodborne disease surveillance and detection.3
Policies & Practices
Speed of pulsed-field gel electrophoresis (PFGE) testing of reported E. coliO157 cases
Pulsed-field gel electrophoresis, or PFGE, is a technique used to distinguish between strains of organisms at the DNA level. Speed of PFGE testing is defined as the annual proportion of E. coli O157 PFGE patterns reported to CDC (i.e., uploaded into PulseNet, the CDC-coordinated national molecular subtyping network for foodborne disease surveillance) within four working days of receiving the isolate in the state public health PFGE lab.
The CDC Public Health Emergency Preparedness Cooperative Agreement provides federal funding to states and establishes a national performance target of testing 90% of reported E. coli O157 cases within four days. Performing DNA fingerprinting as quickly as possible for all Shiga toxin-producing E. coli improves detection of outbreaks. Rapid outbreak detection can help prevent additional cases and can help identify control and prevention measures for food regulatory agencies and the food industry.2
Status of the speed of PFGE testing of reported E. coli O157 cases, United States (2011)
± How the ratings were determined
± More information on this indicator
Completeness of PFGE testing of reported Salmonella cases
Completeness of PFGE testing of reported Salmonella cases is defined as the annual proportion ofSalmonella cases reported to CDC’s National Notifiable Diseases Surveillance System (NNDSS) with PFGE patterns uploaded into PulseNet. Research and experts in the field agree that performing DNA fingerprinting of all Salmonella cases would improve detection of outbreaks.2
Status of the completeness of PFGE testing of reported Salmonella cases, United States (2011)
(State count includes the District of Columbia.)
± How the ratings were determined
± More information on this indicator
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