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Last Updated: Nov 12th, 2006 - 20:38:00 |
Preliminary FoodNet Data on the Incidence of Infection with Pathogens Transmitted Commonly Through Food --- 10 States, United States, 2005
Foodborne illnesses are a substantial health burden in the United States (1). The Foodborne Diseases Active Surveillance Network (FoodNet) of CDC's Emerging Infections Program collects data from 10 U.S. states* regarding diseases caused by enteric pathogens transmitted commonly through food. FoodNet quantifies and monitors the incidence of these infections by conducting active, population-based surveillance for laboratory-confirmed illness (2). This report describes preliminary surveillance data for 2005 and compares them with baseline data from the period 1996--1998. Incidence of infections caused by Campylobacter, Listeria, Salmonella, Shiga toxin--producing Escherichia coli O157 (STEC O157), Shigella, and Yersinia has declined, and Campylobacter and Listeria incidence are approaching levels targeted by national health objectives (3) (Table). However, most of those declines occurred before 2005, and Vibrio infections have increased, indicating that further measures are needed to prevent foodborne illness.
In 1996, FoodNet began active, population-based surveillance for laboratory-confirmed cases of infection from Campylobacter, Listeria, Salmonella, STEC O157, Shigella, Vibrio, and Yersinia. In 1997, FoodNet added surveillance for cases of Cryptosporidium and Cyclospora infection. In 2000, FoodNet began collecting data on STEC non-O157 and comprehensive information on hemolytic uremic syndrome (HUS). FoodNet personnel ascertain cases through contact with all clinical laboratories in their surveillance areas. HUS surveillance is conducted through a network of pediatric nephrologists and infection-control practitioners. In addition, eight states review hospital discharge data to ascertain HUS cases. Because of the time required for review of hospital records, this report contains preliminary 2004 HUS data.
During 1996--2005, the FoodNet surveillance population increased from 14.2 million persons (5% of the U.S. population) in five states to 44.5 million persons (15% of the U.S. population) in 10 states. Preliminary incidence for 2005 was calculated using the number of laboratory-confirmed infections and dividing by 2004 population estimates. Final incidence for 2005 will be reported when 2005 population estimates are available from the U.S. Census Bureau.
2005 Surveillance
In 2005, a total of 16,614 laboratory-confirmed cases of infections in FoodNet surveillance areas were identified, as follows: Salmonella (6,471 cases), Campylobacter (5,655), Shigella (2,078), Cryptosporidium (1,313), STEC O157 (473), Yersinia (159), STEC non-O157 (146), Listeria (135), Vibrio (119), and Cyclospora (65). Overall incidence per 100,000 population was 14.55 for Salmonella, 12.72 for Campylobacter, 4.67 for Shigella, 2.95 for Cryptosporidium, 1.06 for STEC O157, 0.36 for Yersinia, 0.33 for STEC non-O157, 0.30 for Listeria, 0.27 for Vibrio, and 0.15 for Cyclospora. Substantial variation occurred across surveillance sites (Table). In 2004, FoodNet identified 44 cases of HUS in children aged <15 years<5 years<5 years decreased 45
© 2004-2005 by foodconsumer.org unless otherwise specified
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