Continued decline in the incidence of Campylobacter infections, FoodNet 1996-2006.

Campylobacter is a leading cause of foodborne illness worldwide. In the United States, changes in the incidence of culture-confirmed Campylobacter infections have been monitored by the Foodborne Diseases Active Surveillance Network (FoodNet) since 1996. In 2006, the incidence of culture-confirmed Campylobacter infection in the FoodNet sites was 12.7 per 100,000 persons. This represents a 30% decline (95% confidence = 35% to 24% decrease) compared to the 1996-1998 illness baseline; however, most of the decline occurred between 1996 and 1999 and the incidence still remains above the national health objective. Important declines were observed in four FoodNet sites (California, Connecticut, Georgia, and Maryland), all age groups, and both sexes. To promote continued progress towards achieving the national health objective, the epidemiology of Campylobacter infections in the United States, including geographic variation and higher incidence among the very young, warrants further study.