Reptile contact was associated with salmonellosis. Breast-feeding was found to be protective against infant salmonellosis. The 1997 FoodNet E. coli O157 case-control study was conducted to determine the proportion of culture confirmed cases of E. coli O157 infections that are attributable to eating meat, poultry, and other products. A second E. coli O157 case-control study was conducted in 1999. The objectives of the study include determining the proportions of culture-confirmed cases of sporadic Campylobacter infections, and specific antimicrobial susceptibility patterns, that are attributable to eating meat, poultry, and other products, and the proportion of infections attributable to contact with farm or companion animals.
Analysis is ongoing.
In 1999, FoodNet began a 2 year case-control study to determine sources and risk factors for Cryptosporidium infection. Specific objectives for this study include determining the estimate of the burden of illness associated with Cryptosporidium infections in the population under study and determining the proportion of laboratory confirmed cases of sporadic Cryptosporidium infections attributable to consuming certain foods or water, and the proportion of infections attributable to contact with recreational water or farm animals. Eight FoodNet sites are participating in this survey. Specific goals of the study include identifying dietary, medical, and behavioral risk factors for listeriosis, describing the spectrum of illness in patients with listeriosis and describing the antimicrobial resistance patterns and molecular subtypes of L. monocytogenes isolates from these patients.