The distribution of foodborne disease by risk setting--Ontario.

The overall surveillance of enteric diseases in Ontario currently relies on the reporting of disease events by local public-health units to a centralized information system known as RDIS (Reportable Diseases Information System). Outbreak occurrences of enteric disease are reported and documented in the outbreak module of RDIS. Sporadic cases are reported separately using a case-by-case reporting module of the same system. The RDIS database was accessed in order to investigate the distribution of foodborne disease by risk setting. In the process of this investigation, issues concerning the true magnitude of foodborne disease in Ontario were also identified and are presented in the discussion of this report.