In the ten-year period, 1980-89, 294 reported outbreaks of food poisoning were associated with eating pre-cooked sliced meats, meat products and other manufactured foods in England and Wales, including 65 outbreaks in which the product was imported. Salmonellas were the most commonly reported agent, causing 132 (45%) of the outbreaks; other bacteria caused a further 51 (17%) outbreaks. The remainder were due to viruses (five outbreaks), scombrotoxin (60 outbreaks), or were of unknown cause (46 outbreaks). The number of outbreaks associated with manufactured foods accounted for only a small proportion (less than 5%) of food poisoning outbreaks reported to CDSC during this period and needs to be set against the huge amounts of manufactured foods consumed. However, because of the quantities made and the widespread distribution of particular products, such outbreaks may affect many individuals who are geographically widespread.