Food poisoning (such as suspected Bacillus cereus, Campylobacter spp., Clostridium perfringens, Cryptosporidium spp., Entamoeba histolytica, verocytotoxigenic Escherichia coli (including E. coli O157:H7), Salmonella spp., Giardia lamblia, and Yersinia pestis), including suspected clusters or outbreaks.