In the present study, all cases occurred within 6e31 h with a
median incubation period of 15 h. Such incubation period is
seen in food poisonings due to Salmonella spp, Clostridia spp and
some cases of B. cereus. Clostridia spp food poisoning commonly
occurs followingconsumption of food whichwasprepared 24h
or more before consumption and presents with diarrhoea but
no fever. Diarrhoeal form of B. cereus has a minimum incubation
period of 12 h and do not have fever. Hence Clostridia and B.
cereus are unlikely cause of the present outbreak.