Abstract
The occurrence of Salmonella was investigated in one hundred ninety five adult, apparently healthy head of cattle brought to the Municipal Slaughterhouse of San Jose, Costa Rica. Material examined included feces, intestinal mucose, mesenteric ganglia, spleen, and liver or bile, with a total incidence of 13- 3 per cent. Fecal matter gave a minimal number -3- of positive cultures, while intestinal mucose and mesenteric ganglia gave the highest yields - 11 and 10, respectively. The serotypes found were, in order of frequency : S. panama, S. newport, S. give, S. abortus-bovis, S. london, S. typhi-murium, S.muenchen and S. edinburg.
Brief remarks are made on the effect of conditions adverse to the animals on the isolation of bacteria from the samples, and its relation to the out breaks of salmonellosis among cattle for export.