Transit of enterobacteria originating from homeotherms in fish living at low temperature

The transit of three enterobacteria (Escherichia coli, Salmonella typhimurium, Serratia sp.) normally housed in the digestive tract of homeotherms was experimentally studied in rainbow trout. Bacterial bodies occurred very soon after ingestion of the marked pellet by fish and showed that a part of the microbial population at least did not accompany the solid phase. The excretion of bacteria with the strain utilized and according to the temperature. The strains did not seem to multiply when passing through the digestive compartments.