Retention of Salmonella typhimurium by certain species of fish and shrimp.

Marine fish (Mugil cephalus, Fundulus heteroclitus, Trachinotus carolinus), lake shrimp (Penaeus setiferus), and channel catfish (Ictalurus lacustris punctatus) were exposed to Salmonella typhimurium and cultured after 2 hours and at daily intervals for 30 days. Salmonella typhimurium was recovered from all exposed animals after 2 hours and for 30 days in all animals except P setifurus. The organisms could not be recovered from those shrimp after the initial sampling period. Apparent salmonellosis developed in certain specimens of M cephalus and T carolinus 10 to 14 days after exposure to S typhimurium.