Abstract

An experiment was conducted to determine if silver carp infected with salmonella could be depurated following transfer to clean water. A total of 140 silver carp was acclimated in static water, plastic swimming pools (7.3 m 2 surface area) for 29 days. Pools were inoculated daily with a streptomycin-resistant strain of Salmonella typhimurium at a rale of 10 000 cells per liter of water. Thirty fish in lots of five fish each were examined for the presence of S. typhimurium in the kidney, mucous and intestine. Of these lots five contained salmonella in the intestine and one in the mucous and kidney. Infected fish were than transferred to clean static water, plastic pools for depuration. Thirty fish in lots of five each were sampled for salmonella in the mucous, kidney and intestine after being held for 4 and 14 days in clean water. Salmonella was isolated from the intestines of four lots. Silver carp were thus shown to be potential carriers of salmonella.

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