Communications: Viability of Bacterial Pathogens in Frozen Fish

Abstract

Channel catfish Ictalurus punctatus injected with Aeromonas hydrophila, Pseudomonas fluorescens, Edwardsiella tarda, or E. ictraluri were frozen at ?20°C after death. Bacterial isolation at 2-d intervals after freezing indicated that A. hydrophila could be recovered for 20 d, P. fuorescens for 60 d, E. tarda for 50 d, and E. ictaluri for 30 d in frozen fish.