The Bacterial Flora of the Atlantic Salmon (Salmo salar L.) in Relation to its Environment

S ummary . The aerobic flora of the skin of 56 Atlantic salmon from coastal, estuarine and river waters was analysed quantitatively; 50 skin and 33 gill samples were analysed qualitatively. The water at each sampling station was also analysed. The principal genera on the skin and gills were Moraxella, Flavobacterium, Cytophaga and Pseudomonas ; members of Acinetobacter, Bacillus, Aeromonas, Vibrio , the Entrobacteriaceae, Micro-coccaceae and some coryneforms were also present. The gill flora was similar to that of the skin, which reflected that of the environment.