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BACTERIOSES DE LA TRUITE ARC-EN-CIEL (Salmo
gairdneri irideus) ELEVEE EN EAU DE MER

Elena Dumitrescu et Irina Voicu 
Institut Roumain de Recherches Marines Constanta 


Abstract
The paper presents the most important infectious 
diseases of the rainbow trout(Salmo gairdneri irideus)
occured during its experimental cultivation in Black
Sea water. The bacteria involved in infectious processes
were Aeromonas hydrophila, Vibrio parahaemolyticus and
Vibrio anguillarum, identified according to specific
biochemical tests. Sensibility of subjects as well as
propagation of infectious was more pronunced during
summer, when stressing conditions are also more
pronounced, directly related to higher temperatures,
scarce oxygen conditions; presence of ammonia and
suspended organic matter. Prognisis of the disease
was always negative, final stage of the case history
being septichaemia. Preventive treatment with 
antibiotics applied monthly during the summer, 
reduced mortality by 50%.