[Enterotoxicity of NAG vibrios].

Eighty six of 105 vibrio NAG strains, tested by ligation of the rabbit intestinal loop, presented enterotixigenic properties. A proportion of 97.4% of the strains belonging to biochemical group I presented a positive test, as compared to 71.4% of the strain belonging to biochemical group II. The results clearly revealed the seasonal character (June to August) of the incidence of NAG vibrios in the samples and the enterotoxicity. Enterotoxic strains were more frequent in the fish and feces samples than in water samples. This might suggest the possible induction of enterotoxigenesis by various as yet unknown mechanisms.