[EVALUATION OF FUNCTIONAL FEATURES AND STRESS RESISTANCE OF ISOGENIC TOXIGENIC AND NON-TOXIGENIC BIOVAR EL TOR VIBRIO CHOLERAE STRAINS].

Aim: Comparative evaluation of functional features of toxigenic biovar El Tor Vibrio cholerae strains and their spontaneous non-toxigenic mutants and study of their resistance to saline and oxidative stress.

Materials And Methods: 8 biovar El Tor V. cholerae strains were studied: 4 clinical strains isolated in 1970 from patients in Astrakhan and 4 spontaneous non-toxigenic mutants of these strains that have lost cholera toxin genes as a result of residence in river water at the temperature of 25°C.