Abstract
The goal is to study the features of the biological properties of Vibrio cholerae strains found in environmental objects (EO) on the territory of Rostov-on-Don from 1989 to 2018.Materials and methods. Bacteriological, molecular biological and statistical methods were used to study 73 strains of cholera vibrios O1, O139 and 1702 strains of nonO1/nonO139 serogroups isolated over a 30-year period.Results and discussion. It was found that in Rostovon-Don, 78.0 % of toxigenic strains were isolated from all isolated from environmental protection in Russia, among which 2 were genetically unchanged. The V. cholerae O1 classical strain and 72 V. cholerae El Tor strains were found, of which 70 % belonged to the Ogawa serovar, and 3 % of the nontoxigenic strains were susceptible to the classical phage. A “very weak direct relationship” was statistically revealed between the isolation of V. cholerae O1, O139 and V. cholerae nonO1/nonO139 strains, in which the dominant serogroups (O67, O76, O75, O53, O16) were identified, and 18 % of the strains showed atypical agglutinability. Revealing the biological characteristics of V. cholerae strains contributes to the optimization of monitoring studies.
Highlights
The goal is to study the features of the biological properties of Vibrio cholerae strains found in environmental objects (EO) on the territory of Rostov-on-Don from 1989 to 2018
Bacteriological, molecular biological and statistical methods were used to study 73 strains of cholera vibrios O1, O139 and 1702 strains of nonO1/nonO139 serogroups isolated over a 30-year period
It was found that in Rostovon-Don, 78.0 % of toxigenic strains were isolated from all isolated from environmental protection in Russia, among which 2 were genetically unchanged
Summary
Особенности биологических свойств Vibrio cholerae, изолированных в процессе мониторинга водных объектов Ростова-на-Дону с 1989 по 2018 год ФКУЗ «Ростовский-на-Дону научно-исследовательский противочумный институт», Ростов-на-Дону, Российская Федерация. Цель – изучение особенностей биологических свойств штаммов холерных вибрионов, обнаруженных в объектах окружающей среды (ООС) на территории Ростова-на-Дону с 1989 по 2018 год. Установлено, что в Ростове-на-Дону выделено 78,0 % токсигенных штаммов от всех изолированных из ООС на территории России, среди которых 2 – генетически не измененные. Обнаружен штамм Vibrio cholerae О1 classical и 72 штамма V. cholerae El Tor, из которых 70 % относились к серовару Огава, а 3 % нетоксигенных штаммов оказались чувствительны к классическому фагу. Статистически выявлена «очень слабая прямая связь» между выделением штаммов V. cholerae O1, О139 и V. cholerae nonO1/nonO139, у которых определены доминирующие серогруппы (О67, О76, О75, О53, О16), а у 18 % штаммов показана атипичность по агглютинабельности. Выявление биологических особенностей штаммов V. cholerae способствует оптимизации мониторинговых исследований.
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