Abstract

FERNANDEZ-ABREU, Anabel et al. Determination of biofilms and extended-spectrum beta-lactamases in Vibrio cholerae non-O1, non-O139 isolates from patients with diarrhea in Cuba. Rev Cubana Med Trop [online]. 2019, vol.71, n.2  Epub Sep 30, 2019. ISSN 1561-3054.

Vibrio cholerae non-O1, non-O139 is the third bacterium group from the genus Vibrio most commonly causing diarrhea. It survives in aquatic environments, using the formation of biofilm as a survival mechanism facilitating the transmission of diarrheal disease. Multi-drug resistant V. cholerae isolates have been characterized since the year 1977, and some of the mechanisms involved include the production of extended-spectrum β-lactamases (ESBLs). The purpose of the study was to determine the formation of biofilm in Cuban isolates of V. cholerae non-O1, non-O139 causing acute diarrheal disease (ADD), and detect the production of ESBLs in those with total or intermediate resistance to ampicillin. A descriptive cross-sectional study was conducted from January 2014 to June 2015. The study sample was 55 previously characterized isolates obtained from the strain collection at the ADD National Reference Laboratory of Pedro Kourí Institute. For phenotypic determination of ESBLs, 43 were studied which were known to be susceptible to ampicillin. 54.5 % of the isolates tested positive for biofilm formation, with a predominance of those classified as moderate (46.6 %) and weak (36.6 %) biofilm producers. Of the 34 isolates resistant to ampicillin, 26.5 % were positive for ESBL production. Of the 9 with intermediate ampicillin resistance, 44.4 % were positive. The results of the present study contribute knowledge about their ability to persist in the environment, and provide insight into antimicrobial resistance mechanisms.

Keywords : Vibrio cholerae non-O1; non-O139; ESBL; biofilm.

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