ArticleBMC microbiology2026
Virulence gene profiles and antimicrobial resistance in clinical and environmental isolates of Non-O1/Non-O139 Vibrio cholerae.
Article in BMC microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Vibrio cholerae is a human pathogen transmitted through the consumption of contaminated food or water. The O1 and O139 serogroups can lead to cholera outbreaks and epidemics, while non-O1/non-O139 serogroups can cause sporadic moderate or mild diarrhea and can also cause systemic infections. In this study, we performed genomic sequencing and phenotypic assays on 13 non-O1/non-O139 V. cholerae isolates (7 clinical and 6 environmental strains). Our results revealed that, except for the environmental isolate NOVC12, most clinical and environmental strains clustered separately on the phylogenetic tree. All isolates lacked the virulence genes ctxAB and tcpA, but harbored potential virulence factors including hlyA, gbpA, and rtxA. All strains may encode the type VI secretion system, while most clinical isolates and two environmental isolates additionally harbor the component genes of the type III secretion system. Five clinical isolates and two environmental isolates likely harbor integrative and conjugative elements. Phenotypic assays confirmed that these strains exhibited hemolytic activity, biofilm formation, and motility, and all strains were susceptible to tetracycline and azithromycin. The results of this study provide insights into the characteristics of clinical and environmental isolates of non-O1/non-O139 V. cholerae. Surveillance of these strains is of great significance for the prevention and control of disease infections.
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