Abstract
A total of 21 isolates of Vibrio cholerae non-O1 strains were isolated from three wastewater treatment plants in Agadir, Morocco. The isolates were analyzed by biochemical analysis, antibiogram, pulsed-field gel electrophoresis and the MALDI-TOF patterns of their protein masses were compared. Over 67% of isolates were susceptible to antimicrobial agents tested and 14% proved resistant to both trimethoprim-sulfamethoxazole and nalidixic acid. Typing by pulsed-field gel electrophoresis with NotI digestion revealed that the V. cholerae non-O1 strains from Agadir (Morocco) have a lower level of genetic homogeneity, the restriction patterns of whole-chromosomal DNA grouped the V. cholerae O1 and V. alginolyticus strains into a separate cluster from V. metschnikovii and V. cholerae non-O1 isolates. Furthermore, to gain additional analytical accuracy and reliability in the analysis we used dendrogram based on MALDI-TOF spectral patterns generated by the BioTyper 1.1™ software. All m/z signatures of all strains tested indicate that the mass spectral data contained sufficient information to distinguish between strains of V. cholerae.
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Acknowledgments
We thank Dr A. Van Dorsselear (UMR-7178), Pr B. Ludes (EA-4438) for access to MALDI-TOF facilities, and Institut de Bactériologie for Vitek II facilities.
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Eddabra, R., Moussaoui, W., Prévost, G. et al. Occurrence of Vibrio cholerae non-O1 in three wastewater treatment plants in Agadir (Morocco). World J Microbiol Biotechnol 27, 1099–1108 (2011). https://doi.org/10.1007/s11274-010-0556-7
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DOI: https://doi.org/10.1007/s11274-010-0556-7