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BioMed Research International
Volume 2015 (2015), Article ID 286473, 11 pages
Research Article

Identification of Extended-Spectrum β-Lactamases Escherichia coli Strains Isolated from Market Garden Products and Irrigation Water in Benin

1Laboratoire de Biologie et de Typage Moléculaire en Microbiologie, Faculté des Sciences et Techniques, Université d’Abomey-Calavi, 05 BP 1604 Cotonou, Benin
2Laboratoire de Microbiologie et de Technologie Alimentaire, FAST, Université d’Abomey-Calavi, ISBA-Champ de foire, 01 BP 526 Cotonou, Benin
3Centre de Recherches Agricoles Sud, Institut National des Recherches Agricoles du Bénin, Attogon, BP 884 Cotonou, Benin

Received 27 July 2015; Revised 19 October 2015; Accepted 12 November 2015

Academic Editor: Frederick D. Quinn

Copyright © 2015 Wassiyath Moussé et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The present study aimed at biochemical and molecular characterization of Escherichia coli strains isolated from horticultural products and irrigation water of Cotonou. The samples were collected from 12 market gardeners of 4 different sites. Rapid’ E. coli medium was used for identification of E. coli strains and the antimicrobial susceptibility was performed by the agar disk diffusion method. The β-lactamases production was sought by the liquid acidimetric method. The genes coding for β-lactamases and toxins were identified by PCR method. The results revealed that about 34.95% of the analyzed samples were contaminated by E. coli. Cabbages were the most contaminated by E. coli (28.26%) in dry season. All isolated strains were resistant to amoxicillin. The penicillinase producing E. coli carried (67.50%), (10%), and (22.50%) genes. The study revealed that the resistance genes such as SLTI (35.71%), SLTII (35.71%), ETEC (7.15%), and VTEC (21.43%) were carried. Openly to the found results and considering the importance of horticultural products in Beninese food habits, it is important to put several strategies aiming at a sanitary security by surveillance and sensitization of all the actors on the risks of some practices.