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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 14, Issue:10, October, 2025

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com /
submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2025.14(10): 158-169
DOI: https://doi.org/10.20546/ijcmas.2025.1410.016


Molecular Characterization of blaCTX-M-15 Gene Among blaTEM and blaSHV Variants Isolated on Gram Negative Bacilli Collected in Emergency Units at University Hospital Center, Yalgado Ouedraogo, Burkina Faso
ZONGO Koudbi Jacob1,2,4*METUOR DABIRE Amana1, 2, 4KABORÉ Boukaré1,5, SANOU Idrissa3 and ZEBA Boukaré1, 2
1Laboratory of Enzymology of Bacterial Chemo-Resistance, Joseph Ki-Zerbo University, 03 BP 7021, Ouagadougou, Burkina Faso
2Laboratory of Molecular Biology and Genetics, Joseph Ki-Zerbo University, 03 BP 7021, Ouagadougou 03, Burkina Faso 3Laboratory of Bacteriology-Virology, Tengandogo University Hospital Center, Joseph Ki-Zerbo University, 03 BP 7021, Ouagadougou 03, Burkina Faso 4Daniel OUEZZIN COULIBALY University, BP 176, Dédougou, Burkina Faso 5Laboratory of Biochemistry and Applied Immunology, Joseph Ki-Zerbo University, 03 BP 7021, Ouagadougou 03, Burkina Faso

*Corresponding author
Abstract:

Extended-spectrum β-lactamase producing Gram negative bacilli constitute a global public health threat. The ESBLs CTX-M, TEM and SHV remain the most frequently isolated worldwide, with high proportions of CTX-M reported and widely distributed in pathogens. Several authors report that the bacterial strains harboring the CTX-M-15 gene are generally multidrug-resistant strains. This study aim to identify the variants of blaCTX-M, blaTEM and blaSHV hosted by Gram negative bacilli at hospital center Yalagdo Ouédraogo. This study take on bacterial strains collected in a previous study (DOI: 10.5897/AJB2014.13908). Bacterial strains had been isolated from biological samples such as stools, urine, blood, cerebrospinal fluid, effusion fluids (pus, ascitic fluid, pleural fluid...) and genital swabs.. During this previous study, 259 strains resistant to at least one third-generation cephalosporin had been collected and identified using API20E. This study had shown that some of these bacterial strains harbor blaCTX-M, blaTEM and blaSHV. For the present study, from a young bacterial culture, genomic DNA extraction was performed by the boiling method and conventional PCR was used to confirm the presence of resistance genes. PCR products from a total of 17 bacterial strains were subjected to Sanger sequencing for genes variants determination. In the previous study, among 259 strains collected, molecular characterization had shown that 112 strains (65.49%) were positive for blaCTX-M screening; 44 strains (25.73%) for blaTEM screening and 32 strains (18.71%) for blaSHV. For the present study, among 17 bacterial strain consisting to 7 Escherichia coli, 4 Klebsiella pneumoniae, 3 Pseudomonas aeruginosa, 1 Enterobacter sp, 1 Citrobacter sp and 1 Salmonella tiphy, blaCTX-M-15 and blaSHV-28 genes were found respectively on 82.35% and 5.88% of all bacterial strains analyzed, while the blaTEM-1 and blaSHV-11 were each harbored by 23.53% of the isolates. The current situation of bacterial resistance remains dominated by the spread of broad-spectrum beta-lactamases. A high proportion of bacterial strains studied resist by production of ESBLs type CTX-M-15. Measures must be implemented to slow the emergence and spread of ESBL-producing Gram-negative bacilli through the appropriate use of antibiotics.


Keywords: Gram negative bacilli, PCR, sequencing, blaTEM, blaSHV, blaCTX-M-15


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How to cite this article:

Zongo Koudbi Jacob, Metuor Dabire Amana, Kaboré Boukaré, Sanou Idrissa and Zeba Boukaré. 2025. Molecular Characterization of blaCTX-M-15 Gene Among blaTEM and blaSHV Variants Isolated on Gram Negative Bacilli Collected in Emergency Units at University Hospital Center, Yalgado Ouedraogo, Burkina Faso.Int.J.Curr.Microbiol.App.Sci. 14(10): 158-169. doi: https://doi.org/10.20546/ijcmas.2025.1410.016
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