Genotypic Detection and Characterization of Adhesins in Clinical Escherichia coli Isolates

Main Article Content

M. Y. Iliyasu
I. Mustapha
H. Yakubu
H. M. Shuaibu
A. F. Umar
E. B. Agbo
A. Uba
Y. Y. Deeni

Abstract

Background of Study: Many virulence determinants contribute to the pathogenicity of Gram negative bacteria, like Escherichia coli, which is the most common cause of many infections worldwide such as urinary tract infection (UTI), profuse diarrhoea and septicaemia.

Aim: To determine the genotypic characteristics of adhesin-producing E. coli isolates from clinical specimens.

Place and Duration of Study: Conducted at the Infectious diseases hospital Bayara, Bauchi state, Nigeria, between February to March, 2019.

Methods: A total of twelve (12) Gram negative bacterial isolates were selected based on the ability to grow on Luria-Bertani (LB) agar medium containing 100 µg/ml ampicillin. The isolates were from urine, stool, and blood specimens. The isolates were screened for multidrug resistant pattern according to Kirby-Bauer disc diffusion method. Adhesion factors, Fimbrial adhesin (fimH) and Invasive plasmid adhesin (ipaH) was genotyped by conventional PCR and sequenced.

Results: All the isolates were resistant to Ampicillin, Cephalothin, Erythromycin, Fusidic acid, Novobiocin and Oxacillin, but sensitive to Augmentin, Colistin sulphate and Imipenem. Presence of fimH and ipaH genes were observed in nine isolates that expressed strong relationship with. Multidrug resistance (MDR). The fimH was the most prevalent found in urine, stool and blood isolates. Most of the adhesion genes sequence (61.8%) in this study had significant alignment (95 to 100% homology) with E.coli genome in the NCBI database.

Conclusion: This study revealed the role of adhesin as virulence markers in MDR Gram negative bacteria and FimH is one of the commonest gene in MDR E.coli pathotypes.

Keywords:
Multidrug resistance, adhesion factors, fimbriae adhesion, invasive plasmid adhesion, genome.

Article Details

How to Cite
Iliyasu, M. Y., Mustapha, I., Yakubu, H., Shuaibu, H. M., Umar, A. F., Agbo, E. B., Uba, A., & Deeni, Y. Y. (2020). Genotypic Detection and Characterization of Adhesins in Clinical Escherichia coli Isolates. Microbiology Research Journal International, 30(8), 84-93. https://doi.org/10.9734/mrji/2020/v30i830254
Section
Original Research Article

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