Screening and Identification of Chromium Resistant Bacteria from Poultry Excreta

Authors

  • Md Abu Sayem Khan Department of Microbiology, University of Dhaka. Dhaka-1000, Bangladesh
  • Md Muzahidul Islam Badhon Department of Microbiology, University of Dhaka. Dhaka-1000, Bangladesh
  • Supantha Rivu Department of Microbiology, University of Dhaka. Dhaka-1000, Bangladesh
  • Sabita Rezwana Rahman Department of Microbiology, University of Dhaka. Dhaka-1000, Bangladesh

DOI:

https://doi.org/10.3329/bjm.v40i1.71593

Keywords:

Chromium, Poultry, Excreta

Abstract

The occurrence of heavy metal-resistant bacteria in the environment acts as an indicator of heavy metal pollution. The impact of heavy metal contamination in co-selection and proliferation of antimicrobial[1]resistant bacteria is well-documented in existing literature. The present study aims to determine the occurrence of chromium-resistant bacteria (CRB) in poultry feces and to characterize their antimicrobial resistance and biofilm formation ability. 28 CRBs were isolated by inoculating samples on chromium-amended media. 6 of 28 isolates were resistant to a maximum of 1000 ppm chromium. Isolated CRBs also showed varying degrees of resistance to other heavy metals, including Cd, Ni, and Hg. Biofilm formation was observed in 67.8% isolates, of which 60.7% and 7.1% were weak and moderate biofilm former, respectively. All the isolates exhibited sensitivity to Gentamicin, Chloramphenicol, Imipenem, and Amikacin. Only one isolate was multi-drug resistant. In addition, all the isolates possessed chromate reductase gene that confirmed their chromium-reducing activity. Two isolates were identified as Bacillus altituidinis and Brevibcillus parabrevis on the basis of 16s rRNA analysis. Further estimation of chromium-reduction capacity and whole genome analysis will reveal their bioremediation potential.

Bangladesh J Microbiol, Volume 40, Number 1, June 2023, pp 1-6

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Published

2024-03-13

How to Cite

Khan, M. A. S. ., Badhon, M. M. I. ., Rivu, S. ., & Rahman, S. R. . (2024). Screening and Identification of Chromium Resistant Bacteria from Poultry Excreta. Bangladesh Journal of Microbiology, 40(1), 1–6. https://doi.org/10.3329/bjm.v40i1.71593

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Original Articles