Colistin-resistant Carrying in Food, Water, Hand Rinse, and Healthy Human Gut in Bangladesh

Overview

Journal Gut Pathog

Publisher Biomed Central

Specialty Gastroenterology

Date 2020 Feb 1

PMID 32002025

Citations 22

Authors

Fatema-Tuz Johura

Jarin Tasnim

Indrajeet Barman

Sahitya Ranjan Biswas

Fatema Tuz Jubyda

Marzia Sultana

Christine Marie George

Andrew Camilli

Kimberley D Seed

Niyaz Ahmed

Munirul Alam

Affiliations

Soon will be listed here.

Abstract

Background: One of the most significant public health concerns in today's world is the persistent upsurge of infections caused by multidrug resistant bacteria. As a result, clinicians are being forced to intervene with either less effective backup drugs or ones with substantial side-effects. Colistin is a last resort antimicrobial agent for the treatment of infections caused by multi-drug resistant gram-negative bacteria.

Methods: (n = 65) isolated from street food (n = 20), hand rinse (n = 15), surface water (n = 10), and healthy human stool (n = 20) were tested for colistin resistance gene and response to antimicrobial agents. Antimicrobial resistance genes and virulence genes were detected by employing polymerase chain reaction. DNA fingerprinting of the strains were determined by pulsed-field gel electrophoresis.

Results: Screening of allowed us to confirm colistin resistance marker gene 1 in 13 strains (street food, n = 4; hand rinse, n = 2; surface water, n = 4; and stool, n = 3); and two of these strains carrying -1 harbored gene encoding extended spectrum beta lactamase. Antibiotic assay results revealed all 13 strains carrying -1 to be multi-drug resistant (MDR), including to colistin. The minimum inhibitory concentration (MIC) for colistin ranged from 2 to 6 μg/ml. DNA sequencing confirmed homogeneity of the nucleotide sequence for , but the strains were heterogenous, as confirmed by pulsed-field gel electrophoresis suggesting horizontal transmission of colistin resistance in Bangladesh.

Conclusion: Widespread dissemination of strains carrying -1 encoding resistance to colistin in the present study is alarming as this is the last resort drug for the treatment of infections caused by MDR gram-negative bacteria resistant to almost all drugs used commonly.

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