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Emergence of multidrug-resistant Salmonella Gloucester and Salmonella typhimurium in Bangladesh

Emergence of multidrug-resistant Salmonella Gloucester and Salmonella typhimurium in Bangladesh

Authors :
M, Rahman
H, Islam
D, Ahmed
R B, Sack
Source :
Journal of health, population, and nutrition. 19(3)
Publication Year :
2002

Abstract

Infections due to non-typhoid Salmonella, resistant to antibiotics, have recently emerged as an important health problem worldwide. Antibiotic resistance was studied by the disc-diffusion method among 3,876 (2.78%) non-typhoid Salmonella isolates cultured from 139,279 faecal samples in a diarrhoea treatment centre in Dhaka, Bangladesh, during 1989-1996. Of 499 salmonellae isolated in 1989, serogroup C (1.12%) was the most common, followed by Salmonella Typhi (0.72%) and serogroup B (0.71%). Isolation rate of serogroup B increased significantly to 2.18% (p0.01) in 1992 compared to 0.56% in 1991, 2.86% in 1995, and 2.48% in 1996. Serotyping of 194 serogroup B isolates revealed Salmonella Typhimurium (52%) and Salmonella Gloucester (45%) as predominant serotypes. Resistance to ampicillin (A), chloramphenicol (C), and trimethoprim-sulphamethoxazole (Sxt) (R type-ACSxt) increased to 89-100% during 1992-1996 from 20-28% during 1989-1991 (p0.01) among S. Typhimurium and S. Gloucester isolates. In 1993, 8-10% of the strains of both the serotypes, resistant to ampicillin, chloramphenicol, and trimethoprim-sulphamethoxazole, acquired resistance to ceftriaxone (Cr) (R type-ACSxtCr), which increased to 85-92% in 1996 (p0.01). All were susceptible to ciprofloxacin. A 157-kb conjugative plasmid transferred R type-ACSxt from both the serotypes to Escherichia coli K-12. The findings of the study suggest the emergence of multidrug-resistant S. Gloucester and S. Typhimurium for the first time as a significant health problem in Bangladesh, and surveillance is essential to monitor the resistant non-typhoid Salmonella and identify its sources and modes of transmission.

Details

ISSN :
16060997
Volume :
19
Issue :
3
Database :
OpenAIRE
Journal :
Journal of health, population, and nutrition
Accession number :
edsair.pmid..........b8ec5f0d748e1c74d0604a095108eea1