Image_3_Analysis of Antimicrobial Resistance in Non-typhoidal Salmonella Collected From Pork Retail Outlets and Slaughterhouses in Vietnam Using Whole Genome Sequencing.TIF
Non-typhoidal salmonella (TS) remains a significant health burden worldwide. In Vietnam, pork accounts for 70% of the total meat consumed, and contamination with Salmonella is high. High levels of antimicrobial resistance (AMR) have emerged among porcine NTS and of particular concern is the emergence of colistin resistance, a “last defense” antibioic against multi-drug resistant (MDR) Gram-negative pathogens. This study aimed to investigate the antibiotic susceptibility of 69 NTS isolates collected from the pork retail outlets and slaughterhouses in Vietnam during 2014 a nd 2018/19. Phenotypic testing and whole genome sequencing was used to assess the serotype and AMR gene profiles of the 69 NTS isolates. Seventeen different serotypes were identified, of which S. enterica subsp enterica serotype Typhimurium was the most common followed by S. ser. Rissen, S. ser. London, S. ser. Anatum, and S. ser. Derby. Phenotype AMR was common with 41 (59.4%) isolates deemed MDR. MDR strains were most common in slaughterhouses (83%) and supermarkets (75%) and lowest in traditional markets (38%) and convenience stores (40%). Colistin resistance was identified in 18 strains (15 resistant, three intermediate) with mcr-1 identified in seven isolates (S. ser. Meleagridis, S. Rissen, S. Derby) and mcr-3 in two isolates (S. Typhimurium). This includes the first mcr positive S. Meleagridis to our knowledge. Surprisingly, boutique stores had high levels (60%) of MDR isolates including 5/20 isolates with mcr-1. This study demonstrates that pork from modern retail stores classed as supermarkets or boutique (with pork claiming to be high quality, traceable, environmentally friendly marketed toward higher income consumers) still contained NTS with high levels of AMR.
History
Usage metrics
Categories
- Animal Systematics and Taxonomy
- Veterinary Anaesthesiology and Intensive Care
- Veterinary Anatomy and Physiology
- Veterinary Diagnosis and Diagnostics
- Veterinary Epidemiology
- Veterinary Immunology
- Veterinary Medicine
- Veterinary Microbiology (excl. Virology)
- Veterinary Parasitology
- Veterinary Pathology
- Veterinary Pharmacology
- Veterinary Surgery
- Veterinary Virology
- Veterinary Sciences not elsewhere classified
- Animal Physiology - Biophysics
- Animal Physiology - Cell
- Animal Physiology - Systems
- Animal Behaviour
- Animal Cell and Molecular Biology
- Animal Developmental and Reproductive Biology
- Animal Immunology
- Animal Neurobiology
- Animal Physiological Ecology
- Animal Structure and Function