Detection of Salmonella spp. in retail raw food samples from Vietnam and characterization of their antibiotic resistance.
A study was conducted to examine the levels of Salmonella spp. contamination in raw food samples, including chicken, beef, pork, and shellfish, from Vietnam and to determine their antibiotic resistance characteristics. A total of 180 samples were collected and examined for the presence of Salmonella spp., yielding 91 Salmonella isolates. Sixty-one percent of meat and 18% of shellfish samples were contaminated with Salmonella spp. Susceptibility of all isolates to a variety of antimicrobial agents was tested, and resistance to tetracycline, ampicillin/amoxicillin, nalidixic acid, sulfafurazole, and streptomycin was found in 40.7%, 22.0%, 18.7%, 16.5%, and 14.3% of the isolates, respectively. Resistance to enrofloxacin, trimethoprim, chloramphenicol, kanamycin, and gentamicin was also detected (8.8 to 2.2%). About half (50.5%) of the isolates were resistant to at least one antibiotic, and multiresistant Salmonella isolates, resistant to at least three different classes of antibiotics, were isolated from all food types. One isolate from chicken (serovar Albany) contained a variant of the Salmonella genomic island 1 antibiotic resistance gene cluster. The results show that antibiotic resistance in Salmonella spp. in raw food samples from Vietnam is significant.
Van
Thi Thu Hao
TT
Biotechnology and Environmental Biology, School of Applied Sciences, RMIT University, Bundoora West Campus, Bundoora, Melbourne, Victoria 3083, Australia.
Moutafis
George
G
Istivan
Taghrid
T
Tran
Linh Thuoc
LT
Coloe
Peter J
PJ
D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D024881:Drug Resistance, Bacterial / Q000235:genetics*; D004352:Drug Resistance, Microbial; D005506:Food Contamination / Q000032:analysis*; D005516:Food Microbiology; D008460:Meat / Q000382:microbiology*; D008461:Meat Products / Q000382:microbiology; D008826:Microbial Sensitivity Tests; D012475:Salmonella / Q000145:classification / Q000187:drug effects* / Q000235:genetics / Q000302:isolation & purification; D014744:Vietnam
D000900:Anti-Bacterial Agents