International journal of food microbiology | VOL. 371
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Prevalence and characterization of Salmonella from meat in slaughterhouses in Hangzhou, China.

Publication Date Jun 16, 2022

Abstract

Salmonella is an essential food-borne pathogenic microorganism. Humans could get infected by consuming of Salmonella-contaminated foods, especially contaminated meat. In this study, a total of 580 retail meat samples (280 pork, 240 chicken, and 60 goose) were collected from slaughterhouses in Hangzhou to determine the prevalence and antimicrobial susceptibility patterns of Salmonella. Isolates were characterized by serotyping, PFGE (Pulsed-field gel electrophoresis), Polymerase chain reaction (PCR), and antibiotic susceptibility testing. The rates of Salmonella-positive pork, chicken, and goose samples were 21.1% (n=59), 10.4% (n=25) and 10.0% (n=6), respectively. The prevalence of Salmonella was 15.5% in slaughterhouses. Thirteen different Salmonella serovars were identified, and 6 isolates could not be identified. The most commonly prevalent serovars are Salmonella Rissen (S. Rissen) (n=20, 22.2%), S. Derby (n=16, 17.8%) and S. Typhimurium (n=12, 13.3%). The detection rate of the remaining serovars ranged from 1.1%-11.11%. All Derby, Corvallis, and Kentucky strains were from pork. Seventy-two isolates (80.0%) showed drug resistance (DR) to at least one antibiotics, 19 (21.1%) were multi-drug resistant strains, 2 (2.2%) showed seven or more. The detection rate of Trimethoprim/Sulfamethoxazole-resistance (70.0%) was highest, followed by Ampicillin (55.6%). Salmonella resistance was found related to serovar and origin. The positive rates of DR gene sul1, sul2, sul3, class I integrons and blaTEM were 92.2%, 95.6%, 86.7%, 83.3%...

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Related Gene
Pulsed-field Gel Electrophoresis
Pulsed-field Gel Electrophoresis Patterns
Kentucky Strains
Drug Resistance
Drug Resistance Gene
Antibiotic Susceptibility Testing
Multi-drug Resistant Strains
Main Clusters
Polymerase Chain Reaction

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