Antibiotic resistance in the pathogenic foodborne bacteria isolated from raw kebab and hamburger: phenotypic and genotypic study

被引:26
作者
Rajaei, Maryam [1 ]
Moosavy, Mir-Hassan [1 ]
Gharajalar, Sahar Nouri [2 ]
Khatibi, Seyed Amin [1 ]
机构
[1] Univ Tabriz, Fac Vet Med, Dept Food Hyg & Aquat, Tabriz, Iran
[2] Univ Tabriz, Fac Vet Med, Dept Pathobiol, Tabriz, Iran
关键词
Foodborne pathogens; Kebab; Hamburger; Antibiogram; Antibiotic-resistance genes; SPECTRUM BETA-LACTAMASE; FOOD-BORNE PATHOGENS; STAPHYLOCOCCUS-AUREUS; ANTIMICROBIAL RESISTANCE; ESCHERICHIA-COLI; LISTERIA-MONOCYTOGENES; MEAT-PRODUCTS; MOLECULAR CHARACTERIZATION; PREVALENCE; SUSCEPTIBILITY;
D O I
10.1186/s12866-021-02326-8
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
Background In recent years, interest in the consumption of ready-to-eat (RTE) food products has been increased in many countries. However, RTE products particularly those prepared by meat may be potential vehicles of antibiotic-resistance foodborne pathogens. Considering kebab and hamburger are the most popular RTE meat products in Iran, this study aimed to investigate the prevalence and antimicrobial resistance of common foodborne pathogens (Escherichia coli, Salmonella spp., Staphylococcus aureus, and Listeria monocytogenes) in raw kebab and hamburger samples collected from fast-food centers and restaurants. Therefore, total bacterial count (TBC), as well as the prevalence rates and antibiogram patterns of foodborne pathogens in the samples were investigated. Also, the presence of antibiotic-resistance genes (bla(SHV), bla(TEM,)bla(Z), and mecA) was studied in the isolates by PCR. Results The mean value of TBC in raw kebab and hamburger samples was 6.72 +/- 0.68 log CFU/g and 6.64 +/- 0.66 log CFU/g, respectively. E. coli had the highest prevalence rate among the investigated pathogenic bacteria in kebab (70%) and hamburger samples (48%). Salmonella spp., L. monocytogenes, and S. aureus were also recovered from 58, 50, and 36% of kebab samples, respectively. The contamination of hamburger samples was detected to S. aureus (22%), L. monocytogenes (22%), and Salmonella spp. (10%). In the antimicrobial susceptibility tests, all isolates exhibited high rates of antibiotic resistance, particularly against amoxicillin, penicillin, and cefalexin (79.66-100%). The bla(TEM) was the most common resistant gene in the isolates of E. coli (52.54%) and Salmonella spp. (44.11%). Fourteen isolates (23.72%) of E. coli and 10 isolates (29.41%) of Salmonella spp. were positive for bla(SHV). Also, 16 isolates (55.17%) of S. aureus and 10 isolates (27.27%) of L. monocytogenes were positive for mecA gene. Conclusions The findings of this study showed that raw kebab and hamburger are potential carriers of antibiotic-resistance pathogenic bacteria, which can be a serious threat to public health.
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页数:16
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