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• W4200515914 endingPage "109512" @default.
• W4200515914 startingPage "109512" @default.
• W4200515914 abstract "Staphylococcus aureus is an important food-related pathogen associated with bacterial poisoning that is difficult to treat due to its multidrug resistance. The cfr and lsa(E) genes both cause multiple drug resistance and have been identified in numerous Staphylococcus species, respectively. In this study, we found that a methicillin-resistant S. aureus (MRSA) strain, 2868B2, which was isolated from a sample of frozen dumplings in Hangzhou in 2015, co-carried these two different multidrug resistance genes. Further analysis showed that this strain was resistant to more than 18 antibiotics and expressed high-level resistance to florfenicol, chloramphenicol, clindamycin, tiamulin, erythromycin, ampicillin, cefepime, ceftazidime, kanamycin, streptomycin, tetracycline, trimethoprim-sulfamethoxazole and linezolid (MIC = 8 μg/mL). Whole genome sequencing was performed to characterize the genetic environment of these resistance genes and other genomic features. The cfr gene was located on the single plasmid p2868B2 (39,159 bp), which demonstrated considerable similarity to many plasmids previously identified in humans and animals. p2868B2 contained the insertion sequence (IS) element IS21-558, which allowed the insertion of cfr into Tn558 and played an important role in the mobility of cfr. Additionally, a novel multidrug resistance region (36.9 kb) harbouring lsa(E) along with nine additional antibiotic resistance genes (ARGs) (aadD, aadE, aacA-aphD, spc, lnu(B), lsa(E), tetL, ermC and blaZ) was identified. The multidrug resistance region harboured four copies of IS257 that were active and can mediate the formation of four circular structures containing ARGs and ISs. In addition, genes encoding various virulence factors and affecting multiple cell adhesion properties were identified in the genome of MRSA 2868B2. This study confirmed that the cfr and lsa(E) genes coexist in one MRSA strain and the presence of plasmid and IS257 in the multi-ARG cluster can promote both ARG transfer and dissemination. Furthermore, the presence of so many ARGs and virulence genes in food-related pathogens may seriously compromise the effectiveness of clinical therapy and threaten public health, its occurrence should pay public attention and the traceability of these genes in food-related samples needs further surveillance." @default.
• W4200515914 created "2021-12-31" @default.
• W4200515914 creator A5002877468 @default.
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• W4200515914 date "2022-02-01" @default.
• W4200515914 modified "2023-10-14" @default.
• W4200515914 title "Presence and characterization of methicillin-resistant Staphylococcus aureus co-carrying the multidrug resistance genes cfr and lsa(E) in retail food in China" @default.
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