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Đorđević J, Ledina T, Golob M, Mohar Lorbeg P, Čanžek Majhenič A, Bogovič Matijašić B, Bulajić S. Safety evaluation of enterococci isolated from raw milk and artisanal cheeses made in Slovenia and Serbia. FOOD SCI TECHNOL INT 2023; 29:765-775. [PMID: 35912485 DOI: 10.1177/10820132221117870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Enterococci represent a significant part of the non-starter LAB microbiota of artisanal cheeses produced mainly from raw milk. Common approaches to safety evaluation of enterococci isolates include assessment of antimicrobial resistance and virulence potential. Hence, a collection of 47 (n = 22, Serbia; n = 25, Slovenia) dairy enterococcal isolates, of which E. faecalis (n = 28), E. faecium (n = 11), E. durans (n = 5), E. casseliflavus (n = 2), and E. gallinarum (n = 1), was analyzed. The susceptibility to 12 antimicrobials was tested using a broth microdilution method, and the presence of the selected antimicrobial resistance and virulence genes was investigated using PCR. Isolates were resistant to tetracycline (TET) (25.5%), erythromycin (ERY) (17.0%), gentamycin and chloramphenicol (CHL) (∼6%). No resistance to ampicillin (AMP), ciprofloxacin (CIP), daptomycin (DAP), linezolid (LZD), teicoplanin (TEI), tigecycline (TGC) and vancomycin (VAN) was detected. Among all the resistance determinants analyzed, ermB gene was detected most frequently. All 10 virulence genes analyzed were detected with a distribution of cpd (72.3%), cob and ccf (70.2%), gelE (68.1%), hyl (59.6%), agg (53.2%) and esp (46.8%). The genes encoding cytolysin (cylA, cylM and cylB) were amplified to a lesser extent (21.3%, 21.3% and 12.8%, respectively). However, due to the limited number of enterococci isolates analyzed in the present study, further studies are still required in order to better document the safety status of dairy enterococci.
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Affiliation(s)
- Jasna Đorđević
- Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | - Tijana Ledina
- Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
| | - Majda Golob
- Veterinary Faculty, Institute of Microbiology and Parasitology, University of Ljubljana, Ljubljana, Slovenia
| | - Petra Mohar Lorbeg
- Biotechnical Faculty, Institute of Dairy Science and Probiotics, Ljubljana, Slovenia
| | | | | | - Snežana Bulajić
- Faculty of Veterinary Medicine, University of Belgrade, Belgrade, Serbia
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Li XS, Qi Y, Li PH, Xue JZ, Li XY, Muhammad I, Li YZ, Zhu DM, Ma Y, Kong LC, Ma HX. Genetic characterization of MDR genomic elements carrying two aac(6')- aph(2″) genes in feline-derived clinical Enterococcus faecalis isolate. Front Microbiol 2023; 14:1191837. [PMID: 37577435 PMCID: PMC10413266 DOI: 10.3389/fmicb.2023.1191837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 07/10/2023] [Indexed: 08/15/2023] Open
Abstract
Multidrug-resistant Enterococcus faecalis (E. faecalis) often cause intestinal infections in cats. The aim of this study was to investigate a multidrug-resistant E. faecalis isolate for plasmidic and chromosomal antimicrobial resistance and their genetic environment. E. faecalis strain ESC1 was obtained from the feces of a cat. Antimicrobial susceptibility testing was carried out using the broth microdilution method. Conjugation experiments were performed using Escherichia coli and Staphylococcus aureus as receptors. Complete sequences of chromosomal DNA and plasmids were generated by whole genome sequencing (WGS) and bioinformatics analysis for the presence of drug resistance genes and mobile elements. Multidrug-resistant E. faecalis ESC1 contained a chromosome and three plasmids. The amino acid at position 80 of the parC gene on the chromosome was mutated from serine to isoleucine, and hence the amino acid mutation at this site led to the resistance of ESC1 strain to fluoroquinolones. Eleven antibiotic resistance genes were located on two plasmids. We identified a novel composite transposon carrying two aminoglycoside resistance genes aac(6')-aph(2″). This study reported the coexistence of a novel 5.4 kb composite transposon and a resistance plasmid with multiple homologous recombination in an isolate of E. faecalis ESC1. This data provides a basis for understanding the genomic signature and antimicrobial resistance mechanisms of this pathogen.
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Affiliation(s)
- Xue-Song Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Yu Qi
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Peng-hui Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Jun-ze Xue
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Xuan-yu Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Inam Muhammad
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
- Department of Zoology, Shaheed Benazir Bhutto University, Sheringal, Pakistan
| | - Ya-zhuo Li
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Dao-mi Zhu
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Ying Ma
- Liaoyuan Animal Disease Prevention and Control Center, Liaoyuan, China
| | - Ling-Cong Kong
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
| | - Hong-Xia Ma
- Department of Veterinary Medicine, College of Animal Science and Technology, Jilin Agricultural University, Changchun, China
- The Key Laboratory of New Veterinary Drug Research and Development of Jilin Province, Jilin Agricultural University, Changchun, China
- The Engineering Research Center of Bioreactor and Drug Development, Ministry of Education, Jilin Agricultural University, Changchun, China
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Antimicrobial Resistance in Veterinary Medicine and Public Health. Animals (Basel) 2022; 12:ani12233253. [PMID: 36496774 PMCID: PMC9741329 DOI: 10.3390/ani12233253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 11/18/2022] [Indexed: 11/25/2022] Open
Abstract
Animal productions, and populations, have been rapidly expanding over the last decades, forcing the ever-closer coexistence of human beings and domestic animals on our yet "narrow" planet [...].
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