Genomic insights into methicillin-resistant staphylococci and mammaliicocci from bulk tank milk of dairy farms in Serbia

Kos, Andrea (avtor), Papić, Bojan (avtor), Golob, Majda (avtor), Avberšek, Jana (avtor), Kušar, Darja (avtor), Ledina, Tijana (avtor), Đorđević, Jasna (avtor), Bulajić, Snežana (avtor)

The potential risk to human and animal health provides a rationale for research on methicillin-resistant staphylococci (MRS) and mammaliicocci (MRM) in dairy herds. Here, we aimed to estimate their occurrence in the bulk tank milk (BTM) samples collected in 2019–2021 from 283 bovine dairy farms in the Belgrade district. We used whole-genome sequencing to characterize the obtained isolates and assess their genetic relatedness. A total of 70 MRS/MRM were recovered, most frequently Staphylococcus haemolyticus and Mammaliicoccus sciuri. Five clusters of 2–4 genetically related isolates were identified and epidemiological data indicated transmission through, e.g., farm visits by personnel or milk collection trucks. Most MRSA isolates belonged to the typical livestock-associated lineage ST398-t034. One MRSA isolate (ST152-t355) harbored the PVL-encoding genes. Since MRS/MRM isolates obtained in this study frequently harbored genes conferring multidrug resistance (MDR), this argues for their role as reservoirs for the spread of antimicrobial resistance genes. The pipeline milking system and total bacterial count >100,000 CFU/mL were significantly associated with higher occurrences of MRS/MRM. Our study confirms that BTM can be a zoonotic source of MRS, including MDR strains. This highlights the urgent need for good agricultural practices and the continuous monitoring of MRS/MRM in dairy farms.

• Jezik: Angleški jezik
• Ključne besede: Staphylococcus aureus, milk, virulence factors, whole genome sequencing
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: VF - Veterinarska fakulteta
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2023
• Št. strani: 19 str.
• Številčenje: Vol. 10, issue 10, [art. no.] 1529
• PID: 20.500.12556/RUL-151615
• UDK: 636.09:616:577
• ISSN pri članku: 2079-6382
• DOI: 10.3390/antibiotics12101529
• COBISS.SI-ID: 167972099
• Datum objave v RUL: 12.10.2023

Gradivo je del revije

• Naslov: Antibiotics
• Skrajšan naslov: Antibiotics
• Založnik: MDPI
• ISSN: 2079-6382
• COBISS.SI-ID: 522975769

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 12.10.2023

Projekti

• Financer: Drugi - Drug financer ali več financerjev
• Številka projekta: BI-RS/23-25-007
• Naslov: Surovo mleko kot potencialni vir večkratno odpornih bakterij in genov za odpornost

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P4-0092
• Naslov: Zdravje živali, okolje in varna hrana