Sammanfattning

The consumption of milk contaminated with antibiotic-resistant bacteria poses a significant health threat to humans. This study aimed to investigate the prevalence of Enterobacteriaceae producing beta-lactamases (ESBL, MBL, and AmpC) in cow and buffalo milk samples from two Indian states, Haryana and Assam. A total of 401 milk samples were collected from dairy farmers and vendors in the specified districts. Microbiological assays, antibiotic susceptibility testing, and PCR-based genotyping were employed to analyze 421 Gram-negative bacterial isolates. The overall prevalence of beta-lactamase genes was 10% (confidence interval (CI) (7-13)), with higher rates in Haryana (13%, CI (9-19)) compared to Assam (7%, CI (4-11)). The identified beta-lactamase genes in isolates were blaCMY, blaMOX, blaFOX, blaEBC, and blaDHA, associated with AmpC production. Additionally, blaCTX-M1, blaSHV, and blaTEM were detected as ESBL producers, while blaVIM, blaIMP, blaSPM, blaSIM, and blaGIM were identified as MBL producers. Notably, Shigella spp. were the dominant beta-lactamase producers among identified Enterobacteriaceae. This study highlights the presence of various prevalent beta-lactamase genes in milk isolates, indicating the potential risk of antimicrobial-resistant bacteria in dairy products. The presence of beta-lactam resistance raises concern as this could restrict antibiotic options for treatment. The discordance between genotypic and phenotypic methods emphasizes the necessity for comprehensive approaches that integrate both techniques to accurately assess antibiotic resistance. Urgent collaborative action incorporating rational and regulated use of antibiotics across the dairy value chain is required to address the global challenge of beta-lactam resistance.

Nyckelord

antimicrobial resistance; AMR; enterobacteriaceae; beta-lactamase; ESBL; MBL; AmpC; dairy milk; intensification; food safety

Publicerad i

Antibiotics
2023, Volym: 12, nummer: 9, artikelnummer: 1449
Utgivare: MDPI

SLU författare

• Lindahl, Johanna

  • Institutionen för kliniska vetenskaper, Sveriges lantbruksuniversitet
    
  • International Livestock Research Institute (ILRI)
  • Uppsala universitet

Associerade SLU-program

AMR: Bakterier


Globala målen

SDG3 Säkerställa hälsosamma liv och främja välbefinnande för alla i alla åldrar


UKÄ forskningsämne

Mikrobiologi inom det medicinska området
Livsmedelsvetenskap


Publikationens identifierare

DOI: https://doi.org/10.3390/antibiotics12091449

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/126903