Abstract
Livestock-associated meticillin-resistant Staphylococcus aureus belonging to clonal complex 398 (LA-MRSA CC398) is an important cause of zoonotic infections in several countries, but there is only a single published report of this lineage from the United Kingdom (UK). Here, we describe the isolation of LA-MRSA CC398 from bulk tank milk from five geographically dispersed farms in the UK. Our findings suggest that LA-MRSA CC398 is established in livestock in the UK. Awareness of the potential occupational risks and surveillance in other food-producing animal species should be promoted.
Highlights
Livestock-associated meticillin-resistant Staphylococcus aureus belonging to clonal complex 398 (LA-MRSA CC398) is an important cause of zoonotic infections in several countries, but there is only a single published report of this lineage from the United Kingdom (UK)
Our findings suggest that LA-MRSA CC398 is established in livestock in the UK
During a study, performed from January to July 2012, to detect mecC meticillin-resistant Staphylococcus aureus (MRSA) in dairy cattle in the United Kingdom (UK), ca. 1,500 bulk tank milk samples were supplied by National Milk Laboratories Ltd., (Chippenham, UK)
Summary
First detection of livestock-associated meticillinresistant Staphylococcus aureus CC398 in bulk tank milk in the United Kingdom, January to July 2012. During a study, performed from January to July 2012, to detect mecC meticillin-resistant Staphylococcus aureus (MRSA) in dairy cattle in the United Kingdom (UK), ca. 300 potential MRSA colonies were identified and subjected to PCR testing, yielding a total of seven mecA MRSA isolates from five farms, including three isolates from the same farm. These isolates were found to be mecA, femB-positive by PCR (Table). Antimicrobial susceptibility testing using disk diffusion according to the EUCAST guidelines revealed that all isolates were resistant to tetracycline, and PCR [10] demonstrated the presence of the tetracycline resistance gene tet(M) in all seven, and of tet(K) in three isolates (Table)
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