Prevalence and characterisation of methicillin-resistant staphylococci from bovine bulk tank milk in England and Wales.
J Glob Antimicrob Resist
; 22: 139-144, 2020 09.
Article
em En
| MEDLINE
| ID: mdl-32006753
ABSTRACT
OBJECTIVES:
To investigate the prevalence and characteristics of methicillin-resistant staphylococci on dairy farms in England and Wales including zoonotic MRSA.METHODS:
Bulk tank milk was sampled from 363 dairy farms in 2015-2016 and methicillin-resistant staphylococci were isolated by salt broth enrichment and plating on MRSA Brilliance selective agar. Isolates were characterised through antimicrobial susceptibility testing and whole-genome sequencing.RESULTS:
Methicillin-resistant staphylococci were isolated from â¼5% of dairy farms and belonged to six different species, Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus lentus, Staphylococcus saprophyticus, Staphylococcus fleurettii and Staphylococcus sciuri. Whole-genome sequencing revealed a large variety of antimicrobial resistance genes and SCCmec elements were present, including mecA and mecC alleles. Potentially zoonotic methicillin-resistance S. aureus were found at a low prevalence (0.83% of sampled dairy farms). Whole-genome sequencing also provided evidence for the mobility of a primordial mec gene complex, independently of a SCCmec element, which appears to have been acquired by S. saprophyticus from S. fleurettii.CONCLUSIONS:
These data give new insight into the epidemiology of veterinary methicillin-resistant staphylococci to inform future surveillance and zoonotic risk evaluation. Our data indicate that MRSA has likely decreased in prevalence since earlier survey work in England and Wales during 2011-12 and highlights the diversity of methicillin resistance and other resistance determinants among bovine-associated staphylococci with implications for veterinary and human medicine.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Staphylococcus
/
Resistência a Meticilina
/
Leite
Tipo de estudo:
Prevalence_studies
/
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
Europa
Idioma:
En
Revista:
J Glob Antimicrob Resist
Ano de publicação:
2020
Tipo de documento:
Article