Occurrence and characterization of rmtB-harbouring Salmonella and Escherichia coli isolates from a pig farm in the UK.
J Antimicrob Chemother
; 79(6): 1329-1336, 2024 06 03.
Article
in En
| MEDLINE
| ID: mdl-38629139
ABSTRACT
OBJECTIVES:
To characterize and elucidate the spread of amikacin-resistant Enterobacteriaceae isolates from environmental samples on a pig farm in the UK, following the previous identification of index Salmonella isolates harbouring the rmtB gene, a 16S rRNA methylase.METHODS:
Environmental samples were collected during two visits to a pig farm in the UK. Isolates were recovered using selective media (amikacin 128 mg/L) followed by real-time PCR and WGS to analyse rmtB-carrying Salmonella and Escherichia coli isolates.RESULTS:
Salmonella and E. coli isolates harbouring the rmtB gene were detected at both farm visits. All Salmonella isolates were found to be monophasic S. enterica serovar Typhimurium variant Copenhagen of ST34. rmtB-harbouring E. coli isolates were found to be one of three STs ST4089, ST1684 and ST34. Long-read sequencing identified the rmtB gene to be chromosomally located in Salmonella isolates and on IncFII-type plasmids in E. coli isolates. The results showed the rmtB gene to be flanked by IS26 elements and several resistance genes.CONCLUSIONS:
We report on the occurrence of rmtB-harbouring Enterobacteriaceae on a pig farm in the UK. rmtB confers resistance to multiple aminoglycosides and this work highlights the need for surveillance to assess dissemination and risk.
Full text:
1
Database:
MEDLINE
Main subject:
Salmonella
/
Escherichia coli
/
Farms
/
Methyltransferases
/
Anti-Bacterial Agents
Limits:
Animals
Country/Region as subject:
Europa
Language:
En
Journal:
J Antimicrob Chemother
Year:
2024
Type:
Article
Affiliation country:
United kingdom