Antimicrobials resistance patterns and the presence of stx1, stx2 and "eae" in "Escherichia coli"

Assumpção, Gustavo Lacerda HomemCardozo, Marita VedovelliBeraldo, Lívia GerbaseMaluta, Renato ParizSilva, Joviany TalitaAvila, Fernando AntonioMcIntosh, DouglasRigobelo, Everlon Cid

The objectives of this study were to investigate whether antimicrobial resistance (AMR) or the presence of resistance genes was associated with the occurrence of the virulence genes, stx1, stx2 and eae. Three virulence genes and 11 AMR phenotypes were examined using polymerase chain reaction (PCR) and antimicrobial susceptibility tests. From 800 samples collected in this study, 561 samples were isolates E. coli strains , being: 90 (16.0%) carriers of stx1, 97 (17.3%) of stx2 and 45 (8.0%) of eae genes singly. Thirty seven (6.6%) isolates were carriers of stx1 and stx2, 110 (19.6%) were carriers of stx1 and eae and 67 (11.9%) were carriers of stx2 and eae. The most common virulence gene detected was stx1 followed by stx2. The findings showed no relationship between presence of virulence factors and antimicrobial resistance. Also was not found relationship between serogroup and virulence factors.(AU)

1. antimicrobial resistance
2. Escherichia coli
3. STEC
4. resistência antimicrobiana
5. sorogrupos
6. vaca leiteira
7. serogroups
8. dairy cow