Antimicrobial resistance testing showed a very important variety
when comparing ESBL and non-ESBL producing strains of
E. coli (Table 3). The mean percentages of resistance to commonly
used antibiotics measured in the ESBL-producing E. coli
were remarkably higher than the antimicrobial resistance percentages
displayed by non-ESBL producing E. coli isolates. Indeed, all
ESBL-producing E. coli showed higher resistance rates to aminoglycosides,
T/S and fluoroquinolones. This finding suggests that
ESBL-encoding genes and genes encoding other classes of antibiotics
were on the same plasmids and therefore spread together
[17,18]. Fluoroquinolones and T/S are often used to treat UTIs
caused by Enterobacteriaceae in various clinical settings