Antibiotic resistance and detection of the sul2 gene in urinary isolates of Escherichia coli in patients from Brazil.

Introduction: The present study aimed to assess the antibiotic resistance profiles and detect the presence of the sul2 gene in sulfamethoxazole-susceptible and resistant isolates of Escherichia coli obtained from outpatients and inpatients with urinary tract infections.

Methodology: The resistance profiles of 739 strains were assessed and the presence of the sul2 gene in 100 isolates was tested.

Results: The antibiotics with the highest resistance rates were ampicillin (57.

[New selective indicator medium for detection of Aeromonas and Plesiomonas: UNISC agar].

We evaluated a new selective indicator medium (UNISC Agar) for isolation of classical enteropathogens, Aeromonas spp and Plesiomonas shigelloides. The xylose fermentation capacity is indicated by a yellow color (fermenting agents) or blue (no fermenting agent). This, together with the oxidase test, establishes it as an indicator for detecting Aeromonas and Plesiomonas shigelloides.