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.