Antibiotic resistance of pathogens causing community-acquired urinary tract infections in pregnant women with diabetes mellitus

BACKGROUND: Urinary tract infections are among the most common infectious diseases in women and are the most frequent cause of infectious complications of pregnancy, especially in pregnant women with type 1 diabetes mellitus. For adequate treatment of urinary tract infections in pregnant women with type 1 diabetes mellitus, it is requisite to regularly monitor antimicrobial resistance of uropathogens in order to update empirical schemes of antibacterial therapy.

AIM: The aim of this study was to determine the spectrum of uropathogens and the activity of antibacterial drugs against pathogens of community-acquired urinary tract infections in pregnant women with type 1 diabetes mellitus or without diabetes mellitus.

MATERIALS AND METHODS: We analyzed 91 strains obtained from pregnant women with or without type 1 diabetes mellitus. The sensitivity of microorganisms to all antibacterial drugs was evaluated by the disk diffusion method.

RESULTS: In the group of pregnant women with type 1 diabetes mellitus in the etiological structure of uropathogens, enterobacteria accounted for 84.8%, Escherichia coli (71.7%) and Klebsiella spp. (13.0%) being the most common. In the group of pregnant women without diabetes mellitus in the structure of uropathogens, enterobacteria accounted for 75.6%, while E. coli was the causative agent of urinary tract infections in 62.2% of women and Klebsiella spp. in 11.1%. Gram-positive uropathogens were isolated much less frequently. In the group of pregnant women with type 1 diabetes mellitus, piperacillin/tazobactam, carbapenems, nitrofurantoin, and amikacin (100%), as well as fosfomycin and gentamicin (97%), had the maximum antibacterial activity against E. coli. The sensitivity of E. coli to various cephalosporins varied in the range of 84.9–90.9%. In the group of pregnant women without diabetes mellitus and with urinary tract infections, the highest E. coli sensitivity rates were observed for piperacillin/tazobactam, carbapenems, fosfomycin, nitrofurantoin, gentamicin, and amikacin (100%). E. coli sensitivity to second and third generation cephalosporins varied in the range of 75.0–82.1%, and it was 96.4% to cefepime. Ampicillin and amoxicillin/clavulanate demonstrated the least activity against E. coli in the two study groups. The rate of extended spectrum beta-lactamase production by uropathogenic enterobacteria in pregnant women with type 1 diabetes mellitus was 15.8% of the strains, and in pregnant women without diabetes mellitus, it was 18.1%.

CONCLUSIONS: There were no significant differences in the activity of antibacterial drugs against the pathogens of community-acquired urinary tract infections in pregnant women with or without diabetes mellitus.