Resistance patterns of diversified phylogroups of Escherichia coli associated with mothers having history of preterm births in Pakistan

Abstract

Objective: Urinary tract infections (UTIs) are caused by extraintestinal pathogenic Escherichia coli (ExPEC), and are one of the key predictors of preterm births. In the light of this fact, present study was conducted to determine the predominant Escherichia coli (E. coli) phylotypes and their associated antibiotic susceptibility patterns, isolated from pregnant mothers with the history of preterm births.

Methods: Forty seven E. coli strains were isolated out of a total of 80 urine samples of pregnant women. The isolates were phylotyped and further screened for the presence of Clonal group A. Moreover, Antimicrobial susceptibility testing and screening for Extended Spectrum Beta Lactamase (ESBL) producing strains were also performed.

Results: Among the 47 isolates, phylogroup B2 was found to be highly prevalent (45%), followed by group D (23%), B1 (10.64%), A (6.38%), E (6.38%), cryptic clade I (4.25%) and F (2.13%). Two isolates belonged to CgA and 41 (87.23%) isolates were found to be multidrug-resistant. Out of nine antibiotics tested in the study, the isolates displayed high resistance to Ampicillin (82.6%), Sulphamethoxazole (65.22%), Nalidixic acid (60.87%), Sulphamethoxazole-Trimethoprim, Doxycycline and Erythromycin (56.52% each). In total, 8 (17.02%) of the isolates were found to be ESBL positive.

Conclusions: The prevalence of infections caused by virulent and highly drug resistant E. coli isolates constitute a risk of developing preterm birth complications in pregnant women and requires the selection of appropriate antibiotics for the treatment of infections caused during pregnancy.

• Antibiotic resistance
• extraintestinal pathogenic Escherichia coli
• extended spectrum beta lactamases
• prevalence
• phylogroups

Acknowledgements

Authors are very thankful to COMSATS Institute of Information Technology, Islamabad for provision of support in order to complete the project. We are also grateful to Dr. Patricia Martin from University of Toulouse, France for giving constructive comments and editing the manuscript.

Declaration of interest

The authors declare that they have no competing interests.

Supplementary material available online