Objective: To determine the frequency, risk factors, and common causative agents of asymptomatic bacteriuria in pregnant women attending antenatal clinic at JPMC Karachi. Study Design: Cross sectional study. Place and Duration of Study: Jinnah Postgraduate Medical Center Karachi, from Jul 2014 to Sep 2015. Material and Methods: One hundred seventy seven women participated according to pre-determined inclusion criteria. All of them underwent urine examination on midstream urine and urine was

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... ured in case of a positive test (>10 leukocytes per microliter of urine). Results: Incidence of asymptomatic bacteriuria was 12.4% of the 177 women. Low socioeconomic status was found to be the only statistically significant risk factor associated. The most common causative agent was E. coli. Conclusion: Pregnant women belonging to lower socioeconomic status are more likely to have asymptomatic bacteriuria. The recommendations stemming out of the study include complete examination of urine of all pregnant women to be carried out at first antenatal visit and culture of urine to follow if indicated.