الفهرس 
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Abstract
Asymptomatic bacteriuria is a major risk factor for the development of urinary tract infection (UTI). During pregnancy, many changes occur in the structure and function of the urinary tract that predispose pregnant women to upper UTI. Although there is a small risk of development of acute episodes of UTI in early pregnancy, there will be a substantial increase risk (to 30% to 60%) during the last trimester (Kennedy, 2001).
Maclean AB (2001) found that 6% of pregnant women had asymptomatic bacteriuria and this was associated with increased prematurity and perinatal mortality compared with healthy pregnant women. In general, the prevalence of asymptomatic bacteriuria in pregnancy was found to be 2% to 12%.
Failure to treat bacteriuria during pregnancy increase the risk of development of acute pyelonephritis by 25% and may result in complications, such as preterm labour, transient renal failure, acute respiratory distress syndrome, sepsis, shock and haematological abnormalities. Woman with untreated UTI during their third trimester of pregnancy are at risk of delivering a child with mental retardation or developmental delay (Stein G and Funfstuck R, 2000).
This study includes 100 primigrvid women during midtrimester from those attending Bolak El dakror hospital obstetric out patient clinic. Urine culture was taken from all the patient and urine culture and sensitivity was done for the positive cases of significant bacteruria (positive cases of asymptomatic bacteriuria).
Among the 100 primigrvid women included in this study, 8 had bacteriuria giving prevalence of 8%. this study the mean of age of the studied cases was 25.4 years, with a standard deviation of 1.75 years (Table 2). The antibiotic sensitivity patterns showed that most of the bacterial isolates were sensitive to imipenem, cefoperazone, and nitrofurantoin. Conclusion, this study showed that 8% of the pregnant women examined had a positive urine culture without any symptoms of UTI. Hence, it is important that pregnant women are screened for asymptomatic bacteriuria at the first antenatal visit.