This study is evaluating whether screening of a pregnant woman for asymptomatic bacteriuria in each trimester for early detection and treatment of bacteriuria will reduce the incidence of preterm birth in Harare.

Asymptomatic bacteriuria is common in pregnancy. If the disease is not detected early in pregnancy and treated it often progresses to an acute symptomatic disease, pyelonephritis which is associated with adverse pregnancy outcomes including preterm birth.

It is recommended that every woman be screened for asymptomatic bacteriuria by urine culture test at initial antenatal care visit so that the disease is if identified is treated early to prevent preventable complications of the disease in pregnancy. Culture test is expensive and therefore unavailable at several primary care settings especially in low resource settings where majority of pregnant women register and visit for antenatal care. In Zimbabwe antenatal care at primary care clinics is not including screening for asymptomatic bacteriuria. Majority who present with symptoms are empirically treated.

In this study the Griess nitrite test, an effective inexpensive screening test for asymptomatic bacteriuria is used. the test detects nitrite in urine which is associated with presence of nitrate reducing uropathogens, commonly the gram negative bacteria. All the positive samples will then be further tested by culture for bacteria identification, quantification and antibiotic sensitivity. A Randomized controlled trial research design is being used. participants are randomly allocated to intervention group or control group. Urine samples will be collected and tested 3 times for each recruited participant in the intervention arm. treatment will be initiated for positive result according to sensitivity test. Control group will only be subjected to routine existing antenatal care.

Participants will be recruited before 22 weeks gestation and followed on for second contact by 28 weeks and third contact by 36 weeks. Follow up will be stopped on delivery for noting gestation at delivery, whether preterm or term.

Inclusion Criteria:

• Pregnant women registering at study site.
• Woman is able to identify her date of last menstrual period.
• Gestation of pregnancy is between 6 and 22 weeks.
• Woman is asymptomatic for bacteriuria
• Woman voluntarily signs the consent form

Exclusion Criteria:

• Pregnant woman ill and unwell
• Pregnant woman unwilling to sign consent form
• Woman who had antibiotic treatment 2 weeks before recruitment
• Woman on long term antibiotic treatment
• Woman who fails to identify date of last menstrual period
• Woman symptomatic for urinary tract infection

plan to share individual participant information will include sharing culture test results on antibiotic sensitivity for those with positive urine culture results. the in formation shared is intended to assist with effective decision making on selection of the best antibiotic to use to treat asymptomatic bacteriuria.

for the period of study for the protocol As soon as culture results are out

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The investigator will not be aware of study group at analysis stage of results. The assessors of outcome will be blinded to study arm as they analyse data to reduce risk of bias.