[Effectiveness of systematic investigation for Group B Streptococcus in urine samples to identify colonized pregnant women].
OBJECTIVE
To evaluate the effectiveness of systematic investigation for Group B Streptococcus (GBS) in urine samples to detect colonization in pregnant women.


METHODS
This study included 1036 pregnant women whose urine samples were cultured in our laboratory during 2006. Any colony consistent with GBS was identified in urine or in rectovaginal samples submitted for screening of GBS colonization.


RESULTS
GBS was recovered in urine samples from 111 of the 1036 women (10.7%), and in 77 of them bacterial count was <10(4) colony forming units/mL. Screening for GBS in rectovaginal samples was performed in 841 of the 925 pregnant women who did not have GBS bacteriuria (10.1% positive results) and in 61 of the 111 with GBS bacteriuria (60.7% positive results; no significant differences were found when results were stratified by colony count). Estimated rectovaginal colonization was 15.4%, and colonization exclusively detected in urine was 4.2%. Only 30% of pregnant women with GBS bacteriuria, but negative antenatal screening cultures who were admitted to our hospital for delivery received intrapartum antibiotic prophylaxis.


CONCLUSIONS
Systematic investigation of the presence of GBS in urine samples from pregnant women improves the detection of carriers who are candidates for receiving intrapartum prophylaxis to prevent perinatal GBS infection, when compared with rectovaginal screening culture in the last trimester of gestation alone.
Centelles-Serrano
María José
MJ
Hospital de Tortosa Verge de la Cinta, Tarragona, España.
Pérez-Moreno
Mar Olga
MO
Llovet-Lombarte
María Isabel
MI
Cortell-Ortolá
María
M
Jardí-Baiges
Anna Maria
AM
Buj-González
José Ignacio
JI
D000293:Adolescent; D000328:Adult; D019072:Antibiotic Prophylaxis; D001437:Bacteriuria / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology / Q000382:microbiology*; D002353:Carrier State / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology / Q000382:microbiology / Q000652:urine; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D018445:Infectious Disease Transmission, Vertical / Q000517:prevention & control*; D008403:Mass Screening / Q000379:methods* / Q000706:statistics & numerical data; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology / Q000652:urine; D011263:Pregnancy Trimester, Third; D015397:Program Evaluation; D011446:Prospective Studies; D012007:Rectum / Q000382:microbiology; D013030:Spain / Q000453:epidemiology; D013290:Streptococcal Infections / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology / Q000517:prevention & control* / Q000635:transmission / Q000652:urine; D013292:Streptococcus agalactiae / Q000302:isolation & purification*; D014552:Urinary Tract Infections / Q000175:diagnosis / Q000188:drug therapy / Q000453:epidemiology / Q000652:urine*; D014556:Urine / Q000382:microbiology*; D014621:Vagina / Q000382:microbiology; D055815:Young Adult