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Faculty have requested this content not be shared on social media
CME Credit Offered
CME Credit Offered
Abstract Award
Abstract Award
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Poster Session 3

(721) Urine Culture Speciation During Pregnancy and Association with Maternal Attributes and Neonatal Outcomes

Friday, January 31, 2025
10:30 AM – 12:30 PM  
Objective: Urine culture(UC) is commonly ordered during pregnancy for urinary tract infection(UTI) symptoms or abdominopelvic pain. Little is known about the positivity rate of UC during pregnancy or associated maternal and neonatal outcomes. We aimed to assess the rate of positivity of UCs, and to assess maternal attributes and neonatal outcomes associated with different speciations.

Study Design: This is a retrospective study of pregnant patients who had a UC performed in our hospital system in non-ambulatory settings from 2013-2022. Patients with UCs were classified as 1) always negative (< 10k colony forming units-CFU), 2) ever positive for GBS ( >10k CFU) or UTI-causing microbes ( >100k CFU) or 3) ever positive for non-UTI microbes ( >100k CFU). Maternal characteristics of age, insurance, race, parity, language, BMI, chronic hypertension(cHTN), hypertensive disorders of pregnancy(HDP), gestational diabetes(GDM), and pregestational diabetes were compared between the 3 groups using chi-square or ANOVA. Pregnancy outcomes of preterm birth(PTB), small for gestational age(SGA), mode of delivery, and neonatal intensive care unit(NICU) admission were also compared.

Results: 19,698 patients had a UC performed. The ever positive rate for GBS/UTI was 3.3% in patients with 1 UC, increasing to 18% among patients with ≥7 UC(Fig 1). Statistically significant differences across groups were noted in age, insurance, race, parity, language, BMI, and smoking(Table 1). There were also significant differences for cHTN, HDP, pregestational diabetes, PTB, NICU admission and SGA (Table 1). There was no statistical difference between groups for mode of delivery.

Conclusion: This is one of the first studies to classify rate of positivity by UC speciation during pregnancy. Maternal attributes were significantly different between groups, suggesting a need for further exploration of the basis of these differences. Surprisingly, PTB was more common in the always negative UC group compared to the positive UC groups. Thus, more studies are needed to understand relationships between positive UC, sociodemographics, and obstetric outcomes.