What question did this study set out to answer?

This case report aims to detail an unusual infection caused by Citrobacter koseri during pregnancy and its management.

March 27, 2026Open Access

An Unusual Case of Citrobacter koseri Infection During Pregnancy at 27 Weeks: A Case Report and Literature Review

MAMario AssenzaUniversity of Padua MCMichele CaramiaOspedale di Mirano JWJ WabersichOspedale di Mirano

Key Points

This case report aims to detail an unusual infection caused by Citrobacter koseri during pregnancy and its management.
Early prenatal screening conducted at 26 + 6 weeks
Culture-guided IV ceftazidime treatment used
Multidisciplinary management implemented to prevent complications
Citrobacter koseri eradicated without maternal or fetal compromise
Prevented vertical transmission and neonatal CNS complications
Resulted in healthy term delivery with Apgar scores of 9/10

Abstract

ABSTRACT Early prenatal screening at 26 + 6 weeks detected Citrobacter koseri vaginal colonization in an asymptomatic high‐risk gravida. Culture‐guided IV ceftazidime (susceptible per CLSI testing) eradicated the pathogen without maternal/fetal compromise. Multidisciplinary management prevented vertical transmission, neonatal CNS complications, and yielded a healthy term delivery (Apgar 9/10). Emphasizes susceptibility‐directed antimicrobial stewardship for optimal outcomes in rare pregnancy infections.

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