Molecular characterization of streptococcus agalactiae isolates from pregnant and non-pregnant women at Yazd University Hospital, Iran

Maryam Sadeh, Roya Firouzi, Abdollah Derakhshandeh, Mohammad Bagher Khalili, Fanrong Kong, Timothy Kudinha

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
5 Downloads (Pure)


Background: Streptococcus agalactiae (Group B streptococcus, GBS) that colonize the vaginas of pregnant women may occasionally cause neonatal infections. It is one of the most common causes of sepsis and meningitis in neonates and of invasive diseases in pregnant women. It can also cause infectious disease among immunocompromised individuals. The distribution of capsular serotypes and genotypes varies over time and by geographic era. The serotyping and genotyping data of GBS in Iranian pregnant and non-pregnant women seems very limited.

Objectives: The aim of this study was to investigate the GBS molecular capsular serotype and genotype distribution of pregnant and nonpregnant carrier women at Yazd university hospital, in Iran.‎

Patients and Methods: In this cross-sectional study, a total of 100 GBS strains isolated from 237 pregnant and 413 non-pregnant women were investigated for molecular capsular serotypes and surface protein genes using the multiplex PCR assay. The Chi-square method was used for statistical analysis.

Results: Out of 650 samples, 100 (15.4%) were identified as GBS, with a predominance of capsular serotypes III (50%) [III-1 (49), III-3 (1)], followed by II (25%), Ia (12%), V (11%), and Ib (2%), which was similar with another study conducted in Tehran, Iran, but they had no serotype Ia in their report. The surface protein antigen genes distribution was rib (53%), epsilon (38%), alp2/3 (6%), and alpha-c (3%). Conclusions: The determination of serotype and surface proteins of GBS strains distribution would be relevant for the future possible formulation of a GBS vaccine.

Original languageEnglish
Article numbere30412
JournalJundishapur Journal of Microbiology
Issue number2
Publication statusPublished - 15 Feb 2016

Fingerprint Dive into the research topics of 'Molecular characterization of <i>streptococcus agalactiae</i> isolates from pregnant and non-pregnant women at Yazd University Hospital, Iran'. Together they form a unique fingerprint.

Cite this