The Prevalence of Group B Streptococcus in First and Third Trimester Pregnancy

Abstract

Objective: To determine and compare the prevalence of group B streptococcus in first and third trimaster pregnancy in Thai woman attending antenatal clinic, HRH princess Maha Chakri Sririnhorn Medical Center, Nakorn-nayok province. Materials and Method: This study was carried out from October 2002 through May 2005 at antenatal clinic, HRH princess Maha Chakri Sririnhorn Medical Center, Nakorn-nayok province. 286 pregnant women were enrolled. Vaginal discharge was collected in first and third trimester and cultured.The prevalence of group B streptococcus was determined. Results: The prevalence of group B streptococcus in first trimester pregnancy was 4.5 % (13 cases) third trimester was 1.7 % (5 cases). In all women who group B streptococcus was detected at first trimester only have 2 cases maintained at third trimester. Conclusion: The prevalence of group B streptococcus in Thai women at Nakorn-nayok was low. There was difference between the prevalence of group B streptococcus in first and third trimester.