Skip to main content

Table 1 Prevalence of vaginal microorganisms in the early stage of pregnancy and during the 3rd trimester

From: Relationship between vaginal group B streptococcus colonization in the early stage of pregnancy and preterm birth: a retrospective cohort study

  Early stage of pregnancy 3rd trimester
Vagina
n = 1079
Vagina and rectum
n = 1033
GA at examination, wk. [range] 14.4 [11.3–17.7] 34.6 [33.1–36.9]
Nugent score
 0–3 888 (82.3) 903 (87.4)
 4–6 117 (10.8) 75 (7.3)
 7–10 (Bacterial vaginosis) 74 (6.9) 55 (5.3)
Abnormal bacterial colonization
 GBS
  Positive 61 (5.7) 98 (9.5)
  Negative 1018 (94.3) 935 (90.5)
Candida albicans
  Positive 59 (5.5) 74 (7.2)
  Negative 1020 (94.5) 959 (92.8)
Candida glabrata
  Positive 25 (2.3) 15 (1.5)
  Negative 1054 (97.7) 1018 (98.5)
Candida krusei
  Positive 2 (0.2) 1 (0.1)
  Negative 1077 (99.8) 1032 (99.9)
 CNS
  Positive 18 (1.7) 107 (10.4)
  Negative 1061 (98.3) 926 (89.6)
Staphylococcus aureus
  Positive 10 (0.9) 14 (1.4)
  Negative 1069 (99.1) 1019 (98.6)
 Enterococcus species
  Positive 7 (0.6) 20 (1.9)
  Negative 1072 (99.4) 1013 (98.1)
 Escherichia coli
  Positive 2 (0.2) 4 (0.4)
  Negative 1077 (99.8) 1029 (99.6)
 MRSA
  Positive 0 (0.0) 1 (0.1)
  Negative 1079 (100) 1032 (99.9)
 Others
  Positive 11 (1.0) 10 (1.0)
  Negative 1068 (99.0) 1032 (99.0)
  1. Data are presented as median [range] for continuous variables and n (%) for categorical variables
  2. GA Gestational age, GBS Group B Streptococcus, CNS Coagulase-negative staphylococci, MRSA Methicillin-resistant Staphylococcus aureus