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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