TABLE 2.

Vaginal microflora summarya

Organism(s)Value for gestation time of:
<37 weeks≥37 weeks
Frequency of isolationbNo. of organismscFrequency of isolationbNo. of organisms
All anaerobes8.33 ± 1.478.38 ± 1.57
All aerobes7.24 ± 2.217.12 ± 2.29
Corynebacterium spp.26/364.50 ± 0.87212/1934.66 ± 0.88
Lactobacillus sp.d75/367.82 ± 1.43377/1937.99 ± 1.30
H2O2 positive40/367.69 ± 1.50195/1938.25 ± 1.21e
H2O2 negative25/367.49 ± 1.42119/1937.60 ± 1.36
Gardnerella vaginalis 13/368.78 ± 1.3055/1938.90 ± 1.28
Prevotella spp.44/365.98 ± 1.62177/1935.72 ± 1.80
Prevotella bivia 8/365.83 ± 1.5042/1935.53 ± 1.50
Peptostreptococcus spp.32/365.30 ± 1.40134/1935.44 ± 1.43
Peptostreptococcus assacharolyticus 16/365.23 ± 1.3555/1935.05 ± 1.26
Peptostreptococcus magnus 10/365.23 ± 1.4044/1935.41 ± 1.55
Peptostreptococcus prevotii 2/365.70 ± 0.4023/1936.13 ± 1.08
Staphylococcus spp.43/364.14 ± 0.69226/1934.18 ± 0.70
Streptococcus spp.37/365.62 ± 1.66111/1934.99 ± 1.32
Mycoplasma hominis 7/366.15 ± 0.8136/1936.03 ± 1.02
Ureaplasma urealyticum 5/366.26 ± 0.8845/1935.86 ± 0.73
  • a Vaginal pH and Nugent scores were as follows (values are means ± standard deviations): for a gestation period of <37 weeks, 4.76 ± 0.78 and 2.8 ± 2.75, respectively, and for a gestation period of >37 weeks, 4.74 ± 0.79 and 2.45 ± 2.60, respectively.

  • b Values are numbers of observations/numbers of subjects.

  • c Values are log10 CFU/gram of sample ± standard deviations.

  • d A total of 10 strains in the preterm group and 63 strains in the term group were not characterized for H2O2 production.

  • e P < 0.01 when compared to value for gestation period of <37 weeks.