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Genital mycoplasma colonization in neonatal girls
Abstract:
Specimens obtained from the genital tract of 90 pairs of mothers and their female infants were cultured for Ureaplasma urealyticum (Ureaplasma) and Mycoplasma hominis (M.hominis). Ureaplasma and M.hominis were isolated from 80% and 17% of pregnant women, and 41% and 4.4% of female infants, respectively. Fifty nine per cent of infants were positive for Ureaplasma when they were borne per vaginam by Ureaplasma-positive mothers. However, Ureaplasma was not isolated from any of 11 infants delivered by cesarean section before rupture of the fetal membranes, in spite of positive colonization by Ureaplasma in the mothers. Quantitation of Ureaplasma revealed that neonatal colonization was closely associated with the colonization number of this microorganism in the cervical canal of mothers. Prolonged interval between rupture of fetal membranes and delivery caused a slightly increased frequency of isolation of this organism, but it was less significant. A study of mean birth weight revealed that there was no correlation between maternal or neonatal colonization by Ureaplasma and low birth weight.
Insights
Vertical transmission of Ureaplasma urealyticum (Ureaplasma) from mothers to female infants primarily occurs during vaginal birth. Neonatal Ureaplasma colonization is linked to maternal cervical colonization levels, not birth weight.
Area of Science:
- Microbiology
- Perinatology
- Neonatal Infections
Background:
- Ureaplasma urealyticum (Ureaplasma) and Mycoplasma hominis (M.hominis) are common genital tract microorganisms.
- Vertical transmission of these microbes from mother to neonate is a significant concern in perinatal health.
Purpose of the Study:
- To investigate the prevalence and transmission patterns of Ureaplasma and M.hominis from mothers to their female infants.
- To identify risk factors associated with neonatal colonization, including mode of delivery and maternal colonization levels.
Main Methods:
- Culturing genital tract specimens from 90 mother-infant pairs.
- Analyzing isolation rates of Ureaplasma and M.hominis in mothers and infants.
- Correlating neonatal colonization with maternal colonization, mode of delivery, and birth weight.
Main Results:
- Ureaplasma and M.hominis were isolated from 80% and 17% of mothers, and 41% and 4.4% of infants, respectively.
- Vaginal delivery by Ureaplasma-positive mothers resulted in a 59% infant colonization rate, while cesarean delivery showed no transmission.
- Neonatal colonization strongly correlated with maternal cervical Ureaplasma load.
Conclusions:
- Vaginal delivery is the primary route for Ureaplasma transmission to neonates.
- Maternal cervical colonization density is a key determinant of neonatal Ureaplasma colonization.
- Neither maternal nor neonatal Ureaplasma colonization was associated with low birth weight.