Evaluation of sampling locations in pregnant women and newborns for the detection of colonization with antibiotic-resistant bacteria

Zamfir, Mihai

doi:10.26226/morressier.56d6be74d462b80296c973ad

Cited by 1 publication

(2 citation statements)

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“…Although MRSA may be detected in various sites, it is commonly detected in the nares. 11,12 We screened for maternal MRSA colonization using nasal and vaginal samples in our study. We used nasal and umbilical surface swabs for neonatal screening because these sites had the highest detection efficiency in previous reports.…”

Section: Study Design Period and Participantsmentioning

confidence: 99%

“…We used nasal and umbilical surface swabs for neonatal screening because these sites had the highest detection efficiency in previous reports. 11,12 All samples were collected by midwives and doctors at enrollment and immediately after delivery using a standardized sterile procedure. If MRSA was detected in the cultures of the fetal samples collected immediately after delivery, it should be considered almost entirely due to vertical transmission.…”

Section: Study Design Period and Participantsmentioning

confidence: 99%

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Vertical transmission of methicillin‐resistant Staphylococcus aureus at delivery and its clinical impact: An observational, prospective cohort study

Ogura

Inayama

Sasamoto

et al. 2021

Acta Obstet Gynecol Scand

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IntroductionMethicillin‐resistant Staphylococcus aureus (MRSA) infection has a significant clinical impact on both pregnant women and neonates. The aim of this study was to assess accurately the vertical transmission rate of MRSA and its clinical impacts on both pregnant mothers and neonates.Material and methodsWe conducted a prospective observational cohort study of 898 pregnant women who were admitted to our department and 905 neonates from August 2016 to December 2017. MRSA was cultured from nasal and vaginal samples taken from the mothers at enrollment and from nasal and umbilical surface swabs taken from neonates at the time of delivery. We examined the vertical transmission rate of MRSA in mother‐neonate pairs. We used multivariable logistic regression to identify risk factors for maternal MRSA colonization and maternal/neonatal adverse outcomes associated with maternal MRSA colonization.ResultsThe prevalence of maternal MRSA colonization was 6.1% (55 of 898) at enrollment. The independent risk factors were multiparity and occupation (healthcare provider) (odds ratio [OR] 2.35, 95% confidence interval [CI] 1.25–4.42 and OR 2.58, 95% CI 1.39–4.79, respectively). The prevalence of neonatal MRSA colonization at birth was 12.7% (7 of 55 mother‐neonate pairs) in the maternal MRSA‐positive group, whereas it was only 0.12% (one of 843 pairs) in the maternal MRSA‐negative group (OR 121, 95% CI 14.6–1000). When maternal vaginal samples were MRSA‐positive, vertical transmission was observed in four of nine cases (44.4%) in this study. Skin and soft tissue infections developed more frequently in neonates in the maternal MRSA‐positive group than in the MRSA‐negative group (OR 7.47, 95% CI 2.50–22.3).ConclusionsThe prevalence of MRSA in pregnant women was approximately 6%. Vertical transmission caused by maternal vaginal MRSA colonization was observed in four of nine cases (44.4%). Although our study includes a limited number of maternal MRSA positive cases, the vertical transmission of MRSA may occur in up to 44% of neonates of mothers with vaginal MRSA colonization. Maternal MRSA colonization may be associated with increased development of skin and soft tissue infections in neonates via vertical transmission.

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Section: Study Design Period and Participantsmentioning

confidence: 99%

Section: Study Design Period and Participantsmentioning

confidence: 99%