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Multiplex PCR Assay for Typing of Staphylococcal Cassette Chromosome Mec Types I to V in Methicillin-resistant Staphylococcus aureus
Published on: September 5, 2013
Use of a DNA typing method to investigate a fatal perinatal infection due to Staphylococcus aureus
C Ramanantsoa1, S Chatellier, P Harriau
1Départment de Microbiologíe Médicale et Moléculaire, URA CNRS 1334, CHU Bretonneau, Tours, France.
Abstract:
The aim of this study was to determine, by random amplified polymorphic DNA analysis, the origin of a fatal Staphylococcus aureus perinatal infection which occurred after multiple cervical examinations before induction of labor for patient convenience. This DNA typing method was able to demonstrate that this infection originated from S. aureus genital carriage and urinary tract infection of the mother, and was not acquired in the hospital. This observation argues for the systematic screening of genital flora for highly virulent strains before induction of labor for non medical reasons. In addition, the DNA typing method used demonstrates that one neonate was subsequently infected by the strain responsible for the chorioamnionitis. This shows that molecular typing methods can help determine hospital staff responsibility.
Insights
A fatal Staphylococcus aureus perinatal infection was traced to the mother's own bacteria, not hospital acquisition. This highlights the need for maternal screening before labor induction for non-medical reasons.
Area of Science:
- Microbiology
- Genetics
- Perinatal Medicine
Background:
- Perinatal infections pose significant risks to newborns.
- Staphylococcus aureus is a common cause of bacterial infections.
- Identifying the source of infection is crucial for effective treatment and prevention.
Observation:
- A fatal perinatal infection caused by Staphylococcus aureus occurred following multiple cervical examinations before labor induction.
- The infection was investigated using random amplified polymorphic DNA analysis.
Findings:
- Random amplified polymorphic DNA analysis identified the source of the Staphylococcus aureus infection as the mother's endogenous genital carriage and urinary tract infection.
- The neonate was subsequently infected by the same strain responsible for chorioamnionitis.
- The infection was not acquired nosocomially (in the hospital).
Implications:
- Suggests systematic screening of maternal genital flora for virulent strains before non-medically indicated labor induction.
- Demonstrates the utility of molecular typing methods in tracing infection origins and potentially determining staff responsibility in healthcare settings.
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