Detecting Pneumococcal DNA in Healthy Children
Author Information
Author(s): C. Azzari, Cortimiglia Martina, Moriondo Maria, Canessa Clementina, Lippi Francesca, Ghiori Federica, Becciolini Laura, de Martino Maurizio, Resti Massimo
Primary Institution: Department of Paediatrics, Anna Meyer Children’s University Hospital, Florence, Italy
Hypothesis
Does real-time PCR targeting the lytA gene detect pneumococcal DNA in the blood of healthy children?
Conclusion
Real-time PCR is sensitive and specific for diagnosing invasive pneumococcal disease, showing no detectable pneumococcal DNA in the blood of healthy carriers.
Supporting Evidence
- None of the 147 healthy children tested had detectable pneumococcal DNA in their blood.
- 77 out of 147 subjects were positive for pneumococcal colonization in the throat.
- Real-time PCR showed 100% sensitivity in detecting pneumococcal DNA in culture-positive samples.
Takeaway
The study found that healthy children do not have pneumococcal DNA in their blood, even if they carry the bacteria in their throat.
Methodology
The study tested 147 healthy children for pneumococcal DNA in blood using real-time PCR targeting the lytA gene.
Limitations
The study only included children with intact immune responses, limiting applicability to other at-risk populations.
Participant Demographics
147 healthy children aged 6 months to 16 years, with a mean age of 6.4 years.
Digital Object Identifier (DOI)
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