Diversity of Prophage DNA Regions in Streptococcus agalactiae from Invasive Infections
Author Information
Author(s): Salloum Mazen, van der Mee-Marquet Nathalie, Valentin-Domelier Anne-Sophie, Quentin Roland
Primary Institution: Institut Fédératif de Recherche 136 Agents Transmissibles et Infectiologie, Université François-Rabelais de Tours, France
Hypothesis
The study investigates the diversity of prophage DNA regions in Streptococcus agalactiae isolates from adults and neonates with invasive infections.
Conclusion
The prophage DNA content of Streptococcus agalactiae isolates varies significantly between adults and neonates, indicating specific genetic adaptations related to invasive diseases.
Supporting Evidence
- 90% of the isolates were assigned to five major prophage DNA groups: A to E.
- The mean number of prophage DNA fragments per isolate varied from 2.6 to 4.0.
- Isolates from adults and neonates displayed significant differences in serotype distribution.
- Recombination and mutation rates were evaluated, showing a recombination-mutation ratio of 6:7.
Takeaway
Researchers looked at the DNA of bacteria that can cause serious infections in babies and adults, finding that different types of bacteria have different DNA pieces that help them survive and cause disease.
Methodology
The study used PCR to analyze the prophage DNA content of 142 S. agalactiae isolates and compared their genetic relationships through hierarchical analysis.
Limitations
The study is limited to isolates collected in France and may not represent global diversity.
Participant Demographics
75 isolates from adults (mean age 72 years) and 67 isolates from neonates (aged 1 day to 3 months).
Statistical Information
P-Value
2.01×10−6
Statistical Significance
p<0.00001
Digital Object Identifier (DOI)
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