October 19, 2024Open Access
The Role of Quantitative PCR in Evaluating the Clinical Significance of Human Bocavirus Detection in Children
Key Result
High Human bocavirus viral loads (≥10^4 copies/mL) were associated with more severe clinical presentations, including oxygen requirement, among the 7.6% of children testing positive.
Study Design
Type
Observational (n=957)
Structured PICO
Does higher Human bocavirus (HBoV) viral load measured by qPCR correlate with more severe clinical outcomes in hospitalized children with acute respiratory infections?
P
Population
957 hospitalized children with acute respiratory infections evaluated for the clinical relevance of Human bocavirus viral loads.
E
Exposure
Quantitative polymerase chain reaction (qPCR) to measure Human bocavirus (HBoV) viral load (threshold of 10^4 copies/mL)
C
Comparator
Low viral concentrations (<10^4 copies/mL)
O
Outcome
Clinical severity, including the need for oxygen supplementation and empirical antibiotic therapy
Higher HBoV viral loads measured by qPCR are associated with more severe clinical presentations in children with acute respiratory infections, highlighting the importance of viral load quantification in diagnostics.
Abstract
Human bocavirus (HBoV) has emerged as a significant pathogen primarily associated with respiratory infections in children. This study aimed to evaluate the clinical relevance of HBoV infection by quantifying viral loads in nasopharyngeal swabs from hospitalized children with acute respiratory infections (ARIs) and investigating correlations with clinical outcomes. A total of 957 children were tested, with HBoV detected in 73 cases (7.6%), either as a sole infection or co-infection with other respiratory viruses. Quantitative polymerase chain reaction (qPCR) was employed to measure viral load, and a threshold of 104 copies/mL was used to differentiate high and low viral concentrations. Results have shown that children with lower respiratory tract infections (LRTIs) had significantly higher viral loads, most notably in cases where HBoV was the sole pathogen. Additionally, children with pre-existing health conditions were more likely to have elevated HBoV concentrations compared to those who were previously healthy. Children with higher viral loads were more likely to require oxygen supplementation and receive empirical antibiotic therapy, indicating a more severe clinical course. This study underscores the importance of considering HBoV viral load in clinical diagnostics, as higher concentrations were associated with more severe presentations, including the need for oxygen support. Future research should focus on refining diagnostic thresholds and exploring HBoV’s role in co-infections to enhance patient care strategies.