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Selected populations at increased risk from respiratory syncytial virus infection
1New England Medical Center, Tufts University School of Medicine, Boston, MA, USA.
Insights
Respiratory syncytial virus (RSV) causes severe respiratory illness in vulnerable infants and children. High hospitalization rates in certain ethnic groups highlight the need to understand contributing host and environmental factors for effective prevention.
Area of Science:
- Pediatric infectious diseases
- Immunology
- Public health
Background:
- Respiratory syncytial virus (RSV) is a primary cause of infant bronchiolitis and pneumonia globally.
- Severe RSV disease disproportionately affects immunocompromised children and those with underlying conditions like cystic fibrosis.
- Specific ethnic groups, such as Native American and Alaskan Native children, exhibit significantly higher RSV hospitalization rates.
Purpose of the Study:
- To review the impact of RSV infection across various pediatric populations.
- To identify risk factors associated with severe RSV disease and hospitalization.
- To explore potential host and environmental factors contributing to elevated RSV rates in specific ethnic groups.
Main Methods:
- Review of existing literature and retrospective analyses of hospital admission data.
- Examination of observational study findings on respiratory infection transmission in community settings.
- Analysis of demographic and clinical data related to RSV severity and outcomes.
Main Results:
- RSV infection can lead to severe outcomes, including prolonged hospitalization and mechanical ventilation, particularly in immunocompromised infants and those with cystic fibrosis.
- Native American and Alaskan Native infants under 1 year show RSV bronchiolitis hospitalization rates nearly double the national average.
- Community living and frequent contact with young children are associated with increased incidence of acute respiratory infections.
Conclusions:
- RSV poses a significant global health threat, especially to vulnerable pediatric populations.
- Understanding unique host and environmental factors is crucial for addressing high RSV hospitalization rates in certain ethnic groups.
- Further research is needed to develop targeted prevention and management strategies for severe RSV disease.
Abstract:
Respiratory syncytial virus (RSV) is the principal cause of bronchiolitis and pneumonia in infants and young children worldwide. Deficits in cellular immunity appear to promote severe RSV disease in children with malignancies, those undergoing chemotherapy and bone marrow transplant recipients. Respiratory syncytial virus infection appears to exacerbate pulmonary symptoms of cystic fibrosis. In such patients RSV disease may result in a prolonged hospital course, which is often complicated by the need for mechanical ventilation. Retrospective analyses of hospital admissions for RSV bronchiolitis among Native American and Alaskan Native children younger than 1 year of age have demonstrated rates of 62 per 1000 or higher, compared with the national average of 34 per 1000. Among these ethnic groups, specific host factors as well as environmental factors appear to contribute to these comparatively high rates of hospitalization for RSV infection. Respiratory syncytial virus has the potential to cause disease in all age groups. A 3-year observational study found that individuals who lived in a community setting, or who cared for young children on a consistent basis, experienced acute respiratory infections more commonly than those living independently or whose interaction with children was limited.