Clinical severity of RSV bronchiolitis

Area of Science:

• Pediatrics
• Infectious Diseases
• Virology

Background:

• Bronchiolitis severity comparison across viral etiologies remains inconclusive.
• Respiratory syncytial virus (RSV) is a common cause of infant bronchiolitis.

Purpose of the Study:

• To compare the clinical severity of bronchiolitis based on the identified causative virus.
• To investigate differences in hospital resource utilization among infants with RSV, RSV co-infections, and other viral infections.

Main Methods:

• Retrospective cohort study of 1152 infants under one year of age admitted with bronchiolitis.
• Viral detection via throat swabs.
• Comparison of outcomes including length of hospital stay, PICU/HDU admissions, intubations, and nasogastric (NG) nutritional support using t tests and Fisher exact test.

Main Results:

• RSV was detected in 56% of cases, RSV with another virus in 15%, and other viruses in 29%.
• Infants with RSV (alone or co-infected) experienced statistically longer hospital admissions and a higher likelihood of requiring NG nutritional support.
• No significant differences were observed in PICU/HDU admissions or intubation rates between the groups.

Conclusions:

• RSV bronchiolitis is associated with increased healthcare resource utilization, particularly longer hospital stays and need for nutritional support.
• Co-infection with RSV does not appear to significantly alter the severity of bronchiolitis compared to RSV alone.
• Further research is needed to clarify the impact of specific viral co-pathogens on bronchiolitis severity.