What virus is responsible for 50-70% of cases of acute bronchiolitis?

Respiratory Syncytial Virus (RSV) is responsible for 50-70% of cases of acute bronchiolitis, particularly in infants and young children. This virus is highly contagious and primarily affects the lower respiratory tract, leading to inflammation of the bronchioles. Acute bronchiolitis is characterized by symptoms such as wheezing, difficulty breathing, and increased respiratory effort, which can arise from the viral infection, making RSV the predominant cause in this age group.

The significance of RSV in acute bronchiolitis cannot be overstated, as it not only affects a large proportion of affected children but also can lead to more severe respiratory complications in those with underlying health issues or premature birth history. Understanding the role of RSV helps in managing and treating acute bronchiolitis, including considerations for supportive care and potential antiviral therapies in severe cases.