The most common etiological agent for acute bronchiolitis in infancy is ?
Influenza virus
Para influenza virus
Rhinovirus
Respiratory syncytial virus
Ans. is 'd' i.e., Respiratory syncytial virus "The most common etiological agent for Bronchiolitis is Respiratory synctial virus. RSV is responsible for more than 50% of cases of bronchiolitis." Bronchiolitis o Bronchiolitis is the most common serious acute lower respiratory tract infection in infants and young children. o Most vulnerable group is between the ages of 1 and 6 months. o But the disease can affect children up to 2 years. o More common in males. Organisms causing bronchiolitis o Bronchiolitis is predominantly a viral disease. i) RSV (most common) ii) Parainfluenza virus 3, 1, 2 v) Mycoplasma pneumoniae iii) Adenovirus iv) Influenza virus