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What is Most common cause of infectious croup is and explain in detail?
Ans. is 'b' i.e., Parainfluenza type I Infectious croup (Laryngitis & laryngotracheobronchitis)o Nearly always caused by viral infectiono Usually by parainfluenza type I.o Other-RSVParainfluenza 2,3InfluenzaAdenoviruso TreatmentHumidified oxygenIntravenous fluid for adequate hydrationAntibiotic (ampicillin ceftriaxone) if suspecting epiglottitis.