Which of the following is the most common cause of acute laryngotracheal bronchitis?
Correct Answer: Parainfluenza virus
Description: Parainfluenza virus type 1 and 2 are the most common organism causing acute laryngotracheobronchitis. Laryngotracheobronchitis is the most common cause of infectious upper airway obstruction in children between the ages of 6 months and 3 years. Children typically present with several day history of low grade fever, rhinorrhea, sore throat and mild cough. In the next 2-3 days they develop hoarseness and barking seal cough. Lateral view of neck on Xray shows normal epiglottis and supraglottic structures, overdistended hypopharynx, haziness within the subglottis with subglottic narrowing greater on inspiration. AP view of the neck shows steeple sign or pencil point sign Ref: CURRENT Diagnosis & Treatment: Pediatrics, 20th Edition, Chapter 38
Category:
Microbiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now