Question
Croup syndrome is usually caused by-
| A. |
Rhinoviruses |
| B. |
Coxsackie A virus |
| C. |
Coxsackie B virus |
| D. |
Parainfluenza virus |
Show Answer
|
Correct Answer » D Explanation |
 |
- Croup syndrome (acute laryngotracheobronchitis) is most commonly caused by the Parainfluenza virus, especially Parainfluenza virus type 1.
- Other viruses that may cause croup include:
- Respiratory Syncytial Virus (RSV)
- Parainfluenza virus types 2 and 3
- Influenza virus
- Adenovirus
- The uploaded notes state:
- “Most commonly caused by Parainfluenza virus 1; others – RSV, Parainfluenza types 2 & 3, Influenza virus, Adenovirus.”
- Another uploaded document states:
- “Most common cause: Parainfluenza virus.”
Why the Other Options Are Incorrect
A. Rhinovirus
- Rhinovirus is the most common cause of the common cold (viral upper respiratory tract infection).
- It is not the usual cause of croup.
B. Coxsackievirus A
- Coxsackievirus A commonly causes:
- Herpangina
- Hand, Foot and Mouth Disease
- It is not a common cause of croup.
C. Coxsackievirus B
- Coxsackievirus B is associated with:
- Myocarditis
- Pericarditis
- Pleurodynia (Bornholm disease)
- It is not a cause of croup.
