Most common cause of acute epiglottitis is
**Core Concept**
Acute epiglottitis is a medical emergency characterized by inflammation of the epiglottis, which can lead to airway obstruction. The condition is often caused by bacterial infections.
**Why the Correct Answer is Right**
The most common cause of acute epiglottitis is Haemophilus influenzae type b (Hib), although the incidence has decreased with the introduction of the Hib vaccine. Other bacteria like Streptococcus pneumoniae and Staphylococcus aureus can also cause the condition.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect as it is not specified.
**Option B:** Incorrect as it is not specified.
**Option C:** Incorrect as it is not specified.
**Option D:** Incorrect as it is not specified.
**Clinical Pearl / High-Yield Fact**
Acute epiglottitis is a medical emergency that requires prompt recognition and treatment to prevent airway obstruction.
**Correct Answer:** D. Haemophilus influenzae type b