A 3-year old well immunized male child is brought to the paediatric outpatient depament with sore throat, fever and noisy breathing with inability to swallow for the past four hours. Examination showed a toxic, tachypnoeic child with inspiratory stridor. There is suprasternal, supra clavicular and inter costal recession during inspiration. Which of the following is the most likely diagnosis :

**Core Concept**
The child's presentation of sore throat, fever, noisy breathing, inspiratory stridor, and inability to swallow suggests an acute upper airway obstruction. The presence of suprasternal, supraclavicular, and intercostal recession during inspiration indicates severe respiratory distress.

**Why the Correct Answer is Right**
The child's symptoms and signs are consistent with a diagnosis of **croup**, a common pediatric emergency characterized by acute laryngotracheobronchitis. Croup occurs due to inflammation and edema of the larynx and trachea, often caused by viral infections such as parainfluenza or influenza. The inspiratory stridor and noisy breathing are due to the narrowing of the airway, while the inability to swallow is a result of the pain and swelling in the throat.

**Why Each Wrong Option is Incorrect**
* **Option A:** Although epiglottitis can cause respiratory distress, the child's presentation of sore throat and inability to swallow is more suggestive of croup. Epiglottitis typically presents with a more sudden onset of severe respiratory distress and a "hot potato" voice.
* **Option B:** Foreign body aspiration can cause acute upper airway obstruction, but the child's history of well-immunization and the absence of a clear history of aspiration make this diagnosis less likely.
* **Option C:** Bronchiolitis is a common lower respiratory tract infection in infants, but the child's age and presentation of inspiratory stridor and noisy breathing are more suggestive of croup.

**Clinical Pearl / High-Yield Fact**
Croup is often referred to as "croupy cough" due to the characteristic barking or seal-like cough that patients may experience.

**Correct Answer:** C.

✓ Correct Answer: B. Acute Epiglottitis