طفل عمره سنتان كان عنده زكام يومين، ثم استيقظ ليلاً بسعال يشبه نباح الكلب وصوت صرير مع الشهيق وهو يبكي، وصوته مبحوح. حرارته ٣٨، والتشبع ٩٦٪، وهو يشرب ولا يسيل لعابه. ما التشخيص الأرجح؟

A 2-year-old had a runny nose for two days, then woke at night with a barking cough, inspiratory stridor when crying and a hoarse voice. T 38 °C, SpO2 96%; he is drinking and not drooling. What is the most likely diagnosis?

1. Bronchiolitis
2. Croup
3. Asthma
4. Epiglottitis

Answer: B) Croup. Croup is a viral infection causing subglottic swelling, with a barking cough and stridor worse at night, usually between 6 months and 3 years. It is treated with dexamethasone, plus nebulised adrenaline when moderate or severe.