رضيعة عمرها ٧ أشهر عندها حرارة ٣٩٫٤ منذ يومين بدون زكام أو كحة، وهي متهيجة وترضع أقل، وتقيأت مرة. لا يوجد طفح، والرقبة لينة. الفحص لا يظهر سبباً واضحاً. ما الفحص الأهم؟

A 7-month-old girl has had fever 39.4 °C for two days without cold symptoms or cough; she is irritable, feeding less and vomited once. No rash, supple neck, and examination shows no clear source. Which test matters most?

1. Nothing, just antipyretics and wait a week
2. Urinalysis and culture from a catheter or clean-catch sample
3. A chest X-ray because most fever comes from pneumonia
4. A stool test only because she vomited once

Answer: B) Urinalysis and culture from a catheter or clean-catch sample. In infants, fever without a source may be a UTI. Samples are taken by catheter or clean catch, as adhesive bags are often contaminated.