HMPV bronchiolitis: symptoms, care and warning signs

Human metapneumovirus can inflame the smallest breathing tubes, causing mucus and narrowing that make breathing harder. A child may start with a runny nose or cough, then develop faster breathing, chest pulling, reduced feeding or wheezing. Symptoms can change over the course of an illness, so breathing effort and fluid intake matter as much as the sound of the cough. Infants, premature babies and children with heart, lung or immune conditions may need closer observation. A clinician can assess oxygen level, hydration and work of breathing.

Offer small, frequent feeds or drinks and clear nasal mucus gently before feeds and sleep. Keep the child upright while awake and allow quiet rest. Avoid smoke and strong fragrances. Give medicine only when suitable for the child and according to professional advice; antibiotics do not treat a viral infection. A nebuliser is not automatically needed, but a clinician may recommend specific treatment after examining the child. Keep watching wet nappies or urination, alertness, feeding and breathing pattern.

Call emergency services if the child has pauses in breathing, blue or grey lips, severe chest pulling, grunting, exhaustion, or cannot be woken normally. Seek urgent assessment if breathing is persistently fast, feeding falls sharply, the child has much less urine, or wheezing is worsening. Prompt review is also needed for a young infant with fever, a child who is becoming unusually sleepy, or symptoms that are clearly deteriorating.

How hard is the child working to breathe? Is oxygen monitoring needed? How much fluid should we offer and how often? What signs mean hospital assessment is needed? Would a child health consultation or nebuliser treatment be appropriate?