Chronic cough in children — clinical case

Case summary

This toddler presents with an isolated chronic wet cough of eight weeks in a well, thriving child with no specific-cough pointers. The essential clinical insight is that a chronic wet cough is protracted bacterial bronchitis until proven otherwise, and that in an Aboriginal child from a remote community the threshold for decisive treatment and follow-up must be low, because this population carries a high burden of suppurative lung disease and bronchiectasis. [1] [3]

Initial assessment and investigations

The history and examination are directed at the wet-versus-dry branch point and at the specific-cough pointers. This cough is unequivocally wet, has never returned to a cough-free baseline, and carries no pointers to alternative disease — no cough from birth, no choking episode, no failure to thrive, and no clubbing. The baseline work-up is a chest X-ray, which shows only mild peribronchial thickening, consistent with protracted bacterial bronchitis rather than focal or structural disease. [1] [2]

Because he is too young for reliable spirometry, and because there are no pointers mandating deeper testing at this stage, extensive investigation is not warranted up front. A wet cough with a normal or minimally abnormal film in a thriving child is treated first and investigated further only if it fails to clear. [2]

Management

The working diagnosis is protracted bacterial bronchitis and the treatment is a trial of an appropriate oral antibiotic for at least two weeks, with amoxicillin-clavulanate the best-evidenced agent. Resolution of the cough within this period treats the child and confirms the diagnosis. Alongside the antibiotic, I would address household tobacco smoke and ensure culturally safe, accessible follow-up, since continuity is what prevents progression in this high-risk group. [2] [3]

If the cough only partially responds or recurs, the course is extended to four weeks. Recurrent episodes, or a cough that fails to clear after adequate antibiotics, trigger escalation to flexible bronchoscopy with bronchoalveolar lavage, a chest CT to look for bronchiectasis, and a work-up for immunodeficiency and cystic fibrosis. In this population early recognition of bronchiectasis materially changes the long-term trajectory. [2] [3]

Disposition and counselling

Once the cough resolves on treatment, the child is safety-netted with clear advice to return if the wet cough recurs or if any pointer emerges. The family is counselled that the cough had a real, treatable cause rather than being "just a virus," that over-the-counter cough medicines have no role, and that removing tobacco smoke protects his airways. Structured follow-up is arranged because recurrence flags the children who need specialist respiratory assessment for suppurative lung disease. [3] [2]