An infant with pneumonia, failure to thrive and persistent radiographical changes.

CASE HISTORY A 9-month-old male presented to his local hospital with a 2week history of diarrhoea and vomiting and a 48-h history of tachypnoea and grunting. He was afebrile on admission and oxygen saturation was 96% in room air, but he had mild respiratory distress and tachypnoea. Inflammatory markers were not raised but a chest radiograph showed left-sided collapse and consolidation. Treatment was commenced with i.v. antibiotics. The patient’s respiratory pattern worsened 24 h after admission and his oxygen saturation dropped to 90%, requiring 2.5 L?min supplemental oxygen. His diarrhoea settled after 48 h but he continued to have intermittent vomiting.