Severe pulmonary co-infection with varicella-zoster virus, Pneumocystis jirovecii and Cytomegalovirus: a case report.

Pneumocystis jirovecii, Cytomegalovirus and varicella-zoster virus are all opportunistically infective pathogens, but pulmonary co-infection with these pathogens is rare. Herein, this case report describes a patient with autoimmune haemolytic anaemia treated with methylprednisolone and cyclosporine that presented with rapidly progressive severe respiratory failure. Analysis of microbial nucleic acid sequences in both blood and sputum using next-generation sequencing revealed pulmonary co-infection with Pneumocystis jirovecii, varicella-zoster virus, and possibly Cytomegalovirus. After timely targeted and supportive treatments, the patient recovered. This case report highlights the imaging features of co-infection with these pathogens, the importance of next-generation sequencing for early diagnosis in immunosuppressed patients, and the effects of corticosteroid therapy.