Viral pneumonias Respiratory viruses are reported in about 10% to 30% of immunocompetent adults hospitalised with CAP. (1) Influenza virus A/B, respiratory syncytial virus, adenovirus, rhinovirus, and parainfluenza virus are the most common viral causes of CAP in immunocompetent adults. (2)
In children:
In adults:
Other viruses which may affect the lung directly include those of measles, chickenpox and herpes zoster.
Diagnosis is confirmed by a rise in specific antibody titre.
1. Cillóniz C, Ewig S, Polverino E, et al. Microbial aetiology of community-acquired pneumonia and its relation to severity. Thorax. 2011 Apr;66(4):340-6.
2. Jennings LC, Anderson TP, Beynon KA, et al. Incidence and characteristics of viral community-acquired pneumonia in adults. Thorax. 2008 Jan;63(1):42-8.
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