a1 Department of Clinical Epidemiology in General Practice, Cardiothoracic Institute, Brompton Hospital, London SW3 6HP
a2 Virology Laboratory, Brompton Hospital, London SW3 6HP
The role of viruses and M. pneumoniae in episodes of acute respiratory illness in childhood has been studied in a London general practice. The total isolation rate was 31·7%, but the rate varied from 32·6% in upper respiratory infections to 64·0% in pneumonia. The clinical features associated with infection were influenced not only by the type of agent but also by age and other host factors in the infected children. Rhinoviruses were more commonly isolated than any other agent and were frequently associated with wheezy bronchitis.
(Received September 09 1974)
p1 Present address: Faculty of Medicine, McMaster University Medical School, Hamilton, Ontario.
p2 Present address: Regional Virus Laboratory, City Hospital, Edinburgh.