“…The incidence of bacterial infection found at autopsy in asthma deaths is low. Speizer, Doll & Heaf (1968) found, in 113 adults at post mortem, three with purulent pneumonia, two with bronchitis and one each with haemorrhagic pneumonia, bronchiectasis and bilateral tuberculosis-an incidence of approximately 10%, Robertson & Sinclair (1954) found 16'!^. Usually, only the classical bronchial plugging is found (Read,I96li).…”