Considerable data published in the past two decades relative to the effects of whooping cough on tuberculosis indicate that whooping cough is not as harmful in tuberculous children as commonly believed.
Pospischill,1 in 1921, reported the results of clinical and postmortem studies of thousands of cases of whooping cough in Vienna. He noted that there were few patients with active tuberculosis among those who died, and rarely was tuberculosis the cause of death, even though it was common in Vienna. On the other hand, there were numerous nontuberculous pulmonary changes which might be mistaken clinically for tuberculosis. Some of these pathologic changes were bronchitis, peribronchitis, bronchiectasis, interstitial induration, bronchopneumonia and pleuritis. Similar pulmonary changes were described in detail by Feyrter.2 Popischill concluded that he had never found a case in which the influence of whooping cough on tuberculosis could be proved. This conclusion was confirmed by other investigators