It has been our object to obtain data as to the frequency of influenza infection as a complication of phthisis ; as to the frequency with which the symptoms of patients diagnosed as having pulmonary tuberculosis, but with negative sputum, may be accounted for by chronic influenza infection, and as to what extent the percentage of recoveries in sanatoriums for tuberculosis have been swelled by the inclusion of cases of influenzal bronchitis.
Influenza bacilli are said to be present in a large percentage of the population.1 Lockhardt's2 summary of the results of Scheller, Holt, Lord, Davis, Allen, Boggs, Grassberger and Wollstein shows that in 172 supposedly normal persons, organisms of the influenza type were found in 25 per cent., while in 427 cases of infection they were found in 50 per cent. Leutscher3 found the influenza bacillus responsible for 22 per cent. of 388 cases of acute
HAMBLET ML, BARNES HL. CHRONIC INFLUENZA IN PULMONARY TUBERCULOSIS. Arch Intern Med (Chic). 1916;XVIII(3):313-316. doi:10.1001/archinte.1916.00080160026003