Читать книгу Epidemic Respiratory Disease. The pneumonias and other infections of the repiratory tract accompanying influenza and measles онлайн

11 страница из 67

In view of the wide difference of opinion concerning the pathology of influenzal pneumonia special study has been given to the lesions of the disease, because the epidemic has furnished the unique opportunity of examining all instances of pneumonia accurately referable to an epidemic of influenza attacking a large but definitely defined group of individuals (50,000 troops). In a civil hospital there is often great difficulty in deciding, even in the presence of an epidemic, if death from pneumonia is the result of influenza, but at Camp Pike the relation of the heightened death rate to the epidemic has excluded all save a trivial error in determining the relation of fatal pneumonia to influenza.

At the direction of Col. F. F. Russell, who has promoted the work of the commission by unfailing aid, a special study has been made of the relation of hemolytic streptococcus to the complications of measles.

During the later period of the investigation at Camp Pike experiments were performed on monkeys to determine the pathogenicity of B. influenzæ and of microorganism isolated from the pneumonias following influenza. Typical lobar pneumonia was produced in monkeys by intratracheal injection of pneumococci. These experiments are described in an appendix.