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

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1. Consideration of all the evidence available makes it seem highly probable that B. influenzæ is the specific etiologic agent of epidemic influenza, because (a) it is always present in early uncomplicated cases of influenza; (b) it is predominantly so during the acute stage of the disease in cases going on to rapid recovery without development of complications; (c) its presence in varying numbers in normal individuals and in other diseases of the respiratory tract is not valid evidence against its etiologic relationship to influenza, but on the contrary is quite in harmony with what should be expected from our knowledge of other bacteria known to be the etiologic agents of various respiratory diseases; (d) its rapidly increasing prevalence in normal individuals simultaneously with the progress of the epidemic indicates that actual dissemination of B. influenzæ readily occurs and is very widespread during pandemic times; (e) cultures of B. influenzæ freshly isolated from early acute cases of influenza are pathogenic for animals, and may produce in monkeys a disease closely resembling influenza.