The separation of types among the pneumococci previously included in group IV1 has made it possible properly to classify pneumococci from practically all sources,2 thus affording a more rational attack on various epidemiologic,3 immunologic4 and clinical5 aspects of pneumococcic infections and their specific treatment.6 It has made possible also the segregation of pneumococci previously recognized primarily because of their relationship to other types.7 The antibody response to infections with such related types and the immunologic reactions of normal human subjects to these pneumococci have already received some attention.8 The clinical and bacteriologic features of the disease produced by type III and the related type VIII pneumococci have been reported from two different clinics.9 This paper deals with the more important features of infections with type II and the related type V pneumococci, with especial reference to pneumonia.
The type II pneumococcus ranks second or third in frequency as a
FINLAND M, DOWLING HF. PNEUMOCOCCUS TYPE II AND TYPE V INFECTIONS. Arch Intern Med (Chic). 1936;58(4):598-619. doi:10.1001/archinte.1936.00170140023003