Pneumococcus 11 S. hemolyticus 24 Pneumococcus, S. hemolyticus 1 No organism 12 —— Total 48 Table XXXVII showing the percentage incidence of pneumococci, hemolytic streptococci, staphylococci and B. influenzæ further emphasizes the similarity between the bacteriology of peribronchiolar pneumonia (Table XXXVI) and the closely related hemorrhagic lesion: TABLE XXXVII ══════════════╤═════════════╤═════════════╤══════════════╤═════════════ │ │ HEMOLYTIC │ │ │PNEUMOCOCCUS │STREPTOCOCCUS│STAPHYLOCOCCUS│B. INFLUENZÆ ──────────────┼─────────────┼─────────────┼──────────────┼───────────── Bronchus │ 44.0%│ 64.0%│ 44.0%│ 72.0% Lung │ 31.6%│ 57.9%│ 26.8%│ 52.6% Blood of heart│ 25.0%│ 52.1%│ 0%│ 0% ──────────────┴─────────────┴─────────────┴──────────────┴───────────── Pneumococci have been found in the lungs (31.6 per cent) and blood (25 per cent), somewhat less frequently than with peribronchiolar pneumonia (43.9 and 40.3 per cent respectively), and hemolytic streptococci have been found in the blood more frequently (52.1 per cent) than with the latter (36.8 per cent) but otherwise the bacteriology of the two lesions corresponds closely. The low incidence of B. influenzæ in the bronchi (72 per cent) with hemorrhagic peribronchiolar pneumonia is perhaps incorrect as the result of the relatively small number of bacteriologic examinations (namely, 25), but the incidence of the same microorganism in the lung has been higher (52.6 per cent) than with nonhemorrhagic peribronchiolar lesion (43.9 per cent). In some instances infection with hemolytic streptococci has occurred after the onset of pneumonia. The following list compares the results of bacteriologic examination of the sputum made after the onset of pneumonia with that of blood, lungs or bronchus after death: SPUTUM IN BLOOD, LUNGS OR BRONCHUS AT AUTOPSY Autopsy 237 S. hem. S. hem. 242 Pneum. atyp. II, B. inf. Pneum. atyp. II 247 Pneum. IV, B. inf. Pneum. IV 266 S. hem. S. hem., B. inf. 346 Pneum. IV, B. inf. S. hem., B. inf. 376 (No. S. hem.) S. hem., staph., B. inf. Instances of secondary infection with hemolytic streptococcus occur in the list, namely, Autopsies 346 and 376.