═════════════════╤═════════════════════════════════════════════════════ NAME │ CULTURES AT AUTOPSY ─────────────────┼─────────────────┬─────────────────┬───────────────── „ │ HEART’S BLOOD │ BRONCHUS │ LUNGS ─────────────────┼─────────────────┼─────────────────┼───────────────── Pvt. Gal. │ │Pn. Type III │Pn. Type III │ │B. influenzæ │Pn. Type IV │ │Staphylococcus │B. influenzæ ─────────────────┼─────────────────┼─────────────────┼───────────────── Pvt. Sug. │Pn. Type III │Pn. Type III │Pn. Type III │ │Pn. Type IV │Pn. Type IV │ │B. influenzæ │B. influenzæ │ │Staphylococcus │ ─────────────────┼─────────────────┼─────────────────┼───────────────── Pvt. Hig. │S. hemolyticus │ │Pn. Type II │ │ │Pn. Type IV │ │ │S. hemolyticus │ │ │Staph. aureus ─────────────────┼─────────────────┼─────────────────┼───────────────── Pvt. Can. │Pn. Type I │ │Pn. Type III │ │ │S. hemolyticus ─────────────────┼─────────────────┼─────────────────┼───────────────── Pvt. Fer. │Sterile │Pn. Type IV │Pn. Type I │ │B. influenzæ │Pn. Type IV │ │Staphylococcus │B. influenzæ ─────────────────┴─────────────────┴─────────────────┴───────────────── The foregoing data show that infection with one type of pneumococcus may readily be superimposed upon or closely follow infection with another type. Cases have been cited in which it was clearly demonstrated that this was due to contact infection. It is furthermore evident that pneumonia caused by one type of pneumococcus affords no reliable immunity against pneumonia caused by another type. The same conditions that favored the spread of hemolytic streptococcus infection also favored the transfer of pneumococcus infection from patient to patient. Secondary Contact Infection in Influenza