The foregoing studies have shown that hemolytic streptococcus infection may spread by contagion throughout an entire ward with great rapidity. Other observations have demonstrated that pneumococcus infection may be transmitted in the same way. Only three instances of this nature will be cited. The first occurred in Ward 3 (Table XXI). Between September 6 and 16 no cases of pneumonia caused by Pneumococcus Type II had been admitted to the ward. On September 16 Pvt. Swain was admitted to the ward and placed in Bed 3. Bacteriologic examination of his sputum showed that his pneumonia was caused by Pneumococcus Type II. At this time Pvt. Pullam, who had been admitted to the ward on September 9 with a pneumococcus Type IV pneumonia, occupied Bed 5 separated from Bed 3 by one intervening bed. He had had his crisis on September 14 and was doing well, his temperature being normal. On September 24 he developed a second attack of pneumonia and died on September 30. Cultures at autopsy showed Pneumococcus Type II in heart’s blood and lung, Pneumococcus Type II and B. influenzæ in the right bronchus. Pvt. Wolfe was admitted to the ward with bronchopneumonia on September 17 and placed in Bed 6 next to Pvt. Pullam. Pneumococcus Type IV and B. influenzæ were found in his sputum. His temperature had fallen to normal by lysis on September 21 and he was doing well. On September 23 his temperature suddenly rose and he developed a second attack of pneumonia. Pneumococcus Type II was isolated by blood culture on this date. He recovered. In both instances Pneumococcus Type II was acquired after the admission of a patient with a Pneumococcus Type II pneumonia, the opportunity for contact infection having been favored by the association of these patients in adjoining beds. TABLE XXII SECONDARY INFECTION WITH PNEUMOCOCCUS TYPE II ═════════════╤═════════╤══════════╤════════════╤═══════════════════════ │ BED │ │PNEUMOCOCCUS│ NAME │OCCUPIED │ ADMITTED │IN SPUTUM ON│ SECONDARY INFECTION │ │ │ ADMISSION │ ─────────────┼─────────┼──────────┼────────────┼──────────┬──────────── „ │ „ │ „ │ „ │ DATE │PNEUMOCOCCUS │ │ │ │ │ AT AUTOPSY ─────────────┼─────────┼──────────┼────────────┼──────────┼──────────── Pvt. Smith │No. 26 │Sept. 18 │II │ │II Pvt. Thompson│No. 28 │Sept. 17 │Atyp. II │Sept. 21 │II Pvt. Linehan │No. 30 │Sept. 16 │IV │Sept. 26 │II ─────────────┴─────────┴──────────┴────────────┴──────────┴────────────