The foregoing statements are based on results obtained in an attempt to separate streptococcus carriers from noncarriers in a limited group of cases of influenza at Camp Pike, the investigation being conducted during a secondary wave of influenza between November 27 and December 5. A special group of five wards consisting of one receiving ward and four distributing wards were set aside for the study. Cubicles, masks and gowns were in use and the wards were not crowded. The personnel on these wards did not carry S. hemolyticus in their throats. Patients entering the receiving ward were assigned to beds in rotation. Throat cultures were made on blood agar plates at time of admission. The plates were examined promptly the next morning, the diagnosis of S. hemolyticus being made by the characteristic hemolytic colonies and microscopic examination of stained smears. By this method a report reached the receiving ward at 9:30 a.m. and patients were promptly evacuated to the streptococcus and nonstreptococcus wards, where they were again assigned to beds in rotation, remaining confined in bed until convalescent. Confirmation of all strains of hemolytic streptococcus was subsequently carried out by isolation in pure culture, bile solubility test, and hemolytic test with washed sheep corpuscles. All cases free from hemolytic streptococci at time of admission who were sent to the “clean” wards were recultured daily throughout the period of study, those acquiring a hemolytic streptococcus being transferred to a streptococcus ward as soon as the bacteriologic diagnosis was made. The results are shown in Table XXVI. TABLE XXVI S. HEMOLYTICUS IN CASES OF INFLUENZA