In a previous publication Sawyer1 described the case of H. O., who, it was demonstrated, had infected with typhoid fever. twenty-eight persons, four of whom died. After closing this investigation and reaching the conclusion that H. O. had been the means of infecting these persons, the State Board of Health of California conferred with the United States Public Health Service in San Francisco, and the latter agreed to receive the patient at their hospital in San Francisco.
In accordance with this arrangement, H. O. was admitted to the United States Marine Hospital at San Francisco, March 19, 1912, for the purposes of study and observation, as well as to protect the public against further infection from this source.
The history of the patient was that he had had typhoid at the Marine Hospital in San Francisco in the latter part of 1907, being discharged from that institution as apparently cured, in January, 1908. The