REPORTS TO THE SURGEON GENERAL, PUBLIC HEALTH AND MARINE-HOSPITAL service.

PLAGUE-PREVENTION WORK.

A CASE OF PLAGUE IN CALIFORNIA.

A case of plague occurred at Oakland, Cal., August 9, in the person of a native Californian, aged 16 years. The infection was received at Pinol Cañon, Contra Costa County, Cal.

INFECTED GROUND SQUIRRELS.

During the week ended August 5, 1911, the finding of 18 plagueinfected ground squirrels was reported in California as follows: In Contra Costa County, July 14, at Hittell ranch, 3 miles south of Pinole, 1 squirrel; July 18, at J. Costa ranch, 3 miles northeast of Pinole, 3 squirrels, and at Fernandez, 1 mile south of Pinole, 1 squirrel; July 19, at Peoples' Water Co. land, 1 squirrel; July 24, at Freitas ranch, 4 miles east of Pinole, 1 squirrel; July 25, at Fassler ranch, 2 miles east of Pinole, 1 squirrel; and July 26, at Fassler ranch, 1 squirrel, and at Peoples' Water Co. land, 24 miles north of Stege, 1 squirrel; July 29, at Peoples' Water Co. land, 24 miles north of Stege, 1 squirrel; July 31, 1 squirrel, and August 3, 1 squirrel; July 28, at Keller ranch, 24 miles east of Stege, 1 squirrel; July 28, at Mason Field ranch, 2 miles northeast of Stege, 1 squirrel, and Mason ranch, 34 miles northeast of Stege, 1 squirrel, and August 3, 1 squirrel; July 29, at Buckley ranch, 4 miles east of Berkeley, 1 squirrel."

DISTRIBUTION OF POISON.

In connection with the making of a squirrel-free zone around the cities of California on San Francisco Bay, 3,341 acres of land in Alameda County and 1,015 acres in Contra Costa County were covered with poison during the week ended August 5, 1911.

During the same period 115 acres of land in Merced County and 90 acres in San Benito County were covered with poison for the purpose of eradicating plague foci.

Record of Plague Infection.

Total number of

Date of last case of Date of last case of Date of last case of rodents found inhuman plague. rat plague. squirrel plague.

fected since May,

1907.

3 Identified, Mus norvegicus 947, Mus musculus 337, Mus rattus 220, Mus alexandrinus 175.
Squirrels Collected and Examined for Plague Infection.

In the following tables the States indicated by an asterisk are those from which reports of smallpox are received only from certain city, and in some cases county, boards of health. In these States, there

fore, the recorded cases and deaths should not be taken as showing the general prevalence of the disease. In the States not marked by an asterisk the reports are received monthly from the State boards of health and include all cases reported throughout the State.

Reports Received During Week Ended August 25, 1911.

SMALLPOX IN THE UNITED STATES-Continued.
Reports Received During Week Ended Aug. 25, 1911.

SMALLPOX IN THE UNITED STATES-Continued.

Reports Received from July 1 to Aug. 18, 1911.

[For reports received from Dec. 31, 1910, to June 30, 1911, see Public Health Reports for June 30, 1911. In accordance with custom, the tables of epidemic diseases are terminated semiannually and new tables begun.]