May 13 and 21; total number rats reported positive for plague from the beginning of the outbreak, 86, of which 75 were reported found in San Juan and vicinity. UNION OF SOUTH AFRICA. Destruction of Wild Rodents.1 Information dated April 30, 1921, shows that efforts were being made in the Union of South Africa to exterminate certain wild rodents belonging to the mouse family which were stated to have been proved to be plague infected over a wide area of the Orange Free State. These rodents are described as nocturnal in their habits and difficult to locate, as they close up their burrows from inside. Effective measures of destruction were stated to have been taken in limited areas around homesteads and dwellings by the use of carbon bisulphide, the gas from which sinks into the burrows. CHOLERA, PLAGUE, SMALLPOX, TYPHUS FEVER, AND YELLOW FEVER. Reports Received During Week Ended July 1, 1921.2 Public Health Reports, Feb. 25, 1921, p. 420, and Apr. 15, 1921, p. 840. From medical officers of the Public Health Service, American Consuls, and other sources. CHOLERA, PLAGUE, SMALLPOX, TYPHUS FEVER, AND YELLOW FEVER-Continued. Reports Received During Week Ended July 1, 1921—Continued. CHOLERA, PLAGUE, SMALLPOX, TYPHUS FEVER, AND YELLOW FEVER-Continued. Reports Received During Week Ended July 1, 1921-Continued. |