V. Evaluation of Cross-Immunity against Type 1 Dengue Fever in Human Subjects Convalescent from Subclinical Natural Japanese Encephalitis Virus Infection and Vaccinated with 17D Strain Yellow Fever Vaccine
A skeletal survey of rickettsial diseases in Mexico was made by complement-fixation using specific antigens. The predominant type of typhus fever is found to be classic (epidemic). The murine (endemic) type is also present and often exists side by side with the classic.
The complement-fixation test may be used as an epidemiological and diagnostic tool in distinguishing classic and murine types of typhus fever with respect to the specially prepared antigens.
The Army is not responsible for the contents or authorship of this paper.
Major, M.C., A.U.S. Now, 41 Deepdale Parkway, Roslyn Heights, N. Y.
Institute of Health and Tropical Diseases, Mexico, D.F.
Colonel, M.C., A.U.S. (Deceased).
Division of Epidemiology, Secretariat of Health and Welfare, Mexico.