CLINICAL CHARACTERISTICS OF THE TICK TYPHUS OF NORTHERN ASIA
ARMY BIOLOGICAL LABS FREDERICK MD
Pagination or Media Count:
The infections of Northern-asiatic tick typhus observed in the Far East distinguished themselves by their seasonality it appeared in the beginning of May and terminated in October the maximum number of infections came in the three summer months. The infections were connected with travel to rural wooded or brushy land of 62 patients 42 bore tick bites. The incubation period was 3-5 days in a majority of the cases, but was shorter, 1 day, or longer, 10 days. The length of the incubation period did not effect the severity of the illness. The clinical course differed by a high-qualitative, and characterized itself with, a sudden commencement, fever with a duration of 9-10 days a greater part of the time, hyperemia of the face, characteristic, chiefly roseolus-papuloid rash which was more pronounced on the buttocks and thighs. The greatest titer of agglutination was obtained during serological reactions with proteus X2 with proteus X19 the titer, as a rule, was significantly lower.
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