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Multicenter Study
. 1995 May;171(5):1266-73.
doi: 10.1093/infdis/171.5.1266.

Seroepidemiology of infections due to spotted fever group rickettsiae and Ehrlichia species in military personnel exposed in areas of the United States where such infections are endemic

S J Yevich  1 , J L Sánchez, R F DeFraites, C C Rives, J E Dawson, I J Uhaa, B J Johnson, D B Fishbein
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Multicenter Study

Seroepidemiology of infections due to spotted fever group rickettsiae and Ehrlichia species in military personnel exposed in areas of the United States where such infections are endemic

S J Yevich et al. J Infect Dis. 1995 May.

Abstract

A prospective, seroepidemiologic study of spotted fever group rickettsiae (SFGR) and Ehrlichia infections was done among 1194 US military personnel exposed in a heavily tick-infested area of Arkansas in 1990. Seroconversion (4-fold) and seroprevalence rates were determined by indirect immunofluorescent antibody assays. Seroconversions to SFGR occurred in 30 persons (2. 5%), whereas seroconversion to Ehrlichia species occurred in 15 (1. 3%). The majority of seroconverters did not report symptoms (22/30 [73%] of SFGR seroconverters; 10/15 [67%] of Ehrlichia species seroconverters). History of tick attachment was associated with seroconversion to SFGR (relative risk [RR] = 4. 3, P < . 001) and Ehrlichia species (RR = 3. 6, P < VSports手机版. 05). Use of permethrin-impregnated uniforms significantly decreased risk of infection (P < . 01); use of bed nets increased risk by 4-fold. Tickborne infections represent a significant threat to military personnel training in areas in which these infections are endemic. .

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