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Article
January 4, 1995

Transmission of Human Granulocytic Ehrlichiosis-Reply

Author Affiliations

Duluth Clinic Duluth, Minn
University of Maryland Baltimore

JAMA. 1995;273(1):23. doi:10.1001/jama.1995.03520250037020
Abstract

In Reply.  —The letter by Dr Reed and colleagues lends further support to the concept that HGE is transmitted by a tick vector.While the case report suggests transmission of the bacterium to the patient described through the bite of the I scapularis tick, definitive proof for cause and effect is lacking. The tick was described as engorged (a consequence of the blood meal) at the time of removal. Conceivably, the tick could have taken the blood meal after the patient had already become infected with HGE from a different source, but had not yet developed symptoms of HGE at the time when the tick attached. Thus, detection of identical 16S ribosomal DNA profiles for patient blood and tick extract merely proves that the patient and the tick contained the identical bacterium at the time of sampling.The tick removed was an adult female Ixodes tick. It is unlikely that

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