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Mayo Test Catalog, (Sorted By Test Name) - Mayo Medical ...

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FECHA<br />

91710<br />

EHRL<br />

84319<br />

the prevalence of the infection in certain populations Ehrlichiosis is sometimes diagnosed by observing<br />

the organisms in infected WBCs on Giemsa-stained thin blood films of smeared peripheral blood<br />

(morulae). Serology may be useful if the morulae are not seen or if the infection has cleared naturally or<br />

following treatment. Serology may also be useful in the follow-up of documented cases of ehrlichiosis<br />

or when coinfection with other tick- transmitted organisms is suspected. In selected cases,<br />

documentation of infection may be attempted by PCR methods.<br />

Interpretation: A positive immunofluorescence assay (titer >or =1:64) suggests current or previous<br />

infection with Ehrlichia chaffeensis. In general, the higher the titer, the more likely the patient has an<br />

active infection. Four-fold rises in titer also indicate active infection.<br />

Reference Values:<br />

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