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Volume 5, Number 2—April 1999

Perspective

Disparity in the Natural Cycles of Borrelia burgdorferi and the Agent of Human Granulocytic Ehrlichiosis

Michael L. LevinComments to Author , Franka des Vignes, and Durland Fish
Author affiliations: Yale School of Medicine, New Haven, Connecticut, USA

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Table 3

Exposure to the agent of human granulocytic ehrlichiosis in white-footed mice, as detected by xenodiagnosis and indirect immunoflorescence assay (IFA), and their infestation with Ixodes scapularis nymphs and larvae (Bridgeport, Connecticut)

Status of mice Mice tested Mean no. of nymphs
(± SE) Mean no. of larvae
(± SE)
Infectiousa 20 0.7±0.1 19.5±1.6
IFA-positive 46 0.9±0.1 14.9±0.9
IFA-negative 72 0.7±0.1 17.8±1.9
noninfectious

aMice infectious for ticks at the time of study.

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