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Updated: Jul 18, 2026

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Reservoir competency of goats for Anaplasma phagocytophilum
Robert F Massung1, Michael L Levin, Nathan J Miller
1Centers for Disease Control and Prevention, 1600 Clifton Rd., MS G-13, Atlanta, GA 30333, USA. rfm2@cdc.gov
Abstract:
The susceptibility of goats to infection by Anaplasma phagocytophilum (A. phagocytophilum) strains Ap-Variant 1 and Ap-ha was assessed by infestation of goats with field-collected Ixodes scapularis (I. scapularis) ticks. Both strains were infectious in the goat model. These results demonstrate that goats can be used in a laboratory setting to propagate A. phagocytophilum. Transmission from an infected goat to a naïve goat by I. scapularis tick feeding was used to demonstrate that goats are reservoir-competent for the Ap-Variant 1 strain.
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