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Anaplasma phagocytophilum (Ehrlichia equi)
Epidemiology:
1) vectors of Ehrlichia equi are ticks:
a) Ixodes scapularis
b) Dermacentor variabilis
2) most frequently encountered in months of April through September
3) may infect dogs & cats
Pathology:
- small obligate, intracellular coccobacillus that infects granulocyt
- etiologic agent of anaplasmosis
Laboratory:
- Ehrlichia equi serology
- Anaplasma phagocytophilum serology
- Anaplasma phagocytophilum antigen
- Anaplasma phagocytophilum DNA
- Anaplasma phagocytophilum culture
Notes:
- Anaplasma phagocytophilium is identical to Ehrlichia equi & Ehrlichia phagocytophilia [2]
General
Anaplasma
Properties
KINGDOM: monera
DIVISION: SCHIZOMYCETES
References
- Medical Knowledge Self Assessment Program (MKSAP) 11, 15, 18
American College of Physicians, Philadelphia 1998, 2009, 2018
- Dumler JS, Choi K, Garcia-Garcia JC, Barat NS, Scorpio DG,
Garyu JW, et al.
Human granulocytic anaplasmosis and Anaplasma phagocytophilum.
Emerg Infect Dis [serial on the Internet]. 2005 Dec
http://www.cdc.gov/ncidod/EID/vol11no12/05-0898.htm
- Wikipedia: Anaplasma phagocytophilum
https://en.wikipedia.org/wiki/Anaplasma_phagocytophilum
- ARUP Consult: Anaplasma phagocytophilum and Ehrlichia Species
- Anaplasmosis and Ehrlichiosis
The Physician's Guide to Laboratory Test Selection & Interpretation
https://www.arupconsult.com/content/anaplasma-phagocytophilum-coltivirus-colorado-tick-fever-and-ehrlichia-species