Anaplasma phagocytophilum was diagnosed via PCR on EDTA whole blood from a 7-month-old foal.

The foal was febrile (104 F) with soft, pale, fetid manure for one day. A hemogram and chemistry panel revealed a few mild abnormalities worth noting. A mild regenerative anemia, thrombocytopenia, toxic changes in neutrophils, and a mild hypoalbuminemia were detected. The serum amyloid A result was very elevated at 2149 (normal range 0-8) and the fibrinogen was also markedly elevated at 700 (normal range 0-200).

This foal tested negative for coronavirus, rotavirus, salmonella and endoparasites.