A 3-year-old male Bloodhound dog was presented to a private veterinary hospital at Ciudad Victoria, Tamaulipas, Mexico, with a 2-week history of weight loss, generalized weakness, anorexia and ptyalism. Results of a hemogram revealed moderate anemia with a chronic inflammatory leukogram. Also, various neutrophlis (approximately 10%) containing elongated pale blue staining intracytoplasmic inclusions, compatible with gametocytes of Hepatozoon spp were observed. Up until now, this is the first case report of canine hepatozoonosis detected in Tamaulipas. [ABSTRACT FROM AUTHOR]