This disease caused by the protozoon Babesia equi was introduced to Australia in infected imported horses and transmitted locally by poor injection technique. The disease probably no longer exists in Australia.

Diagnosis

Clinical signs of depression and anorexia with intermittent fever. Anaemia, haemoglobinuria and subcutaneous oedema may be present. In chronic cases there may be loss of condition and mild anaemia. Demonstration of the organism in thick and thin blood smears, serology.

Specimens required

1. Thick blood smears dried under cover (not by heat or exposure to sunlight) for parasite examination.
2. Blood films for haematology.
3. 5 ml of blood in EDTA vacuum tube for haematology.
4. At least 2 ml of serum for serology (B. equi IFAT).