Eperythrozoonosis is a disease which occurs sporadically in sheep in New South Wales. It is caused by bacteria called Mycoplasma ovis (formerly Eperythrozoon ovis) occurring in the bloodstream of infected sheep.

It is likely that Mycoplasma ovis (M. ovis) is present in many flocks causing inapparent infection. On some properties, the presence of bacterial infection progresses to disease, characterised by the destruction of red blood cells leading to anaemia and jaundice. Goats can also be infected. This Primefact discusses:

• spread of the disease
• susceptible sheep
• signs of the disease
• diagnosis
• treatment
• control.