Caused by the protozoan parasite ''[[Neospora|Neospora caninum]]'' and is the commonest cause of abortion in dairy cattle. ''Neospora caninum'' is similar to ''[[Toxoplasma gondii]]'' and although the complete life cycle of the protozoa is unknown, the dog has been found to be the definitive host. | Caused by the protozoan parasite ''[[Neospora|Neospora caninum]]'' and is the commonest cause of abortion in dairy cattle. ''Neospora caninum'' is similar to ''[[Toxoplasma gondii]]'' and although the complete life cycle of the protozoa is unknown, the dog has been found to be the definitive host. |