Besnoitiosis is a protozoan disease of the skin, subcutis, blood vessels, mucous membranes, and other tissues' of animals. It 'is endemic in tropical and sub-tropical regions with high infection rate but low mortality'; however, it is rare in other regions. Besnoitiosis is a protozoan disease of the skin, subcutis, blood vessels, mucous membranes, and other tissues' of animals. It 'is endemic in tropical and sub-tropical regions with high infection rate but low mortality'; however, it is rare in other regions. The causative organisms of the cutaneous disease, and the affected animals include: