Besnoitiosis is a parasitic disease caused by Besnoitia besnoiti, transmitted by blood-sucking insects or reuse of hypodermic needles. It has an average incubation period of 13 days to two months. Initial symptoms include lethargy, poor appetite, weight loss, and high fever. Later, cysts form, leading to swelling and skin thickening. There is no cure, so prevention is key, especially in farming. This involves checking imported livestock for skin abnormalities, blood testing, and ensuring that infected animals are not purchased. Additionally, preventing fly breeding can help limit disease spread.