The pig louse, also known as Haematopinus suis, is a parasitic insect that feeds on the blood of pigs. While pig lice infestations can cause irritation, itching, and skin damage in pigs, they are not known to transmit any specific diseases to humans. However, severe infestations can lead to secondary infections and other health issues in pigs, so it is important to control lice populations through proper management and treatment.