What type of lesions are associated with infection by Ascaris suum?

The correct response highlights the presence of milk spot lesions in the liver as a significant indicator of infection with Ascaris suum, also known as the large roundworm of pigs. These lesions are a result of the migration of larvae through the liver during their lifecycle. When the eggs of Ascaris suum are ingested, they hatch into larvae that penetrate the intestinal wall and travel through the bloodstream to the liver. As they migrate, they can cause localized damage, leading to scarring and the formation of milk spots, which are areas of fibrosis and inflammation.

This specific pathology is commonly observed and serves as a key diagnostic feature for veterinarians when assessing possible ascariasis in swine. The presence of milk spots in the liver is also an important consideration for food safety and animal health, as it can affect meat quality and the overall health of affected animals.

Other types of lesions mentioned may not accurately reflect the pathology associated with Ascaris suum. Hemorrhagic lesions in the intestines, for example, are more commonly associated with other gastrointestinal parasites or conditions, while inflammatory lesions in the lungs are related to infections or other diseases. Necrotic lesions in the skin could be indicative of different types of infections or environmental factors and do