Liver flukes are parasitic flatworms belonging to the class Trematoda. They primarily infect the livers of various animals, including cattle, sheep, and humans. These parasites can cause significant health issues, such as liver damage and inflammation, leading to a condition known as fascioliasis. Transmission typically occurs through contaminated water or plants, where the fluke larvae develop. Once ingested, they migrate to the liver, where they mature and reproduce. Preventive measures include proper sanitation and cooking food thoroughly to avoid infection from these parasites.