Humans and Lice
Humans and head lice have a parasitic relationship. Lice are insect parasites in which benefit at the expense of people. Lice feed exclusively on human blood. An infestation of lice harms a person's scalp and leads to blood loss and intense itching, while providing a habitat and food for the head lice. An adult female louse is capable of producing 3 - 4 eggs a day. Their eggs are known as nits and attach to human hair, making removal difficult.