Final answer:
Lice infestation is a communicable disease that can be transmitted from person to person through direct contact or sharing contaminated items. It causes itching and discomfort by feeding on small amounts of blood from the scalp.
Step-by-step explanation:
Lice infestation is a type of communicable disease.
Communicable diseases are infections that can be transmitted from one person to another. In the case of lice infestation, the lice are transferred from person to person through direct contact or by sharing contaminated items such as brushes or pillows.
Once lice infest the human hair, they feed on very small amounts of blood from the scalp.
This can lead to itching and discomfort for the person affected.
It is important to take steps to prevent the spread of lice infestation, such as avoiding close contact with infested individuals and avoiding sharing personal items that may be contaminated.