Webmd gives you the facts about common parasites and their diseases learn about lice bedbugs hookworms ringworms scabies and more. Mites and lice most people are familiar with dust mites and the common lice while the dust mite does not acutally attack humans there are many mites that can bite most lice are scavengers feeding on skin and other debris found on the hosts body but some species feed on sebaceous secretions and blood. With rare exception lice are external parasites that live only on goats they are very small only one species can be seen by the naked eye causes lice have been a known problem to goat producers normally during the winter months the infestations of lice can cause intense irritation restlessness and loss of condition. Head lice human skin parasites head lice are commonly found in preschoolers and elementary school aged children they are transmitted from one person to the next by direct contact head to head or head to hat to head
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