Myiasis is the infestation of the body of a live human being or other vertebrate by fly larvae that feed on its tissue. When the attack is directed against dead or necrotic tissue, the condition is not necessarily harmful and the effects may be of value as maggot therapy. Colloquialisms for myiasis include flystrike, blowfly strike, and the victim or the tissue may be described as fly-blown. The name of the condition derives from ancient Greek, meaning “fly”.
Myiasis varies widely in the forms it takes and its effects on the victims. Such variations depend largely on the fly species and where the larvae are located. Some flies lay eggs in open wounds, other larvae may invade unbroken skin or enter the body through the nose or ears, and still others may be swallowed if the eggs are deposited on the lips or on food.