the condition of being filled to capacity

invade in great numbers

occupy in large numbers or live on a host

infestation with the liver fluke Fasciola hepatica; liver damage sometimes occurs; related to liver rot

infestation with the large intestinal fluke Fasciolopsis buski; common in eastern Asia

a painful and debilitating infestation contracted by drinking stagnant water contaminated with Guinea worm larvae that can mature inside a human's abdomen until the worm emerges through a painful blister in the person's skin

an infestation with or a resulting infection caused by the pinworm Enterobius vermicularis; occurs especially in children

an infestation with or a resulting infection caused by a parasite of the genus Schistosoma; common in the tropics and Far East; symptoms depend on the part of the body infected