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The hosts of these worms are not human and the larvae can only penetrate the upper five layers of the skin, where they give rise to intense, local itching, usually on the foot or lower leg, known as ground itch.

It is small enough to burrow into human skin, causing a sensation known as ground itch.

It is their entrance through the skin that causes ground itch or dew itch.

In foul foot, or ground itch, of cattle, the inflammation of the skin and toes usually affects but one foot.

In foul foot or ground itch of cattle, the inflammation of the skin and toes is general and not in certain spots, as in foot-and-mouth disease.