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Myiasis

What is it?

Parasitic disease caused by the larva of Dermatobia hominis fly. The fly's larva penetrates the host's skin, which can be humans or other animals, where it will develop.

Characteristics and symptoms

After the penetration, a nodular and reddish lesion with a central opening is formed, which eliminates watery discharge (exudate), slightly yellowish or bloody. It may form one or more lesions and reach any area of skin, including the scalp. The disease causes pain and, in some cases, itching.

The lesion may be mistaken for a furuncle but a clinical feature that defines the diagnosis can be noted by observing closely the central opening of the lesion. From time to time, the larva comes to breathe and this movement can be clearly seen.

myiasis

Secondary bacterial infection may occur, increasing inflammation and leading to the formation of an abscess or erysipela. With the development, which can last between 30-70 days, the larva tends to leave the skin.

Treatment

Treatment consists of mechanical removal of the larva, which can be achieved through the expression of the nodule to view and clamp the larva, which can be difficult to achieve. It is often necessary to make an incision to enlarge the hole and obtain a better visualization of the larva.

Ivermectin, a drug taken orally, can also be used and the dosage should be adjusted by the dermatologist, according to the weight of the patient.

Related articles

- Furuncle
- Tungiasis


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