Hairless
Last reviewed: 23.04.2024
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Hairless (synonyms: creeping disease, tinea migrans) is a rare parasitic disease.
Causes and pathogenesis of a hairy. The disease is caused mainly by larvae of the horse gadfly (Gastrofilus equi), less often by other representatives of Gastrofilus or larvae of Nematoda worms. Through damaged areas of the skin (micro-trauma, scratches, etc.), the pathogen penetrates the epidermis. Infection occurs when you touch the horse.
Symptoms of a hairy. At the site of the introduction of the larva, a bubble appears, the contents of which quickly grow turbid, shrink into a crust. A few days later, a continuous erythema-edematous cushion forms, spreading in different directions, corresponding to the movement of the larva. In this case, peculiarly curved, jagged edematous red bands, bends arise. The larva moves fairly quickly - from 3 to 30 cm per day. In the area of the actively spreading roller, puffiness and redness are more pronounced, which tentatively indicates the location of the larva. From subjective sensations, patients notice itching, burning, children may have a general condition disorder. The disease can take months, rarely - years. The forecast is favorable.
Histopathology. In the derma around the hair follicles and sebaceous glands an infiltrate consisting of neutrophils and eosinophils is noted, the larval movement in the upper layers of the epidermis is determined.
Differential diagnosis should be carried out with hives, scabies.
Treatment of hairy. Freezing the affected area with chloroethyl or "snow" of carbonic acid, extracting the larva with a needle under a magnifying glass.
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