Hookworm dermatitis

Introduction to hookworm dermatitis Hook dermatitis, also known as fecal contact block, fecal poison, pruritus, is a local inflammation caused by duodenal hookworm (Ancylostomaduodenale) or American hookworm (Necatoramericanus) when drilling into the skin. The eggs hatch into rod-shaped mites in 1 to 3 days. This fashion has no infection ability, and after 5 days, the skin becomes silky. When it is in the vegetable garden, orchard, tea garden, plantation park and mining area, it is possible. Upon entering the skin, it is stimulated by the temperature of the skin, and immediately exhibits an active drilling activity, which is invaded into the skin through the hair follicle, sweat gland pores or thinner parts of the skin, and then causes an acute inflammatory reaction in the drilled part. basic knowledge The proportion of illness: 0.001% Susceptible people: more common in farmers Mode of infection: non-infectious Complications: Asthma Urticaria

Cause of hookworm dermatitis

(1) Causes of the disease

The eggs are excreted in the soil with the patient's feces. When the temperature is appropriate, the eggs become hat-shaped after 1 to 3 days. This fashion has no infection ability, and after 5 days, the skin becomes silky, when it is in the vegetable garden. When the orchard, tea plantation, plantation park and mining area are barefoot, it is possible to enter the skin and be stimulated by the skin temperature. It immediately shows active drilling activity, usually invading the skin through the hair follicles, sweat gland pores or thinner parts of the skin, and then The drilled part causes an acute inflammatory reaction. Hooks can secrete a kind of hyaluronic acid, which can dissolve keratin, collagen and elastin. It can damage the skin and penetrate the hair follicle. After invading the skin, it can cause skin allergic reaction.

(two) pathogenesis

The eggs hatch into rod-shaped mites in 1 to 3 days. This fashion is non-infectious, and it is silky scorpion after about 5 days. When it is in the vegetable garden, orchard, tea garden, plantation park and mining area, it is possible. When entering the skin, it is stimulated by the skin temperature and immediately shows active drilling activity. It usually invades the skin through the hair follicle, sweat gland pores or thin skin parts, and then causes acute inflammation in the drilled part. Hyaluronic acid, which can dissolve keratin, collagen and elastin, damages the skin and penetrates the hair follicle. It can cause skin allergic reaction after invading the skin. It has a burning tingling in some places. Red pimples may appear in a few minutes to 1 hour, and some form blisters. If there is a secondary infection, pustules can form. A few patients can also form ulcers. Sometimes patients can develop urticaria. If more hooks are drilled at the same time, asthma can occur after about 1 week.

Hookworm dermatitis prevention

Extensively carry out prevention and treatment of hookworms, do not go to the stool, do not harm the stool, do not barefoot in the epidemic area, apply protective agents if necessary, such as 2.5% white peony aqueous solution, dibutyl phthalate or vegetable oil plus salt Hand and foot, eliminate the source of infection, and treat patients with hookworms in large areas in endemic areas.

Hookworm dermatitis complications Complications, asthma, urticaria

Asthma can occur, ulcers can form, and sometimes urticaria can occur in patients.

Hookworm skin inflammation symptoms common symptoms papules pustular eosinophilia

After the filamentous sputum is drilled into the skin, there is a local itching sensation. Red pimples may appear within a few minutes to 1 hour, and some may form blisters. If there is a secondary infection, pustules may form, and a few patients may form ulcers, sometimes Patients may have urticaria. If more hooks are drilled at the same time, symptoms such as asthma, cough, fever, etc. may occur after about 1 week, and eosinophils may increase in blood or sputum. Hook, it is easy to find eggs in the feces after the month.

Check of hookworm dermatitis

Eosinophils in blood or sputum, and it is easy to find hooks in the sputum of asthma. After the month, the eggs are easily found in the feces.

Smear examination.

Diagnosis and identification of hookworm dermatitis

diagnosis

More common in farmers, especially vegetable farmers, mulberry farmers, summer or early autumn is prone to the onset of hot and humid seasons, barefoot walking before the onset, field labor or exposure to feces, skin lesions are more common in the toes, ankles and insteps, etc., typical Clinical manifestations.

Differential diagnosis

The disease should be differentiated from the hand and foot sputum. The former is mostly on the edge of the hand and foot. The onset is acute and the fecal history is exposed. The latter is mainly caused by small blisters and fresh smear, and the fungus is positive.

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