Cryptoptera dermatitis

Introduction to occult dermatitis Insect-like insect steel, Coleoptera, which is a black ant-shaped small beetle with a body length of 0.6-0.8 cm. I usually inhabit the fields and grasses, and I like to fly around the lights at night, biting people and animals. There is no venom gland in the larva, but there is a toxin in the worm. When the worm stays on the human skin, it does not cause dermatitis, but it is only broken or crushed, so that the worm contains a strong acidic venom (pH1 2) Contact with the skin and cause a dermatitis reaction within a few hours. The light weight of the reaction is related to the amount of exposure to the venom. Therefore, the disease is caused by people consciously or unconsciously tapping the stag beetle that stays on the skin. basic knowledge The proportion of illness: 0.0054% Susceptible people: no special people Mode of infection: non-infectious Complications: headache

Cause of occult dermatitis

(1) Causes of the disease

When the human body beats and damages the insect body, the venom in the insect body contaminates the skin, which can cause acute dermatitis, the pain is severe, and the severe reaction can occur.

(two) pathogenesis

The worm contains a strong acid (pH 1-2) venom. When the body beats and damages the worm, the venom contaminates the skin, which can cause acute dermatitis. The pain is severe and the systemic reaction may occur in severe cases.

Prevention of occult dermatitis

1. Initiate the masses to remove weeds, dead wood, garbage from the surrounding houses, and destroy the habitats and breeding sites of the poisonous stag beetles. Do not stack waste materials indoors, keep the room clean and tidy, and make the poisonous stag beetles that invade the room have no hidden places.

2. Install the screen door and screen window in summer to prevent the poisonous stag beetle from flying into the room and reduce the chance of the human body contacting the insect.

3, in the summer season, do not open the window to turn on the light to sleep, use mosquito nets or minimize the body's exposure, can effectively prevent the poisonous stag beetle stunned people to fall asleep after injury to the human body, causing dermatitis.

4. Spraying indoor and surrounding environment with insecticides such as hydrogen bromide or struggling cockroaches can effectively kill indoor and outdoor poisonous worms.

5. When the toxic stag beetle is crawling on the body, do not pat it with your hands, lick it, gently blow it off or use other things to remove the worm. If your hands have been in contact with the debris, wash them off with soapy water.

6. Strengthen the propaganda of knowledge about poisonous stag beetle dermatitis, and tell the masses not to play in the light under the light. If you have to, wear masking clothing or use insect repellent.

Complications of occult dermatitis Complications

After several hours to 2 days of exposure to venom, strips, flaky or clustered edematous erythema appear locally, on which dense papules, blisters and pustules are scattered, and some of the central pustules are merged into pieces, which can be followed by erosion and scarring. Epidermal necrosis, severe inflammation, severe reaction or a wide range of patients, often accompanied by headache, dizziness and fever and other systemic symptoms, superficial lymph nodes can be swollen.

Symptoms of echinococcosis common symptoms dizziness, pimples, fever, pustules

The skin lesions are erythema, pustules, strips, spots and flaky, strips (one or more) or irregularly arranged small pustules, very similar to the shape caused by secondary infection of the skin after being stabbed by a bamboo stick. The dots are like mung beans or slightly larger red papules and plaques. There may also be small pustules on the surface. They are scattered or arranged in strips or clusters. They invade the face and the neck. Upper, lower limbs and trunk, genital skin is often involved, flaky lesions are more common in the scrotum, and the marginal boundary is unclear.

A small number of skin lesions, inflammation compared with patients, often with headache, dizziness and fever and other systemic symptoms, superficial lymph nodes can be swollen, patients often feel intense burning and itching, usually recovered within 1 to 2 weeks, The pigmentation is later or the spots are reduced.

Examination of occult dermatitis

A skin test can be performed.

Diagnosis and identification of occult dermatitis

diagnosis

According to the season of good hair (from June to September of each year) and typical clinical manifestations (more than the skin lesions found after getting up in the morning, the affected parts are exposed to the face, neck, chest, back and limbs), if the worms are found , you can confirm the diagnosis.

Differential diagnosis

The disease needs to be differentiated from contact dermatitis, acute eczema, pyoderma.

1. Eczema: The rash is pleomorphic and symmetrical, generally without a cord-like arrangement, and the damage boundary is unclear, mainly pruritus.

2, impetigo: more common in children, more common in late summer and early autumn, for blisters, pustules, no formation of cord-like damage, conscious itching.

3, contact dermatitis: damage is a clear edematous erythema, which is basically the same size of papules or blisters, and even bullae, often have a history of exposure to sensitizers.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.