demodicosis
Introduction
Introduction to Demodex Demodex mites, also known as "coccidiosis" or "lipid worms", is a common and persistent skin disease caused by Demodex mistletoe in the sebaceous glands and hair follicles of dogs and cats. All kinds of Demodex have their own specific hosts, and they do not cross infection. The main features are hair removal, dermatitis, sebaceous gland inflammation and folliculitis. basic knowledge The proportion of sickness: 0.009% Susceptible people: no special people Mode of infection: non-infectious Complications: genital itching
Cause
Cause of Demodex
(1) Causes of the disease
Demodex is a chronic inflammation caused by Demodex mistletoe in human hair follicles or sebaceous glands, also known as hair follicle dermatitis.
(two) pathogenesis
Whether or not Demodex can cause disease is still inconclusive. It may be due to differences in host individuals, which may cause different responses to sputum infections. Some people may have clinical symptoms, while some people do not show any clinical symptoms.
Prevention
Demodex disease prevention
Pay attention to the ventilation and dryness of the living room, warehouse, storage, container, container and grain, often exposed to strong light. If the mites are found, disinfect the insecticide. In addition, it is necessary to strengthen personal protection. After work, it is necessary to bathe and change clothes in time. The skin can be coated with 5% naphthol sulphur cream or acne sputum, benzyl benzoate sputum, etc., not only to prevent the invasion of mites, but also to kill mites.
Complication
Demodex complications Complications, genital itching
1 sputum rosacea: is a chronic inflammatory skin disease that occurs in the center of the face.
2 spastic blepharitis: subacute, chronic inflammation of the skin of the rim, eyelash hair follicles and their glands.
3 spastic external auditory canal pruritus.
4. Demodex can also cause seborrheic alopecia, perioral inflammation, genital itching and other skin diseases, but also mixed with sputum, epidermal cyst, basal cell carcinoma, tuberculosis leprosy and so on.
Symptom
Demodex rickets Symptoms Common symptoms Acne-like rash pustules
The main clinical manifestations are rosacea and acne-like rashes, such as hair follicle damage, erythema, pustules, and desquamation.
Examine
Demodicosis examination
Clinical skin examination: red papules on the skin and around the nose, as well as rosacea and acne-like rashes, such as hair follicle damage, erythema, pustules, and desquamation.
Pathological examination: hyperkeratosis of the skin, sebum accumulation can be seen, accompanied by infiltration of eosinophils, visible neutrophil infiltration with infection.
Other tests: blood routine, as well as microscopic examination of facial secretions.
Diagnosis
Diagnosis and identification of Demodex
diagnosis
According to the main clinical manifestations of rosacea and acne-like rash, such as hair follicle damage, erythema, pustules, desquamation, extrusion of the expanded hair follicles by extrusion of sebum, addition of potassium hydroxide or pure glycerol can be in the microscope Demodex is observed underneath and can be diagnosed.
Differential diagnosis
1. The papular urticaria rash often occurs suddenly, and has little to do with the season. It does not necessarily have a history of contact with grains and weeds, and it is not easy to find the worms.
2. Acne has a typical predilection site, and it is often found in the finger joints.
3. The incidence of chickenpox is mostly in the spring, more common in children, with a history of contact infection, rash is mainly blister, often has a pioneering symptoms before rash, no history of contact with cereals and weeds.
