Pityrosporum folliculitis

Introduction to Pityrosporum Folliculitis Pityrosporum folliculitis is a skin follicular fungal infection caused by round or oval bacillus, officially reported and named by Potter in 1973. More common in young patients. Skin lesions are isolated red denim follicular papules or pustules, which can be diagnosed by excluding bacterial folliculitis, acne vulgaris, papular cutaneous candidiasis, eosinophilic pustular folliculitis and other diseases. Ketoconazole tablets can be taken orally if the damage is extensive or severe. basic knowledge The proportion of illness: 0.025% Susceptible people: more common in young patients Mode of infection: non-infectious complication:

The cause of pityrosporum folliculitis

(1) Causes of the disease

Pityrosporum folliculitis is a skin follicular fungal infection caused by round or oval bacillus.

(two) pathogenesis

After the pathogen invades the skin, it grows and grows in the hair follicle, causing isolated red dome follicular papules or pustules, 2 to 4 mm in size, and severe pust formation.

Pityrosporum folliculitis prevention

1. Develop good personal hygiene habits, do a bathing, and change underwear.

2. Reasonable nutrition, the disease can be induced by malnutrition, and patients who are treated with corticosteroids should pay attention to observe and prevent the disease.

Pityrosporum folliculitis complications Complication

Pityrosporum folliculitis is a skin follicular fungal infection caused by round or oval bacillus.

Pityrosporum folliculitis symptoms Common symptoms Pustular papules itching

More common in young patients, the skin lesions are isolated red denim follicular papules or pustules, 2 to 4 mm in size, occur in areas rich in sebaceous glands such as the back, chest, occasionally on the shoulders, arms, calves, face and Neck, etc., severely have a pus formation, containing pathogens, called acniform pityriasis folliculitis, chronic disease, skin lesions have varying degrees of itching, sometimes burning or tingling, can be associated with hemorrhoids And the presence of tinea versicolor, local or systemic use of corticosteroids or antibiotics is easy to trigger (Figure 1).

Examination of pityrosporum folliculitis

Scraping damage or pus under microscope. Direct microscopic examination showed a large number of round, oval thick-walled spores, 2 to 5 m in diameter, some have "germination", often aggregated into heaps, sterile silk, culture requires lipid culture Base, there is the growth of pityrosporum, because pityrosporum is the normal flora of human skin, sebaceous glands are active to promote the growth of lipophilic pityrosporum, so direct microscopic examination and fungal culture are generally not used as a diagnostic routine.

Histopathology revealed that there were a large number of round or oval thick-walled spores in the enlarged hair follicle cavity in the same shape as the direct microscopic examination.

Diagnosis and identification of pityrosporum folliculitis

Diagnostic criteria

According to the skin lesions, the red dome of the follicular papules or pustules, 2 to 4 mm in size, occurs in the area rich in sebaceous glands as above, the front chest, occasionally on the shoulders, arms, calves, face and neck, etc. Severe cases have pus formation, containing pathogens, called acniform pityriasis folliculitis, chronic disease, skin lesions have varying degrees of itching, sometimes burning or tingling, scraping damage or pus Microscopic direct microscopic examination showed a large number of round, oval thick-walled spores, 2 ~ 5m in diameter, some have "germination", often aggregated into heap, sterile silk, culture requires lipid-containing medium, growth of Fusarium Histopathology shows that there are a large number of round or oval thick-walled spores in the enlarged hair follicle cavity. The morphology is the same under direct microscopic examination, excluding bacterial folliculitis, acne vulgaris, papular cutaneous candidiasis, eosinophilic pustules. Diseases such as folliculitis can be diagnosed.

Differential diagnosis

Pityrosporum folliculitis should be distinguished from bacterial folliculitis, acne vulgaris, papular cutaneous candidiasis, eosinophilic pustular folliculitis and other diseases.

Bacterial folliculitis is caused by bacteria, the onset is acute, the course of disease is short, the damage is red hair follicle papules, the top is rapidly purulent, and the periphery is surrounded by redness, mainly with itching pain. Acne vulgaris is usually used on the face, upper chest and back. Typical blackhead damage, papular cutaneous candidiasis damage looks like Fusarium folliculitis, but the former hemispherical papules often accompanied by ring-shaped desquamation, patients are mostly fat infants, direct microscopic examination of pseudohyphae and spores Eosinophilic pustular folliculitis is an unexplained hair follicle papule pustular lesion, mainly male, accompanied by a significant increase in eosinophils in the peripheral blood, up to 40%, effective oral or topical corticosteroids.

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