Are cosmetic fungal infections of the skin or shaft

- No living tissue invaded - No cellular response from the host - No pathological changes elicited

Causative agent: Malassezia furfur

Characterized by scaly patches of hypo to hyper pigmentation of skin of moist humid areas

Tinea Versicolor other term?

Noninflammatory and Nonpruritic (rarely pruritic) Lesions

Areas rich in sebaceous glands are commonly involved

Seborrheic dermatitis Atopic dermatitis Folliculitis Disseminated infection

Dandruff in adults; Cradle cup in babies

Laboratory Diagnosis: Specimen used for Tinea Versicolor?

Laboratory Diagnosis Microscopic examination uses for Tinea Versicolor?

Microscopic Examination: - Cluster Budding yeast - Spaghetti and meatballs appearance

Culture · No growth in routine fungal culture medium ·Yeast like colonies may observed only after the culture medium is overlaid with olive oil

- Cream-colored, moist, and smooth - SDA culture with olive oil overlay: Fried egg colonies appear

Tinea Versicolor urease?

Wood's lamp - golden yellow fluorescence

Wood's lamp - golden yellow fluorescence

golden yellow fluorescence

Causative agents: Hortaea werneckii Exophiala werneckii Phaeoannellomyces werneckii

Characterized by painless, black, non-scaly patches present on the palm and sole; more commonly in females.

Caused by a black colored yeast-like fungus - Hortaea wernecki

Caused by a black colored yeast-like fungus

Treatment: Topical ketoconazole cream

Tinea Nigra uses what type of specimen for laboratory diagnosis:

Microscopic examination ·Branched, septate hyphae ·2 celled oval yeast cells with melanized cell walls

Culture ·Black, yeasty colonies · Develop short olive gray mycelia with age

- Infection of the hair shaft that produces hair breakage - Due to poor personal hygiene - May disseminate in immunocompromised individuals

Fungal infection of facial, axillary, or genital hairs

·Less commonly the scalp

Causative agent: Trichosporon spp.

Soft, white, yellowish, beige, or greenish nodules on the hair shaft

Less firmly attached

White Piedra uses what type of microscopic examination?

- Intertwined hyaline septate hyphae - Breaking up into oval or rectangular arthroconidia

Culture: SDA or PDA

- Raised, waxy appearance colonies - Radial furrow and irregular folds

White Piedra is a urease?

The white Piedra also mounts?

- Showed septate hyphae, arthroconidia and budding blastoconidia

- Fungal infection of the hair scalps

Less commonly in beard and pubic areas

Causative agent: Piedraia hortae

Black Piedra, Causative agent:

Hard, dark brown to black gritty nodules on hair shaft

carbonaceous; can house an asci

Firmly attached to the hair shaft

Black Piedra uses what type of specimen?

Black Piedra uses what type of microscopic examination?

- Compact masses of dark, septate hyphae - Round to oval asci containing 2-8

Culture: SDA

Black Piedra Culture:

Nodules: Over and around the hair shaft, hard, difficult to detach from the hair

Nodules: On the surface of the hair shaft, softer, easy to separate from hair

Piedraia hortae

Trichosporon spp.

Direct Examination: Arthrospores and blastospore can be seen

Direct Examination: Tightly packed dichotomous branched hyphae

Presence of asci: Negative

Presence of asci: Positive

A lipophilic fungus