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25 Cards in this Set
- Front
- Back
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TINEA
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Dermatophytosis caused by dermatophytes - a group of fungi that infect nonviable keratinized cutaneous tissues.
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What age group is primarily affected by Tinea Capitis?
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Ages 3 - 9
may also be concomittantly infected with Tinea Corporis |
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What age group is primarily affected by Tinea Pedis?
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Adolescents and young adults
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What are the factors that predispose a person to fungal infections?
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Warm, Moist, Occluded environments
Family History Compromised Immune system |
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By what vector are fungal infections spread?
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Person to person
Animal to person (prim. cats and dogs) Inanimate objects |
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Where do dermatophytes only grow?
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Only on or within keratinized structures.
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What 5 species commonly cause fungal infections?
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Trichophyton rubrum
Trichophyton tonsurans Trichophyton mentagrophytes Microsporum canis Epidermophyton floccosum |
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Where can the 5 common species of fungal infections be found?
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On:
Humans Animals In the soil |
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How do the 5 common fungal species produce fungal infection?
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Production of enzymes called keratinases that allow them to digest keratin, causing epidermal scale; thickened, crumbly nales; or hair loss.
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What are the general symptoms of fungal infections in hair and skin?
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Pruritis
Burning Stinging of the scalp or skin. Inflammatory dermal reaction: Erythema Vesicles |
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How is diagnosis of a fungal infection confirmed?
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10% potassium Hydroxide preparation (KOH)
Fungal culture Wood's lamp |
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How is a Potassium Hydroxide test used to confirm diagnosis of fungal infection?
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Lesion scale is scraped with No. 15 blade and placed on a slide.
KOH is added and the slide inspected under microscope. |
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What do fungi look like under a microscope?
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Rod-shaped filaments with branching.
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How is a Fungal Culture used to confirm diagnosis of fungal infection?
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specimen is applied to a dermatophyte test medium on an agar plate. If fungal the agar plate will change color from yellow to pink or red in approx. 2 weeks.
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How is a Wood's lamp used to confirm diagnosis of fungal infection?
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It produces a bright green fluorescence in the presence of a tinea infection caused by Microsporum species. Only identifies Microsporum species so test is limited.
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Which part of the body does Tinea Capitus affect?
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Head
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Which part of the body does Tinea Corporis affect?
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Body
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Which part of the body does Tinea Cruris affect?
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Groin
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Which part of the body does Tinea Manus affect?
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Hand
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Which part of the body does Tinea pedis affect?
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Foot
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Which part of the body does Tinea unguium (Onychomycosis) affect?
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Nails
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How does Tinea Capitis present?
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Generalized, diffuse seborrheic dermatitis-like scalp scaling.
Impetigo-like lesions with crusting and redness, areas of hair loss or broken hairs Possibly inflammatory nodules |
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Which ethnic group has a disproportionate amount of Tinea Capitis been diagnosed in?
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African-Americans
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Which fungus causes the most cases of Tinea Capitis? What is the percentage?
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90% of cases are caused by Trichophyton tonsurans.
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What are the other organisms involved with Tinea Capitis infection?
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Microsporum Audouinii is spread from human to human
Microsporum Cania spread from animals to humans. |
