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15 Cards in this Set
- Front
- Back
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If dermatophyte fungal infection is suspected, what test should be preformed?
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Potassium hydroxide (KOH) wet mount.
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What would you expect to see if the KOH is positive?
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Branching Hyphae
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What organism would you expect to find reom a specimen collected from a child w/honey colored crusted vesicles on the face?
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(impetigo) staph or strep
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What is acid fast bacillia cultrue/stain used to identify?
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Organisms of the genus Mycobacterium.
(TB of the skin) |
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What expensive test could be ordered to identify Herpes simplex, zoster or varicella?
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Tzanck smear or tzanck test.
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How would you prepare a Tzanck smear?
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Unroof the vesicle, scrape the lesion, smear on the appropriate slide & let air dry.
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Explain what a Tzanck smear is;
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Giemsa & Wright stains are used to identify giant epithelial & multinucleated giant cells found in Herpes family dzs.
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What is the most frequently isolated virus?
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Herpes Simplex
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What to remember about collecting viral culture?
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Virus' are fragile, transport to the lab ASAP, don't use wooden aplicators w/cotton swabs.
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Does tinea capitis flourese under the wood's lamp?
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not usually
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What is diascopy?
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Pressing a slide against a lesion to see if it blanches w/pressure. If so it is usually due to dilated capillaries.
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When doing a punch biopsy which layers of the dermis should you collect?
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epidermis
dermis subQ |
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What lesion is a wedge biopsy usually done on?
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Nodule
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When doing a wedge biopsy what is removed?
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A large wedge of tissue down to the subQ layer.
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Where do you send a wedge biopsy?
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1/2 to pathology/histology
1/2 for bacterial & mycotic culture. |
