Term
| Name 4 Superficial mycoses MOs |
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Definition
Malassezia furfur
Hortaea werneckii
Piedraia hortae
Trichosporon beigelii |
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Term
| Which Superficial mycoses MO has KOH prep = "Spaghetti & Meatballs" |
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Definition
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Term
| Malassezia furfur is attributed to what type of Ringworm? |
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Definition
| Tinea versicolor / Pityriasis versicolor |
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Term
| What does Malassezia furfur require to grow? |
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Definition
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Term
| What can you supplement your Sabs/other media with to get Malassezia furfur to grow? |
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Definition
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Term
| What are the 2 special media used for Malassezia furfur? |
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Definition
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Term
| Tinea niger is caused by which MO? |
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Definition
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Term
| Black Peidra is caused by which MO? |
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Definition
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Term
| White Piedra is caused by which MO? |
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Definition
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Term
| Which superficial mycoses produces a hard dark brown nodule on shaft? |
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Definition
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Term
| Which superficial mycoses produces a nodule that is easy to crush and appears yellow or pale brown? |
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Definition
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Term
| What is Tinea niger/Hortaea werneckii in nature? |
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Definition
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Term
| How would you diagnose Hortaea werneckii? |
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Definition
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Term
| Can you diagnose Piedraia hortae microscopically? |
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Definition
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Term
| Which superficial mycoses infects axillary, facial, genital, and scalp hair? |
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Definition
| Trichosporon beigelii / White Piedra |
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Term
| What are the 3 genera of Dermatophytes causing infections? |
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Definition
Microsporum
Epidermophyton
Trichophyton |
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Term
True or False:
Dermatophytes are involved in the destruction of the skin, hair, and nails |
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Definition
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Term
Define the following:
Anthropophilic |
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Definition
| Prefers to grow on humans rather than other animals of in the soil |
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Term
Define the following:
Zoophilic |
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Definition
| Preferential host is an animal other than humans |
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Term
Where would you find the following:
Tinea capitis |
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Definition
|
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Term
Where would you find the following:
Tinea corporis |
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Definition
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Term
Where would you find the following:
Tinea unguium |
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Definition
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Term
Where would you find the following:
Tinea cruris |
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Definition
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Term
Where would you find the following:
Tinea pedis |
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Definition
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Term
Where would you find the following:
Tinea barbae |
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Definition
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Term
| Dermatophytes: Hair - Certain fungi produce _____ which under Woods lamp fluoresces |
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Definition
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Term
| What is characteristic of Microsporum infection? |
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Definition
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Term
Define the following:
Ectothrix |
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Definition
| Arthroconidia found outside of hair shaft |
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Term
Define the following:
Endothrix |
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Definition
| Arthroconidia found inside hair shaft |
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Term
Define the following:
Favus |
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Definition
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Term
| What 2 types of media would you use for a Dermatophyte? |
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Definition
Dermatophyte test medium (DTM)
Sabouraud dextrose agar w/antibiotics |
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Term
| How long do you incubate DTM? |
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Definition
|
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Term
| At what temperature do you incubate DTM? |
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Definition
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Term
| DTM - Yellow indicator becomes _____ if dermatophyte grows |
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Definition
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Term
|
Definition
| Bacteria & Some Saprophytic Molds |
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Term
| What are the 2 antibiotics associated with Sabouraud dextrose agar? |
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Definition
Cycloheximide
Chloramphenicol |
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Term
| Describe the Macroconidia if present for Trichophyton |
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Definition
| Smooth/Pencil thin, long, septate |
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Term
| In general how can you ID Trichophyton? |
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Definition
| Use Vitamin Requirements to ID |
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Term
| What type of media should you use for Trichophyton? |
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Definition
| Agar +/= specific nutrient thiamine/casein/inositol |
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Term
| Explain the Hair Perforation Test to ID T. mentagrophytes |
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Definition
1. Expose hair filaments to dermatophyte for 4 weeks
2. Examine with LPCB
3. Examine for wedge shaped perforations |
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Term
| Will T. mentagrophytes be positive or negative for wedge shaped perforations in the hair perforation test? |
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Definition
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Term
| Which MO is associated with Black dot ringworm? |
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Definition
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Term
| What is the leading in children? |
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Definition
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Term
Which Trichophyton is associated with the following:
Causes a variety of lesions in cattle & humans
Most often seen in farmers |
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Definition
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Term
Which Trichophyton is associated with the following:
Produces a black dot type of tinea capitis
Violet Reverse side of colony |
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Definition
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Term
| What is the color of the reverse side of the T. violaceum species? |
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Definition
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Term
| What does T. schoenleinii cause? |
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Definition
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Term
| Describe a Favic type of hair infection |
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Definition
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Term
| Are Microconidia rare or very much present in T. schoenleinii? |
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Definition
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Term
| Describe the appearance of the hyphae of T. schoenleinii |
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Definition
| Knobby & club-shaped at terminal end |
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Term
| What morphology is characteristic of T. schoenleinii? |
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Definition
| Antler hyphae or Favic chandeliers |
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Term
| Describe the Macroconidia of Microsporum |
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Definition
Large
Spindle-shaped
Rough-walled
Thick walls |
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Term
| Describe the Microconidia of Microsporum |
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Definition
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Term
| Which MO is the most common cause of ringworm in dogs & cats in the U.S.A.? |
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Definition
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Term
| What is the color of the Reverse of colony of M. canis? |
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Definition
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Term
| Describe the Macroconidia of M. canis |
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Definition
Spindle-shaped with tapered ends
Echinulate (warty projections) |
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Term
| How do you usually ID M. audouinii |
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Definition
| Exclusion of other dermatophytes |
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|
Term
True or False:
M. audouinii Conidia are rare and the Macroconidia, if present, are bizarre shaped |
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Definition
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|
Term
True or False:
M. gypseum rarely causes human/animal infection |
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Definition
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Term
| Where can M. gypseum be found? |
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Definition
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Term
| Describe the Macroconidia of M. gypseum |
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Definition
Spindle-shapes macroconidia
Ends NOT Tapered |
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Term
| What is the one species of Epidermophyton? |
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Definition
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Term
| What is E. floccosum sensitive to? |
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Definition
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Term
| What should you do/not do for Epidermophyton specimens submitted for dermatophyte culture? |
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Definition
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Term
| Describe the Microconidia of Epidermophyton |
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Definition
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Term
| Describe the Macroconidia of Epidermophyton / E. floccosum |
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Definition
Beaver-Tail (Club-shaped)
Rounded at tip
Thin-Walled
Multiseptate |
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