Fungal Skin Diseases Flashcards

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1
Q

Cutaneous Clinical Signs of:

Histoplasmosis

A
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2
Q

Cutaneous Clinical Signs of:

Coccidioides

A
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3
Q

Cutaneous Clinical Signs of:

Cryptococcus

A
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4
Q

Cutaneous Clinical Signs of:

Blastomyces

A
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5
Q

describe cytologic appearance of Malassezia

A

oval, budding yeast

snowmen, peanuts, shoes

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6
Q

is malassezia seen more often in dogs or cats

A

dogs

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7
Q

what cat species are over represented when is comes to Malassezia dermatitis

A

Devon Rex and Sphynx

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8
Q

Clinical Presentation of malassezia dermatitis

A
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9
Q

treatment of malassezia dermatitis

A

mainly topical via antifungal shampoos like ketoconazole/miconazole, but can also be systemic

don’t let clients use Head and Shoulders shampoo

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10
Q

what systemic therapy for malassezia dermatitis can be given to dogs but NOT cats?

A

ketoconazole

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11
Q

“rose growers” mycoses?

A

Sporotrichosis!

traumatic inoculation of contaminated soil, plants, or organic matter

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12
Q

appearance of Sporothrix on cytology

A

numerous intracellular cigar-shaped yeasts with halos

cytology is easy to do and find

clustered inside this macrophage and I think it looks so cool
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13
Q

clinical signs of sporotrichosis

A

ulcers, nodules, crusts

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14
Q

is sporothrix contagious?

A

yes, cats typically will transmit to dogs or humans

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15
Q

3 Most Common Dermatophytes in Dogs and Cats

A
  1. Microsporum canis
  2. Microsporum gypseum (now N. gypseum)
  3. Trichophyton mentagrophyte
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16
Q

are dermatophytes contagious?

A

uh, duh

most typically M. canis

17
Q

colloquial term for dermatophytosis

A

ringworm

18
Q

where is ringworm typically found

in terms of on the body, lesion distribution?

A

where keratin is in a constant state of turnover

stratum corneum, nails, anagen hairs

19
Q

how are dermatophytes trasnmitted?

A

can enter via trauma or any disruption to the skin barrier

20
Q

here are some pictures of the clinical presentation of ringworm

A
21
Q

ways to diagnose ringworm

A

woods lamp
trichogram
mackenzie toothbrush and DTM
PCR

22
Q

what % of M. canis will glow under a woods lamp?

A

~50-60%

23
Q

what does ringworm look like on a trichogram?

A

rotten logs

24
Q

when DTM has incubated and you put a sample on a slide, what does ringworm look like under a microscope?

A

blue canoes!

25
Q

define

yeast

A

single-celled organism that reproduces by budding

26
Q

define

mold

A

multicellular fungal filaments “hyphae;” often grow in fluffy colonies

27
Q

define

dimorphic fungi

A

fungi which can exist in either yeast OR mold form

28
Q

define

dermatophytes

A

fungi which infect keratinized tissues including skin, hair, claws/hooves, feathers, quills

29
Q

common cat species that get ringworm

A

Persians and ragdolls