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Clinical Dermatology > Food Animal Dermatology > Flashcards

Food Animal Dermatology Flashcards

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Dermatology Board Prep flashcards
1
Q

how many types of bovine papilloma virus are there?

A

6

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2
Q

where can bovine papilloma virus cause warts?

A

head, neck, trunk
teat-end
alimentary
genital

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3
Q

how long do warts usually last?

A

self-limiting
1-8 months

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4
Q

what causes ringworm in cows?

A

Microsporum sp
Trichophyton sp

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5
Q

what does ringworm cause in cows?

A

non-pruritic crusting alopecia
young: 2 months to 1 year

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6
Q

is cow ringworm zoonotic?

A

yes

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7
Q

how can you treat cow ringworm?

A

topicals: iodine, bleach
systemics: sodium iodide

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8
Q

what color does the indicator change to in the presence of dermatophytes in DTM?

A

red
due to alkaline change in medium

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9
Q

what are the three ways a cow can have photosensitization?

A

primary: liver failure
secondary: phylloerythrin (consume)
congenital

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10
Q

how can you treat photosensitization in cows?

A

remove from sunlight
look for primary agent or reason for liver disease

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11
Q

what is the agent of rainscald/dermatophylosis?

A

Dermatophilus congolensis

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12
Q

how can you treat rainscald?

A

remove crusts
wash with disinfectant shampoo
+/- systemic antibiotics

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13
Q

what does squamous cell carcinoma look like?

A

pink, cobblestone mass at mucocutaneous junction

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14
Q

what agents cause udder rot?

A

Fusobacterium
Bacteriodes
T. pyogenes

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15
Q

what are the agents of warble grubs?

A

Hypoderma lineatum
Hypoderma bovis

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16
Q

what are the signs of warble grubs?

A

spinal cord signs or bloat
stampeding
swellings on back

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17
Q

what are the two types of lice?

A

Anaplura: suckers
Malophaga: biters

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18
Q

what are the signs of pediculosis- lice?

A

pruritus
anemia
failure to thrive

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19
Q

which types of mange are reportable?

A

sarcoptic
psoroptic

20
Q

how is mange/scabies spread?

A

direct contact

21
Q

what does chorioptic mange look like?

A

tail mange

22
Q

how can you treat mange/scabies?

A

systemic: ivermectin
topical: amitraz or moxidectin

23
Q

how can you control cutaneous myiasis- blowfly strike?

A

crutch
dock
control diarrhea
control fly populations

24
Q

what causes contagious ecthyma/orf/soremouth?

A

parapox virus

25
Q

what causes warts?

A

bovine papilloma virus types 1-6
young: 6months to 2years

26
Q

how can you vaccinate for warts?

A

autogenous
commercial

27
Q

does dermatophytosis survive in the environment?

A

yes

28
Q

how can you diagnose dermatophytosis?

A

KOH prep
DTM

29
Q

how do you perform a KOH test to look for dermatophytosis?

A

scrape sample
cover with 10-20% KOH
15 minutes to gently heat
observe for hyphae and spores

30
Q

what is congenital porphyria/pink tooth like?

A

photosensitization, anemia, poor growth
photoactive molecules deposited in skin and teeth

31
Q

how doe secondary photosensitization agents work?

A

pyrrolizidine alkaloid toxicity

32
Q

what leads to rainscald?

A

normal flora
moisture and prior skin damage

33
Q

what leads to squamous cell carcinoma?

A

age
lack of pigment
exposure to sunlight

34
Q

how can you treat squamous cell carcinoma?

A

surgical removal
cryotherapy
sooner the better: locally invasive, 10% metastatic

35
Q

how can you treat udder rot?

A

clean
apply drying agent

36
Q

who is lymphosarcoma skin form seen in?

A

less than 3 years old
unrelated to bovine leukosis virus

37
Q

what do warble grubs do?

A

larvae burrow through skin and migrate
overwinter in cow
migrate to subcutaneous in sspring
pupate during summer and leave

38
Q

what should you be careful of with warble grubs?

A

when you deworm: do not in winter, because larvae overwinter around spinal cord and esophagus

39
Q

what does sarcoptic mange look like?

A

intense pruritus

40
Q

what does psoroptic mange look like?

A

intense pruritus

41
Q

what does demodectic mange cause?

A

nodules

42
Q

what causes sheep ked?

A

Malophagus ovinus
wingless flies

43
Q

what is the true screwworm?

A

Cochliomyia hominivorax
reportable
attacks healthy tissue

44
Q

how long do scabs from contagious ecthyma remain contagious?

A

up to 15 years

45
Q

is contagious ecthyma/orf/soremouth zoonotic?

A

yes

Clinical Dermatology (16 decks)

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