Tick-borne diseases Flashcards

1
Q

Borrelia burgdorferi
vector
CS in humans
CS dogs

A

Lyme disease
vector = Ixodes (acquired from white-footed mouse)
CS in humans: erythema migrans (cutaneous rash)
CS in dogs: arthritis, lymphadenopathy, fever, anorexia

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2
Q

Ehrlichia
vector 1 carries what agent? what does it cause?
vector 2 carries what agent? what does it cause?
CS

A

vector 1 = Ambylomma

agent: Anaplasma phagocytophila (used to be called E. ewingii)
causes: Canine GRANULOCYTIC ehrlichiosis

vector 2 = Rhipicephalus

agent: Ehlirchia canis
causes: Canine MONOCYTIC ehrlichiosis

CS: fever, anorexia, edema of limbs, oral vesicles, petechiation, joint pain and swelling, aqueous flare and retinitis, hypoalbuminemia, increased ALP

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3
Q
Rocky Mountain Spotted Fever
agent
vector
CS
pathogenesis
A

agent: Rickettsia rickettsii
vector: Dermacentor
CS: same as ehrlichia (fever, edema of limbs, oral vesicles, joint pain, etc) BUT RMSF has a clinical course >2 weeks
patho: vasculitis!

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4
Q
Francisella tularensia
how are cats and dogs infected?
vector?
zoonotic?
which animal is relatively resistant?
CS
A

Tularemia
cats and dogs infected by close contact with RABBITS
vector = ticks
zoonotic - potential biowarfare agent
the dog is relatively resistant
CS: depression, fever, anorexia, lymphadenopathy, oral ulceration

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5
Q

Cytauxzoon felis
vector
CS
what does it look like?

A

vector = dermacentor
CS: almost 100% fatal - dark urine, icterus, fever, DIC, anemia
- ring-shaped organism in RBCs or schizonts in spleen, liver, bone marrow, etc.

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6
Q
Anaplasma marginale
seen in what animal
how is it transmitted?
what does it cause? 
tx
A

cows
any blood feeding insect but mostly ticks
causes extravascular hemolysis but NO hemoglobinuria (which is how you differentiate it)
tx: oxytetracycline

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7
Q
Babesia
animals effected
vector
what does it cause
which animals are predisposed?
tx
A
cow, dogs and horses 
vector: BOOPHILUS ticks
causes RBC destruction --> anemia and thrombocytopenia
- greyhounds and pit bulls predisposed
tx: imidocarb
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8
Q

Ehrlichia ruminantium
what is the disease?
vector?
what does it cause?

A

Heartwater disease
vector: Amblyomma - seen in Africa and west indies
causes fatal encephalitis in ruminants

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9
Q

Epizootic bovine abortion (EBA)
common name for disease?
vector?
CS?

A

foothills abortion (CA foothills)

  • vector: Ornithodoros coriaceus (soft tick)
  • CS: aborted fetus showing large LN and spleen, destructed thymus
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10
Q

Otobius megnini
what kind of tick?
where does it like to live and on what animal?

A

soft tick

likes ears, cattle rub and scratch at ears

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