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Question 1

1. fever + resp signs = ?

Answer 1

1. influenza, rhinopneumonitis (EHV), rhinovirus, strangles, EVA

(tuberculosis, AHS, pneumocystis)

Question 2

1. fever + neuro signs?

Answer 2

1. (rabies), EEE, WEE, WNV (VEE)

many diseases with vasculitis component (EHV1, EIA, EVA, anaplasma, strangles)

(lyme disease)

Question 3

1. fever + multisystemic? (fever not always present)

Answer 3

1. anaplasma phagocytophilum (erlichia equi), EIA, EVA, lyme disease

(babesia, anthrax)

Question 4

1. Fever + edema?

Answer 4

1. common combo, often from vasculitis, not always infectious

Question 5

1. potential sources of edema?

Answer 5

1. heart failure (^HR, venous congestion)
2. hypoalbuminemia (loss via kidney, gut, body) or via liver dz
3. lympahgitis, lymphatic obstruction, lymphosarcoma, vasculitis, cellulitis
4. toxins (hairy alyssum)
5. contact dermatitis (wild parsnips, fire ants, rattlesnakes, spiders, BUG SPRAY)

Question 6

1. Cx of purpura hemorrhagica?

Answer 6

1. edema of head/extremities/ventrum, petechia on MM, +/- uticarial plaques exuding serum, +/- edema of larynx/lungs -> resp distress, +/- diarrhea, colic, acute rhabdo

painful, slough skin/hooves, may get DIC -> bleeding/thrombosis

Question 7

(Purpurra hemorrhagica)

1. Dx?
2. tx?

Answer 7

1. usually only need hx and Cx (hx of strangles)
2. penicillin (for strep), corticosteroids (for immunosuppression)

(dexameth may cause laminitis, teratogenic)

Question 8

(EIA)

(clinical signs)

1. acute?
2. subacute/chronic?
3. chronic asymptomatic?
4. Dx?

Answer 8

1. 7-30 days: NO ANEMIA, fever, depression, anorexia, petechia
2. > 30 days: classical signs: anemia, icterus, edema, wt loss
3. none - recrudescnce possible
4. serology (Ag p26 - 10-14 days for seroconversion)

Coggins (AGID: 45 days for +)

ELISA (fast - can’t export)

Question 9

(EVA - political importance (abortion))

1. primary concerns?

(Cx (depends on dose/strain/susc))

2. what 3 systems affected?
3. what are more common signs?

4 less common?

5. repro signs in mare?
6. stallions?

how many become long term carriers?

(more)

7. transmission?
8. Dx?
9. common in what breeds?
10. control?
11. vx?

Answer 9

1. abortion, export restrictions
2. repro/resp/skin
3. (mostly nothing) fever (106), edema, rhinitis/conjuctivitis, uticarial rash, papular erosions insdie upper lip
4. abortion, resp distress
5. abortion (3-10 mo), mare may show no signs (NO impact on future fertility), weak foal
6. if ill: reduce libido/fertility

30-60% (vas deferens)

7. all bodily secretions, fomites (quarantine for 4 weeks)
8. Cx not sufficient, Autolyzed fetus (non with EHV-1) - other normal stuff
9. standard/warm
10. centered on stallion breeding farm
11. yes: only control Cx (not infection) - isolate after giving

Question 10

(Lyme Disease)

1. Cx?
2. Dx?
3. Tx?
4. control?

Answer 10

1. most often subclinical, hyperesthesia (most common), arthritis, lameness, encephalitis/uveitis, abortion, cardiomyopathy, renal dz
2. rule out other stuff
   serology: multiplex (A: before infection, B: initial C: chronic)

culture (joint fluid), histo

3. oxytetracyline IV (doxycyline, penicillin)

NSAIDS to reduce inflammation

4. not contagious, control vector

Question 11

(pigeon fever)

1. common west coast (drought areas), causes external abscesses in brisket area (hence the name)
2. principle route of infection?
3. three main Cx?
4. Tx?
5. Prog?

Answer 11

2. insect transmission
3. **cellulitis and ulcerative lymphanginitis **(edema, ulceration, draining tracts)

**abscesses **(thick/deep/slow to mature - copious brown fluid - painful/firm -> internal abscesses are bad)

can cause purpurra

4. patience, lance abscesses, penicillin/TMF +/- Rifampin AFTER LANCING)
5. good if simple abscess, bad if internal