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NAVLE-Equine A-Z Part 2
Equine A-Z Part 2
96
Veterinary Medicine
Professional
04/21/2009

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Term
What causes EPM?
Definition
Sarcocystis neurona; 2 host cycle with BIRDS AND OPOSSUMS, 1-6 yo
Term
What are signs of EPM?
Definition
vague multifocal asymmetric neuro signs with focal mm atrophy (quads and glutes), hyperreflexive, spastic, local sweating, head tilt, facial paralysis, circling, acute recumbancy if brainstem involved
Term
What lesions are associated with EPM?
Definition
asymmetric, nonsuppurative inflammatory lesions in brainstem, spinal cord; damage to grey and white matter
Term
How is EPM dx and tx?
Definition
Western blot (ab=exposure) on serum or CSF
PONAZURIL, TMS+Pyrimethamine, Nitazoxanide
Term
What is the etiology of Equine viral arteritis?
Definition
"epizootic cellulitis", "equine typhoid" TOGAVIRUS
spread by respiratory or venereal from infected semen
Term
What are signs of EVA?
Definition
VASCULITIS, COUGHING, SNOT-NOSED WITH PUFFY EYES AND LEGS, EDEMA, CONJUNCTIVITIS/RHINITIS, abortion-rare, fever, icterus
Term
Dx and tx of EVA?
Definition
VI ro PCR, naospharyngeal swab
quarantine, AB, supportive
Term
What are ddx for EVA?
Definition
EHV1, equine influenza
Term
How is EVA prevented?
Definition
maangement-test semen
MLVx prepubertal colts
Term
What are causes of choke?
Definition
PELLETED FEED, rapid eating, dental problems, esophageal stricture
Term
What are common choke location?
Definition
cranial esophagus, thoracic inlet, heart base
Term
How is choke treated?
Definition
mm relaxation (xylazine, torb, detomidine); careful lavage, fluids
Term
Encapsulated angiomatous mass found in OLDER horses?
Definition
ethmodi hematoma
Term
What are signs of ethmoid hematoma?
Definition
hemorrhage: intermittent unilateral epistaxis; 50% are bilateral
Term
What are tx for ethmoid hematomas?
Definition
4% formalehyde injection, sx
recurrance common
Term
What is exercise induced pulmonary hemorrhage and what causes it?
Definition
MOST racehorses
unknown: pulmonary hypertension, neovascularization, coagulopathy
Term
What are signs of EIPH?
Definition
exercise intolerance: IN SHORT PERIODS OF STRENOUS EXERCISE, hemorrhage in LRT, epistaxis, swallowing excessively, coughing
Term
What is tx for EIPH?
Definition
lasix
Term
what are causes of facial nerve paralysis in horses?
Definition
recumbent due to nerve compreesion on down side or halter during anesthesia
Term
What are signs of facial nerve paralysis?
Definition
IPSILATERAL LIP paralsysi with lip pulled OPPOSITE SIDE from lesion (contralateral)
weak/absent PALPEBRAL, DROOPED EAR
Term
Metacarpal-phalangeal joint
Definition
fetlock
Term
Ddx for fever and neuro signs:
Definition
rabies, WNV, EHV1, Encephalitities
Term
Inflammation of the SUPRASPINOUS BURSA (btw T2-T5)?
Definition
fistulous withers
Term
What causes fistulous withers?
Definition
ACTINOMYCES BOVIS, BRUCELLA ABORTUS
Term
How do you dx fistulous withers?
Definition
serum agglutination
Term
What are ddx for foal diarrhea?
Definition
foal heat diarrhea, Rhodococcus equi, clostridium perfringes ABC, cryptosporidium, strongyloides westerii, ROTAVIRUS
Term
How is strongyloides westerii diarrhea in foals spred?
Definition
mares transmit in milk, can migrate through the lungs, tx pp mare with ivermectin
Term
The most common cause of diarrhea in foals is:
Definition
rotovirus
Term
How does rotavirus cause diarrhea?
Clinical signs?
Definition
destroys absorptive intestinal cells in SI-->MALABSORTIVE DIARRHEA; depressed, anorexia, watery diarrhea
Term
Why are horses more prone to gastric ulcers?
Definition
CONSTANTLY secrete gastric fluid rather than just after a meal
Term
What are signs of glomerulonephritis in the horse?
Definition
PU
Term
What is the tx for glomerulonephritis in the horse?
Definition
low protein diet(decrease proteinuria and BUN), plasma transfusion, steriods
NOT Lasix (only for oliguric RF)
Term
What is the most common OVARIAN TUMOR of the horse?
Definition
granulosa-thecal cell tumor, benign
Term
What are signs of granulosa-thecal cell tumors?
Definition
infertility, abnormal sexual bx, large multicystic ovary/other is small, PREVENTS CYCLING because no gonadotrophin secretion
Term
What are the contents of the guttural pouch?
Definition
CN 7, 9, 10, 11, 12 (NOT 8)
external and internal carotid a, sympathetic trunk, Strep equi zoo normal
Term
What are some approaches to the guttural pouch?
Definition
Viborg's triangle, modified whitehouse, hyovertebrotomy
Term
Horse with intermittent snotty nose and swelling on the side of the head?
Definition
GP empyema
Term
Filly with a nonpainflu pouch filled with air on the side of her nose?
Definition
GP tympany
Term
A neurologic horse with a really bad nose bleed?
Definition
GP mycosis (aspergillus)
Term
Horse with profuse nose bleeds following trauma?
Definition
longus capitus rupture
Term
DDx of epistaxis from GP area?
Definition
GP mycosis, longus capitus rupture
Term
DDx for nasal d/c (guttural pouch dZ)?
Definition
GP empyema, strangles
Term
DDx for increased respiratory signs (guttural pouch dz)?
Definition
GP empyema, strangles
Term
DDX for parotid swelling?
Definition
GP emypema, GP tympany
Term
DDX for horners?
Definition
GP mycosis
Term
Tx for GP empyema?
Definition
surgical approach via Viborg's triangle
lavage, lance abscess
failure to tx-->chondroid material accumulation that will become hard inspissated pus
Term
Tx for GP tympany?
Definition
NSAIDS, SX
Term
Tx for GP mycosis?
Definition
systemic and topical antifungal, occlude aa (ligate internal carotid a)
Term
Tx for longuscapitis mm rupture?
Definition
stall rest, Ab
Term
What is Haemotobia irritans and what does it cause?
Definition
Horn fly that feeds on blood causing VENTRAL MIDLINE DERMATITIS
It is the IH for STEPAHNOFILARIA STILESI (a filarial parasite taht causes plaque lesions on ventrum of cattle)
Term
What is the tx for Haemotobia irritans?
Definition
sprays, dust bags, or insecticide feed additives
Term
What is a heart-bar shoe used for?
Definition
CHRONIC LAMINITIS: supports P3 by pressing up on frog
Term
Seen small FAT ponies with increased TG, liver enzymes, and decreased albumin and glucose?
Definition
hepatic lipidosis
Term
What is the tx for hepatic lipidosis in horses?
Definition
dextrose, insulin, heparin
Term
What causes hyperkalemic periodic paralysis?
Definition
autosomal dominant "impressive" QH
point mutation in Na channels causing leakage
Term
What are signs of HyPP?
Definition
increased K, BRADYCARDIA, muscle fasciculations, collapse, myotonia, dog sitting, death, standstill
Term
What are triggers for HyPP?
Definition
high K diets (alflafa, molasses, electrolyte supp)
fasting, anesthesia, ehavy sedation, trailer rides, stress
Term
Dx and tx for HyPP?
Definition
K levels in blood or genetic hair test
NA Bicarb (drives K back inot cells by pulling H out)
Ca BOROGLUCONATE
Dextrose (insulin drives K in)
Term
How can HyPP episodes be prevented?
Definition
low K diet (Timothy or Bermuda)
ACETAZOLAMIDE (increases renal excretion of K)
Term
What is the etiology of hypothyroidism in horses?
Definition
foals with iodine deficiency or excess
Term
What are signs of hypothyroidism in horses?
Definition
physeal dysgenesis, incoordination, limb deformitities, tendon ruptures, still births, weakness, death
Term
DDx for pre-hepatic icterus?
Definition
anorexia, hemolysis
Term
DDx for hepatic icterus?
Definition
Theiler's disease, Tyzzer's disease (Clostridium piliforms)
Term
What is the etiology for inflammatory airway disease in horses?
Definition
multiple...allergic dz, recurrent pulmonary stress, persistant viral infectinon, Strep pneumoniae---LRT dz
Term
What are signs of inflammatory airway disease?
Definition
chronic cough, snot-nosed horse
Term
Dx of inflammatory airway dz?
Definition
history and clinical signs
BAL (mixed: environmental or previous infectious dz, MC: local hypersen/early COPD, eosinophilic: type I hypersen, parasitic)
Term
Etiology and transmission for equine influenza?
Definition
ORTHOMYXOVIRUS, highly contagious, young horses, AEROSOL
Term
What are signs of influenza?
Definition
explsoive outbreaks, no abortions, coughing
Term
How is influenza dx?
Definition
viral isolation of nasopharyngeal swabs
Term
What are ddx for flu?
Definition
EHV1, EVA
Term
What are causes of laminitis?
Definition
GRAIN O/L, retained placenta, endotoxemia, colic, black walnut shavings, overexercise on hard surfaces, steriods, obesity, cushings
Term
Signs of laminitis?
Definition
CROUCHED, RELUCTANT TO STAND/WALK, feet thrust forward. Acute: warm feet with boudning pulses, exercise resistant. Chronic: laminar rings, osteoporosis, rotation of pedal bone, "slipper foot", "scissor claw"
Term
How is laminitis dx?
Definition
rads: lack of parallelism btw P3 and hoof wall; assess blood supply
Term
How do you treat acute laminitis?
Definition
EMERGENCY 12 HRS, MINERAL OIL (3-4 L IN NG TUBE), NSAIDS, support sole (sand), ALPHA ADRENERGIC BLOCKERS--PROMORTE DIGITAL CIRCULATION, eparin to prevent coag/DIC, giital PASTERN neree block, inmprove keritinaization
Term
Tx of chronic laminitis?
Definition
NO steriods (causes vasoconstriction)
therapeutic shoeing, build up toe, resect damage wall, tenotomy/desmotomy
Term
What is the most common URT obstruction in horses and what is teh etiology?
Definition
"roarers", laryngeal hemiplegia
idiopathic: abductor mm dysfucntion, damage LRL n.
Term
What are signs of laryngeal hemiplegia?
Definition
INSPIRATORY NOISE, exercise intolerance, >90% LEFT sided
Term
How is laryngeal hemiplegia diagnosed?
Definition
endoscope larynx
grade I: synchronous, full abdu; grade II: asynchronous, full abd; grade III: asynch, incomplete abd; grade IV: complete paralysis
Term
What are the tx for laryngeal hemiplegia?
Definition
sx: prosthetic laryngoplasty, ventriculecotmy, arytenoidectomy
Term
What does Lawsonia intracellularis cause in horses?
Definition
4-6m foals; PROLIFERATIVE ENTERITIS with mucosal hyperplasia, attacks CRYPTS
Term
What is the tx for Lawsonia intracelluaris?
Definition
Erythromycin and Rifampin
Term
What does Leptospirosis do to horse?
Definition
uveitis, abortion
Term
What is lethal white syndrome?
Definition
ILEOCOLIC AGANGLIOSIS in overo pains taht give birth to all white foals with blue eyes
Term
What are clinical signs of lethal white syndrome?
Definition
intestinal hypomotility, megacolin, constipation, colic, DEATH
Term
What are clinical signs of lice in horses?
Definition
wight loss, irritability, rough hair coat, unthriftiness, anemia if enough lice
Term
How is lice treated in horses?
Definition
topical OP or synthetic pyrethroids, Ivermectin
Term
What are clinical signs of liver disease?
Definition
weight loss, pruritis, inspiratory stridor, CNS signs
Term
What are bloodwork abnormalities seen with liver failure in horses?
Definition
increased GGT (cholestasis), SDH (hepatic), AST (mm), ALP (bone), bile acids, BIL
Term
What is the general treatment for horses with liver disease?
Definition
IV fluids with Dextrose, decreased protein diet, kill ammonia producing bacteria in gut, branch-chain aa (decreases hepatic encephalopathy)
Term
What are some causes of liver disease in horses?
Definition
Theiler's, Tyzzer's, chronic megalocytic hepatopathy, hepatic lipidosis
Term
What enzymes are used to measure M/S disorders?
Definition
CK has a short 1/2 life
AST has a longer 1/2 life
Term
How can you diagnose M/S disorders such as HyPP, PSSM, RER?
Definition
exercise test: meausre CK and AST before and after
if >2-4x increase, also needs to be normal within 24 hrs
Term
What is the "false nostril" in the horse?
Definition
nsala diverticulum, a blind cutaeous POUCH in dorsal nasal passage, can trap an ET tube
Term
What does navicular disease cause?
Definition
forelimb lameness, heel pain
Term
How is navicular disease diagnosed?
Definition
flexion test of distal limb makes lameness worse, abndomal gait, LOLIPOPS on rads
Term
How do you treat navicular disease?
Definition
egg bar shoe (heel elevation), digital neurectomy (if no response to medical tx after 6-12 wks)
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