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45 Cards in this Set

  • Front
  • Back
Who is the definitive host for toxoplasmosis and what is the protozoal organism?
Toxoplasmosis- defin host is the cat, Toxoplasma gondii
What is the most common ocular lesion associated with Toxoplasmosis?
multifocal posterior chorioretinitis; another common ocular insult is exudative or granulomatous anterior uveitis
Ehrliciosis of dogs is caused by ___ ?
the rickettsial agent, Ehrlichia canis
An untreated, chronic stage of Ehrliciosis is characterized by ___ ?
bone marrow injury and pancytopenia
vs. acute- fever, lethargy, thrombocytopenia
What are some common ocular signs associated with Ehrliciosis?
hyphema, anterior uveitis, corneal opacities, subretinal hemorrhage, NONgranulomatous chorioretinitis, retinal atrophy, retinal detachment
Blastomycosis is a common fungal infection in dogs. What is the etiologic agent?
Blastomyces dermatitidis
What are common ocular lesions associated with Blastomycosis?
anterior uveitis, exudative retinal detachment, severe granulomatous chorioretinitis, optic neuritis, and secondary glaucoma
In order of decreasing frequency, what ocular lesions are associated with Canine Distemper?
conjuctivitis, chorioretinitis, keratoconjuctivitis sicca, and optic neuritis
What are "medallion lesions" and what are they associated with?
areas if retinitis and perivascular infiltration that are hyperreflextive and atrophic; associated with canine distemper
What is the etiologic agent of FIP?
In what stage of FIP (feline infectious peritonitis) are ocular lesions MOST common?
noneffusive (dry) form
What is the predominant ocular lesion seen with FIP?
severe pyogranulomatous anterior uveitis
What are the most common ocular lesions associated with FIV?
focal retinal detachment, retinal hemorrhage, and anterior uveitis
What ocular lesion is commonly associated in dogs with Diabetes mellitus?
bilateral cataract formation
How do cataract develop in a diabetic patient?
excess glucose is metabolized to SORBITOL, a hydrophilic alcohol that cannot diffuse out of lens; water is drawn into the lens, swelling, rupture, cataracts
What ocular lesions are associated with hyperlipidemia?
corneal lipid deposits (lipid keratopathy), lipid-laden (diffusely opaque) aqueous humor or lipid retinalis
Corneal lipid deposits may occur as an inherited disorder in what breed?
Siberian Husky
What ocular lesions are normally seen in cats with Taurine defiency?
bilateral central or panretinal degeneration
Blinking and Menance response asses what cranial nerves
Strabismus assesses which cranial nerves?
What is the term noted for large globe of the eye?
What is the term noted for small globe of the eye?
What is the term noted for convergent strabismus seen in food animals?
Blink response test cranial nerves ____ ?
Cranial nerves V (sensory to the face) and VII (motor to the face and ears)
What term is indicated if a blink response test is preformed and the blink is not complete?
The menace response is preformed when testing the animals vision, and only works as learned response. What cranial nerves does it test?
Cranial nerve II and VII and the cerebral cortex
If you are unsure about the animals vision after a Menance response test what should you do?
Cotton ball test
What is chemosis?
Edema of the bulbar conjuctiva, causing swelling around the cornea
an eyelid mass caused by inflammation of the meibomain gland and inspissated secretory material from the gland. Its painless and seen from the palpebral conjuctiva as a yellow mass
What is a STYE?
a.k.a Hordeleum; bacterial infection of the miebomian gland. TX with hotpack, sys/local abx
abnormally placed eyelashes which arise from the miebomian (tarsal) gland
normally located hairs directed abnormally so that they contact the globe
eyelashes that arise from the miebomian gland and emerge through the palpebral conjuctiva
How do you differentiate superficial from deep vessels of the eye and what do they indicate?
superificial vessels are long, thin, and branch like a tree
indicate superficial disease
deep vessels are short and non branching
indicate deep ocular disease (glacoma, anterior uveitis, scleritis)
What is moon blindness?
Equine recurrent uveitis, periodic opthalmia; inflammation of the iris, ciliary body, and choroid
Tapetum lucidum is not present in what two spp?
man and pigs
What is hypopyon?
accumulation of purulent material or white blood cells in the anterior chamber of the eye
What is HYPHEMA?
blood in the anterior chamber of the eye
What is posterior synechia?
What is anterior synechia?
posterior synechia- iris adheres to the lens
anterior synechia- iris adheres to the cornea
What is aqueous flare and what does it indicate?
abnormally large amounts of protein in the aqueous humor; indicates anterior uveitis
How is aqueous flare diagnosed?
put the opthalmoscope on slit setting and hold it less than 1 cm away from the eye with lights out. Look at the anterior chamber from the side. Normal dog- beams at the cornea, beams at the lens, DOES NOT beam through the aqueous
During an examination, when is it conraindicated to dilate the pupils?
if the animal has (1) glaucoma, (2) lens subluxation
What is the best way to distinguish nuclear sclerosis from cataracts?
preform a fundic reflection test; when pen-light is placed into the eye, with nuclear sclerosis, a tapetum reflexion will be seen; in cataracts, the reflexion will be blocked
What is an aphakic crescent and how is it diagnosed?
lack of a lens; diagnosed by Fundic Reflection Test (pen-light in eye)
What is the normal Schirmer Tear Test for dogs?
greater than or equal to 15mm/minute