EQ Breed Dispositions

Question 1

RER

Answer 1

Thoroughbreds

Give Dantrolene before exercise

Question 2

PSSM

Answer 2

QH

Dominant

Type 1: drafts (Belgians, percherons), halter horses (QHs, appaloosas, paints) GYS1 mutation

Type 2: performance horses (QH, warmbloods)

CK exercise trial

Question 3

HYPP

Answer 3

QH and halter horses

Dominant

ATPase channel doesn’t work —> hyperkalemia (give dextrose)

Question 4

MH

Answer 4

QH and pigs and humans

Dominant

Ryanodine receptor mutation

Triggered by anesthesia, succinylcholine, and stress

Give Dantrolene

Question 5

HERDA (Hereditary Equine Regional Dermal Asthenja Disorder)

Answer 5

QH

Recessive

Defective collagen (skin sloughs)

Question 6

GBED

Answer 6

QH, paints, appaloosas

Recessive

FATAL

Muscle weakness, repro issues

Question 7

IMM

Answer 7

QH, reining, working cow horses, halter horses

Strangles causes it

Mutation in myosin heavy chain 1 (MYH1)

Immune system targets muscles on topline and gluteals

Calciphylaxis (fatal)

Question 8

Myofibrillar myopathy

Answer 8

Arabians and warmbloods

Muscle stiffness (mild signs of RER but no elevated muscle enzymes)

Linked with previous PSSM 2 diagnosis

Stain for Desmin on muscle biopsy

Question 9

ERU

Answer 9

Appaloosas

Autoimmune so give steroids (or cyclosporine implant)

Question 10

Night blindness

Answer 10

Leopard appaloosas and Tennessee walkers

Incomplete dominance

Can test genetically

Question 11

Multiple congenital ocular anomalies (MCOA)

Answer 11

Rocky Mountain horse (silver coats)

Cysts, big cornea, weird iris and retina

Question 12

Lethal white ovaro

Answer 12

2 frame ovaros

Incomplete dominance

Question 13

Blue eyes and deafness

Answer 13

Splashed paints (white face)

Endothelium B receptor mutation

Question 14

Warmblood fragile foal syndrome

Answer 14

Warmbloods

Connective tissue defect that’s fatal (hyperextensible)

Recessive

Question 15

Red foot dz and junctional epidermolysis bullosa

Answer 15

Belgians and American Saddlebreds

Blistering of skin and mouth, hooves slough

Recessive

Question 16

Lavender goal syndrome

Answer 16

Arabians

CNS signs and hyper extension- fatal

Recessive

Question 17

Juvenile idiopathic epilepsy

Answer 17

Egyptian Arabian goals

Seizures that stop after 1yo

Question 18

Cerebellar abiotrophy

Answer 18

Arabians

Neuro signs that show up by 6mo (normal at birth)

Don’t ride (pasture pet)

Recessive

Question 19

Severe Combined Immunodeficiency (SCID)

Answer 19

Arabians

No immune system- fatal

Recessive

Question 20

Strangulating lipomas

Answer 20

Arabians and old

Question 21

fecaliths

Answer 21

Minis

Question 22

EMS

Answer 22

Ponies, Arabians, donkeys, minis, Morgan’s, Paso Finos, Fjords, gaited horses (TN walking horse, Missouri fox trotters, saddlebreds)

Fat middle aged

Laminitis

Question 23

PPID

Answer 23

No breed association, just old

Question 24

Navicular dz

Answer 24

QH, TB, WB

4-15yo

Question 25

Degenerative suspensory ligament disease

Answer 25

Peruvian Paso (all limbs), old, broodmares, exercise, prior SL injury Collagen degeneration —> fetlock drop multiple limbs (usually hind) Poor prognosis

Question 26

Recurrent laryngeal neuropathy

Answer 26

Racehorses, drafts, warmbloods

Question 27

Laminitis

Answer 27

Ponies and donkeys In these because insulin resistance, increased insulin secretory response, fat, hypertriglyceridemia Pasture and steroids can cause it

Question 28

Pattern dermatitis

Answer 28

Feathers (shires, Clydesdales, Belgians) Mild (scratches) —> exudative —> chronic proliferation Usually bilateral, itchy

Question 29

Team roping

Answer 29

Headers > heelers Headers: RF

Question 30

Cutting and reining

Answer 30

Poor Performance > lameness Hindlimb > forelimb Stifle and suspensory ligament desmitis

Question 31

Barrel horse

Answer 31

Lameness > poor performance Limbs affected in the same order we number dental Bilateral forelimb lameness

Question 32

Dressage

Answer 32

Hind limbs > forelimbs Suspensory issues, forelimb coffin joint OA, forelimb check ligament desmitis

Question 33

Jumpers

Answer 33

Thoracolumbar pain Hunters are fast and high Jumpers are slow and low Cross country immovable NOTE: 3 day events is the three, but replace hunting with dressage

Question 34

Racehorses

Answer 34

Fetlock pain, shin splints QH are sprinters, TB are distance

Question 35

Standardbred harness racing

Answer 35

Rhabdo, lots of issues Trotters on diagonal, Pacers are ipsilateral Race longer than racehorses

Question 36

Gaited horses

Answer 36

Hind limbs > forelimbs Soring Proximal suspensory desmitis