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Theriogenology > Stallion > Flashcards

Flashcards in Stallion Deck (29):
1

Describe the method of chemical ejaculation in the stallion

- loading dose of Imipramine IV (lowers ejaculatory threshold)
- large dose of Xyalzine an hour later
- ejaculation during deep phase of sedation

2

What is the minimum number of motile, morphological normal sperm for the stallion to be considered satisfactory?

1 billion

3

What is the minimum number of motile sperm for fresh semen AI?

500 million

4

What is the minimum number of motile sperm for cooled semen AI?

1 billion

5

What is the minimum number of motile sperm for frozen semen AI?

load 800 million to 1 million
- 240 million at thawing

6

Where do urethral rents most commonly occur?

convex surface of urethra at ischial arch

7

What are the semen fractions and their respective sources?

presperm - bulbourethral glands, urethra

sperm rich - epididymis, ampulla

sperm poor - prostate, vesicular glands

gel - vesicular glands

8

What is hydrocele/vaginocele?

serous fluid between the visceral and parietal layers of the vaginal tunic

9

What is variocele?

dilation of the vessels of the pampiniform plexus

10

How is priapism treated?

- anticholinergic or B2-adrenergic drugs
- Phenylephrine injected into CCP
- surgical irrigation of CCP

11

What is the cause of coital exanthema?

Equine Herpesvirus - 3

12

What is the most common neoplasia of young horses?

teratoma

13

What is testicular degeneration?

acquired atrophy of seminiferous tubules

14

What is the most common penile neoplasia of stallions?

squamous cell carcinoma

15

What is ampullar spermiostasis?

plugged ampullae
- excessive accumulation of spermatozoa

16

Bloody, brown, or beige semen is indicative of what?

vesicular adenitis

17

What causes contagious equine metritis?

Taylorella equigenitalis

18

What causes Dourine?

Trypanosoma equiperdum

19

What is Dourine?

edema of external genitalia

20

What value of seminal plasma alkaline phosphatase indicates a blockage?

< 100 U/L

21

What are shuttle stallions?

stallions that travel to southern hemisphere to breed

22

What are the treatment options for urethral rents?

- sexual abstinence
- perineal urethrostomy
- perineal incision of CSP without entering lumen

23

What is the thoracolumbar reflex arc?

contracture of smooth muscle of ductus deferens, accessory glands, and bladder trigone
- emission

24

How is urospermia treated?

- completely empty bladder before ejaculation
- Furosemide to dile urine contamination
- bladder lavage
- dilate raw semen immediately
- Alpha-adrenergics

25

What is retrograde ejaculation?

semen in the bladder

26

When does normal testicular descent occur?

last 30 days in utero or first 10 days after birth

27

What is formed from the gubernaculum?

- proper ligament of testes
- caudal ligament of epididymis
- scrotal ligament

28

Which breeds are predisposed to cryptorchidism?

QH
Percheron
ASH
Ponies

29

How is cryptorchidism diagnosed?

- rectal exam, ultrasound
- resting testosterone concentration
- GnRH/hCG stimulation
- basal estrone sulfate
- AMH