Final Flashcards
What repro problem in mares results in small ovaries and absent ovulation fossa?
Turners syndrome (X, O)
Why should mare endometrial culture be done before cytology?
Can introduce infection with cytology done first
What indicates contamination in a mare cytology and culture?
bacteria without inflammatory cells
What procedure is done on mares to give a prognosis for the mare to carry a foal to term?
endometrial biopsy
What is the best time for identifying cervical defects in mares?
under progesterone influence
What are the two most common bacterial causes of endometritis in mares?
e. coli and strep equi zooepidemicus
What are the two most common fungal causes of endometritis in mares?
candida albicas
aspergillus
What causes equine contagious metritis?
Taylorella equigenitalis
How is endometritis in mares diagnosed?
US and culture
How is endometritis in mares treated?
antibiotics
ecbolics - contraction
uterine flsuhing
corticoids
What are the two most common causes of ovarian enlargement in mares?
granulosa theca cell tumor
anovulatory hemorrhagic follicle
How is granulosa theca cell tumor treated in mares?
surgery - colpotomy
What is the best test for granulosa theca cell tumor in mares?
antimullerian hormone test, also do progesterone (to rule out preg)
What are the two types of endometrial cysts in mares?
Lymphatic
Glandular - less common
What causes infertility with endometrial cysts?
prevent embryo from implanting
What is the signalment for hemorrhagic follicles in mares?
older than 16 yrs
cloprostenol shot
spring and fall
What is the treatment for hemorrhagic follicles?
not much known about pathogenesis, spontaneous, give prostaglandin
What causes pyometra in mares?
defective cervical drainage
What is unique about stallions during off season in regard to their testicles?
decreased # of sertoli cells
What should not be used in washing the stallions penis?
soap or anti-septic
What causes coital exanthema in horses?
EHV type 3
Why can’t a mare be a carrier for EVA?
testosterone dependent - only males can be carriers
How can you tell if a stallion is a persistant carrier for EVA?
positive blood Ab –> then do viral isolation of semen
How is EVA prevented?
vaccine for colts(6-9 months)
What is the most common cause of scrotal enlargement?
fluid accumulation in vaginal cavity (b/w parietal and vaginal tunic) (hydrocele)
What systemic diseases can cause scrotal enlargement?
septic peritonitis
hemoperitoneum
ascites
What pathologies can cause damage to the scrotal wall?
habronema, cutaneous neoplasia, trauma, dermaitis
What is the difference between scrotal hernia and inguinal hernia in stallions?
scrotal hernia is outside vaginal cavity
What is the main cause of inguinal hernias in stallions?
breeding activity
What is the difference between testicular rotation and torsion?
rotation is less than 180 degrees, normal blood supply, no tx
What is the most common testicular neoplasia in stallions?
seminoma
What should be done if a horse has testicular neoplasia?
do rectal - feel for metastases
What can be done to diagnose a cryptorchid in horses if not seen on US?
hormone testing - AMH (anti mullerian) test
What test can confirm if there was an ejaculation from a stallion?
alkaline phosphatase in semen
Where do stallions accumulate sperm to in spermiostasis?
extra-current ducts
Where can sperm be blocked in spermiostasis?
ampulla
What can urospermia in stallions indicate?
can be sporadic or neurologic
By what route should prostaglandin be given to mares?
always IM
What are the benefits/cons of doing a stallion open castration?
can see if hemostasis
higher risk of eventration
How should the emasculator be held when castrating? How long should it stay on?
nut to nut!
1 minute for every year of age, up to 5
What is the primary sign of internal hemorrhage in a horse castration?
tachycardia
What 3 horse breeds are prone to eventration because of large inguinal rings?
standardbreds, saddlebreds, draft breeds
What is the most common type of a cryptorchid horse?
unilateral and inguinal
Which side cryptorchid in horse is most likely to be abdominal?
left
What is the etiology of cryptorchid?
failure of gubernaculum
What test is used for geldings with retained cryptorchid?
AMH (should be high if have testicle)
What is the term for failure of detumescense in horses? (constant erection)
priapsim
What is the term for penis does not retract in horses?
paraphimosis
What drugs are contraindicated in paraphimosis in horses?
tranqulizers, phenothiazines may worsen or cause paralysis
What surgical technique is used to creat a scar to retract penis in paraphimosis?
boltz technique
What is the most common neoplasia of the stallion penis?
squamous cell carcinoma
What surgical technique is performed if a caslicks alone doesnt restore dorsal seal on mares? What is the last resort?
perineal body reconstruction, epesioplasty
last resort: perineal body transection
What is a 2nd degree laceration in a mare? How treated?
involves mucosa, perineal body, vestibule, and anal sphincter
tx: perineal body reconstructioon + caslicks
What is a 3rd degree laceration in a mare? How treated?
rectovaginal septum lacerated
tx: reconstruct rectovaginal septum
How long should you wait before repairing a perineal laceration in mare?
30 days
When should surgical repair be done on a mare with a cervical laceration?
during estrus or diestrus
How long do have from when the mares water breaks to deliver a live foal?
90 minutes
What is the most common complication in mare ceserean section?
hemorrhage from uterine incision
How should the uterine in a mare be stitched up after c section?
whipstitch uterine edges
simple continuous reduces blood loss
then use utrecht to close
What are indications for using midline celiotomy in uterine torsions for mares?
concurrent intestinal lesion
What technique should be done on a mare uterine torsion if less than 320d pregnant?
flank laporatomy
What are the two main complications from ovary removal in mares?
hemorrhage and hypotension (reflexive)
What are the ways that rectovaginal fistulas can be repaired in a mare?
make it a 3rd degree RV tear
vaginal mucosal flap
close rectal and vestibular flaps closed seperately
What is a good dose of motile sperm for breeding a mare for cold shipped semen? frozen semen?
cold 500 million
frozen - 300 million
What size should the mares follicle be before doing AI?
30-40 mm + uterine edema
How long until you do AI after you give deslorelin to mare?
36 hr
What does the embryo produce that allows it to enter uterus of mare?
PGE2 (relaxes uterus, maintains preg)
When is the embyro fixation in the mare?
day 16
What do the endometrial cups in the mare produce? When?
eCG, day 35 (luteinizes follicles to help with progesterone)
When does the primary CL produce progesterone in mares? secondary CLs?
primary - ovulation to 100d
secondary - 35 to 100d
placenta takes over after that
What maintains pregnancy in the mare from 150d to term?
5alpha dihydroprogesterone
What do the fetal gonads produce during pregnancy?
Androgens -> DHEA ->estrogen for uterus
pregnenolone –>progesterone
When should the first pregnancy diagnosis be performed on a mare?
14-15 d post ovulation (before fixation), check for twinning
What day for preg check for mare will you see a heart beat?
25 days
When on ultrasound is the embryo in the middle of the yolk sac?
30 days
What is the problem with aborting mares after 35 days?
has endometrial cups - will not return to heat in the season
What kind of placenta do horses have?
microcotyledonary, diffuse, epitheliochorial
What are the definitions for embryonic loss and fetal loss in mares?
embryonic - less than 40d
fetal - greater than 40d
What is a sign of ruptured pre pubic tendon in pregnant mares?
blood in mammary gland, poor prognosis
What fungus causes abortion, prolonged gestation, retained placentas in mares?
fescue toxicosis
What can be done about fescue toxicosis in mares?
take off pasture 30d prior to foaling, give dopamine antagonist to reverse some effects
When should pregnant mares be vaccinated for EHV1?
5, 7, and 9 months
What 2 viruses cause abortion in mares?
EHV 1 and EVA
What are the 4 types of placentitis in mares?
ascending - most common
nocardioform - common in kentucky, lesions around body and base of horns
diffuse - leptospira, inflammed cord, abortion storm
multifocal - candida albicans, rare
What is the main bacteria that causes ascending placentitis and abortion?
strep equi ssp zooepidemicus
What are the clinical signs of ascending placentitis in mares?
premature mammary gland development, vulvular discharge
produces prostaglandings - abortion