old exam questions: exam 2 Flashcards
T/F baby pigs born rear legs first will cause dystocia in sows
false
T/F the majority of US swine are bred used frozen extended semen
false
T/F swine flu virus has a high mortality rate in mature sows
false
T/F gits should be bred on their first cycle
false
T/F whipworms migrate in the pigs bloodstream
false
T/F for the most accurate heat detection, producers should expose the sow to a female in estrus
false
T/F sick pigs isolate themselves from pen mates
true
T/F sows increase their body conditon during lactation
false
T/F mycotoxins are a type of bacteria
false
T/F for best reproductive success gilts should be bred at 230 pounds
false
T/F PG600 is effective in synchronizing gilts that have gone through puberty
false
for those who havent gone through puberty
how is PG600 administered
IM
T/F the timing of insemination is important in order for the sperm to arrive after ovulation occurs in the sow
false
T/F pigs with ASF can be successfully treated with antibiotics and electrolytes
false
T/F in boars the release of GnRH is stimulated when he is underweight
false
a 250 pound market gilt has whipworms, compared to a non-infected gilt the infected gilt will have ________ ADG
lower
which pig is most likely to die before weaning
born first
born last
born last
during natural service the boar ejaculated into the sows___________
cervix
____________ mastitis is the most common on swine farms
coliform
which berkshire pig is most likely to die before weaning
born with 2 littermates
born with 18 littermates
no difference
no difference
farrowing induction uses what two hormones
PGF2-alpha (lutylase)
oxytocin
mammary development and vulva swelling in prepuberal gilts are symptoms of _________
zearalenone
the ideal body condition score of a sow at farrowing is
3-4
which prepuberal gilt will come into first estrus earliest
exposed to 12 hours of light
exposed to 15 hours of light
exposed to 18 hours of light
no difference (range is 10-18)
when the retractor penis muscle is contracted the boars penis is _______ his body
extended out
retained in
doesn’t interact with penis
retained in
cyanosis is a symptom of PRRS. what body part experiences cyanosis
ears
in a litter, a pig that nursed from a sows __________ teats is heavier at weaning than a pig that nursed from a sows ____________ teats,if all unstated factors are equal
anterior
posterior
nodular worm larvae burrow in the ____________ of pigs
large intestine
which boar would produce the most sperm
testicle length 7.2 inches
testicle length 9.8 inches
no difference
no difference
determined by weight
the estrus synchronization method Matrix mimics _________ in a sow
progesterone
how long is MATRIX administered
14 days
to complete the lifecycle for toxoplasmosis a _______ is needed
cat
the seminal vesicles add ________ to the boars ejaculate to aid in moving the sperm through the sows reproductive tract
prosaglandins
lice are the most common in ____________ months
winter
the CL on a sows ovary produces ___________
progesterone
which swine disease is zoonotic
AR
ASF
Erysipelas
Pseudorabis
transmissible gastroenteritis
erysipelas
which housing type has the most concern regarding pseudorabies transmission
pasture
confinement
deep-bedded
pasture (feral pig contact)
transmissible gastroenteritis affects the pigs ________
small intestine
a sow with PRRS can transmit the virus to others via her:
saliva
milk
nasal secretions
urine
all are possible
none are possible
all are possible
which pig is most at risk of dying from PEDV
5lb nursing pig
25 pound nursey pig
250 pound finishing 450 AI boar
5lb nursing pig
the tunica dartos is the muscle associated with the boars _________
epididymis
scrotum
sheath
spermatic cord
scrotum
in confinement swine barns___________ are the most common internal parasite
large roundworms
whipworms
nodular worms
large roundworms
the ________ layer of the sows uterus responds to the hormone oxytocin
endometrium
mesometrium
myometrium
myometrium
which boar would produce the most sperm
testicles weigh 3.65 lbs
testicles weigh 2.89 lbs
no difference
3.65 lbs
most AI boars are collected using a _________
dummy sow
the most mature sperm is located in the boars __________
epididymis head
epididymis body
epididymis tail
epididymis tail
which prepuberal gilt will come into first estrus the earliest
exposed to a boar for 15 min/d
exposed to a boar 24 hr/d
no difference
15min/day (10-30min range)
which boar would produce the most sperm
85 degree barn
65 degree barn
no difference
65 degree barn
what is NOT a sign of estrus in a mature sow
being ridden by other females
clear mucus discharge from vulva
interior of the vulva red in color
seeking out of the boar
winking of vulva
winking of the vulva
the boars prepuce stores ________
urine
which pig is most likely to diet before weaning
boar
gilt
no difference
boar
in a sows cervix when levels of the hormone ______ are high and the levels of the hormone __________ are low the mucus produced by the cervix is thick forming a cervical plug
progesterone
estrogen
petunia the pregnant sow is infected with swine flu. Petunia has aborted her pregnancy on day 60 of gestation. What caused her to abort
acute disease
fever
during insemination the hormone __________ is released by the sow to help propel the sperm through her repro tract
oxytocin
fertilization of a sows ovum occurs where?
ampulla of the oviduct
sow lactations diets are __________ in energy. Most sow lactation diets contain a laxative source such as ___________ or ___________ to help sows maintain normal elimination
high
beet pulp
epsom salt
lactation in sows prevents the release of _________ from the sows hypothalamus
GnRH
on a 95 degree day the cremaster muscle in the boars ___________is ________ causing the testicles to be _____________ the boars body
spermatic cord
relaxed
further from
manny the market hos is pale, grinding his teeth and has dark feces. What disease/condition does manny have?
what caused this condition/disease?
gastric ulcers
too fine of feed
the virus causing porcine epidemic diarrhea affects the villi enterocytes in the pigs _______. The new epithelia that grow are __________ in shape and are unable to absorb ________
intestine
cubodial/flat
nutrient
the atrophic rhinitis bacteria in found in most swine herds. ___________ and __________ will cause an increase in occurrence/prevelance of AR cases in the herd
low humidity
poor ventilation
when extending boar semen each dose should contain ___________ sperm/dose. the extended sperm should be stored at __________ degrees and agitated __________ a day
2-6 billion
57-64
2x
the first portion of a boars ejaculate, the pre-sperm is __________ in color and is not collected as it contains _________. The sperm-rich portion of the boars ejaculate is ______________ in color and is collected into a pre-warmed container.
An average boar will ejaculate _______mL and the ejaculate contains _______ sperm
clear
lots of bacteria
milky white/grey
200-400
60-130 billion
african swine fever can be transmitted to pigs by ____________ and __________
ticks
eating contaminated meat
exudative epidermitis infections usually occur when in a pigs life
less than 8 weeks
when performing AI on a gilt the catheter needs to be angled upwards when inserted into the vagina. why?
avoid the bladder
a pig with toxoplasmosis may develop cysts in his ________ and _________
skeletal muscle
heart
the gel fraction of a boars ejaculate is secreted by the _____________
bulbourethral gland (cowpers)
swine with external parasites experience _______mortality rates. External parasites ______ growth rates and ________ carcass value
low
decrease
decrease
ferm the finishing pig has a rectal prolapse, her prolapse could be a result of:
1.
2.
- coughing
- cold stress
once fertilization occurs the developing embryos must signal their presence to the sow, they do this by secreting the hormone ________. This prevents the sow from releasing the hormone ________ which would trigger the resumption her estrous cycle
estrogen
prostaglandin
large roundworm larvae penetrate the walls of the ____________ to enter the bloodstream where they first travel to the __________. The scar tissue left behind at this first stop is called ___________. After 3-4 days at their first stop the larvae enter the bloodstream again and travel to the pigs ______ where they spend 4-5 days. The larvae are eventually ______ and __________ by the pig before completing their final journey to become adults
intestine
liver
milk spots
lungs
coughed up
re-swallowed
