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Theriogenology > Swine Reproduction > Flashcards

Swine Reproduction Flashcards

1
Q

How long is the estrous cycle in the pig?

A

21 days

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2
Q

How long is estrus in the gilt?

In the sow?

A

gilt: 36-48 hours
sow: 48-72 hours

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3
Q

When does ovulation occur in the sow?

A

2/3 of the way through estrus

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4
Q

What are the physical and behavioral signs of estrus in the sow?

A
  • vulva swelling and redness
  • vaginal discharge
  • restlessness and vocalization
  • actively seeking boar
  • pricking of ears
  • lordosis response
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5
Q

Which accessory sex glands are present in the boar?

A
  • prostate
  • bulbourethral
  • seminal vesicles
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6
Q

What are the methods of semen collection in the boar?

A
  • artificial vagina
  • electro-ejaculator
  • gloved hand method
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7
Q

What is the length of gestation for the sow?

A

114 days

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8
Q

What type of placenta does the sow have?

A

epitheliochorial diffuse

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9
Q

What is the most common cause of infertility in the sow?

What is the second most common?

A

1st - hydosalpinx

2nd - cystic ovarian disease

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10
Q

What is the most common cause of porcine pregnancy loss?

A

Leptospirosis

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11
Q

How is leptospirosis prevented/controlled?

A
  • vaccination every 6 months

- tetracyclines in the feed to reduce shedding

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12
Q

How is Brucella suis transmitted?

A
  • carrier boars
  • coitus or ingestion of infected material
  • rabbits and rodents can spread it
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13
Q

What is caused by Brucella suis infection?

A
  • abortions, stillbirths, infertility in sows

- orchitis in boars

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14
Q

What lesions are associated with Brucella suis infection?

A

granulomatous lesions in uterus, ovaries, testes, liver, and kidney

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15
Q

How is Erysipelothrix rhusiopathiae transmitted?

A
  • may pigs carry organism in tonsils

- via contaminated water and feed

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16
Q

What are the clinical signs associated with Erysipelothrix rhusiopathiae infection?

A
  • arthritis in small pigs
  • fever and skin lesions in gilts
  • abortion secondary to fever and septicemia
17
Q

What type of virus is Porcine Respiratory and Reproductive syndrome?

A

arterivirus

18
Q

How is PRRS transmitted?

A
  • in the semen
  • direct contact
  • aerosols
19
Q

What are the two forms of PRRS?

A
  • reproductive failure

- post-weaning respiratory disease

20
Q

How is PRRS diagnosed?

A
  • virus isolation from aborted fetuses

- herd serology

21
Q

How is PRRS prevented/treated?

A
  • symptomatic therapy
  • vaccination
  • isolation
22
Q

What does SMEDI stand for?

A

S - stillbirths
M - mummies
ED - embryonic death
I - infertilty

23
Q

What disease causes SMEDI?

A

porcine parvovirus

24
Q

How is Porcine parvovirus transmitted?

A

oral or venereal

25
Q

What are the clinical signs associated with porcine parvovirus?

A
  • SMEDI

- usually no maternal signs

26
Q

How is porcine parvovirus diagnosed?

A
  • lesions of aborted fetuses
  • increased irregular return to estrus
  • increased mummies
  • serology
27
Q

How is porcine parvovirus treated/controlled?

A
  • supportive care

- vaccination

28
Q

What virus causes Pseudorabies?

A

herpesvirus

29
Q

How is Pseudorabies transmitted?

A
  • via semen
  • nose-to-nose contact
  • fecal-oral
  • aerosol
30
Q

What are the clinical signs associated with Pseudorabies?

A
  • encephalitis, reproductive failure, reduced litter size
  • fever, anorexia, weight loss
  • CNS signs in young pigs
  • respiratory signs in older pigs
  • resorption, mummies, stillbirths, abortions
31
Q

How is Pseudorabies diagnosed?

A
  • gross +/- histological lesions
  • virus isolation
  • serology
32
Q

What are the clinical signs associated with Hog Cholera?

A
  • anorexia
  • cyanosis
  • fever
  • diarrhea, vomiting
  • abortions
33
Q

What organism causes Zearalenone?

A

Fusarium roseum

34
Q

What are the clinical signs associated with Zearalenone?

A
  • implantation failure
  • estrus, mammary development, and vaginal discharge
  • enlarged vulva with delayed maturity
  • vaginal and/or rectal prolapses
  • reduced testicular development and feminization in males

Theriogenology (17 decks)

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