Swine Diagnosis of Infertility Flashcards
What is the most common cause of
non-infectious infertility in pigs?
Hydrosalpinx
This is the 2nd most common cause of
non-infectious infertility in pigs.
They do NOT respond to hormonal therapy,
and this disease can be caused by estrus induction agents
Cystic Ovarian Disease
In regards to infectious causes of infertility:
Direct disruption of spermatogenesis via localization
within the parenchyma is caused by these 3 organisms
to cause infertiliity in the boar
Brucella, Chlamydia, Rubulavirus
In regards to infectious causes of infertility in the boar:
These agents are shed in the semen and causes disease in females
Classical Swine Fever
- Leptospirosis*
- Pseudorabies*
- Parvovirus*
- PRRS*
In regards to infectious causes of infertility in the sow:
Which 3 bacterial agents can cause sow infertility?
- Leptospirosis*
- Brucella*
- Erysipelas*
In regards to infectious causes of infertility in the sow:
Which 4 viruses can cause sow infertility?
PRRS virus,
parvovirus,
pseudorabies virus,
classic swine fever
What is the most common cause of porcine
pregnancy loss?
LEPTOSPIROSIS
L. pomona is most common serovar
Mummified fetuses most common abnormality seen
What fetal abnormalities are most often seen
in cases of pregnancy loss due to Leptospirosis?
Mummified and Macerated fetuses
Immunity to Leptospirosis lasts
for ______ following abortion
1 year
(Vax every 6 months!)
How is Leptospirosis controlled?
TETRACYCLINES in the feed will
help to reduce shedding but does not cure
or eliminate carriers
Orchitis in boars is suggestive of this
cause of infertility
Brucella suis
Boars can remain carriers for Brucella suis
for this long
over 4 years!
Granulomatous lesions in uterus, ovaries, testes, accessory sex glands, liver, kidney are
caused by this reportable agent of infertility
and can be spread by rodents and rabbits
Brucella suis
What is the method of choice for control of
Brucella suis?
Test and slaughter
MANY PIGS CARRY THIS ORGANISM ON THEIR TONSILS WITHOUT CLINICAL SIGNS
Erysipelothrix rhusiopathiae
What is the most likely cause of these lesions
seen in pigs; it also causes arthritis in piglets,
and abortion secondary to fever and septicemia
Erysipelothrix rhusiopathiae
What is the causative agent of PRRS?
Arterivirus
This disease has caused the most problems in swine industry.
See up to 10% mortality in sows and 100% in piglets.
The agent can be transmitted in the semen, and is the reason
we shower in and shower out of pig production.
PRRS (Arterivirus)
PRRS causes sows with premature farrowing,
stillbirths/mummies, weak neonates, and abortion.
When do abortions occur?
Late gestation
How is PRRS diagnosed?
herd serology (PCR)!
This causative agent of infertility in sows
is characterized by
SMEDI = Stillbirths, mummies, embryonic death and infertility
Porcine parvovirus
This causative agent of infertility in pigs causes:
Embryonic and fetal death with no maternal signs.
Females may nest and get mammary development,
but may fail to farrow.
Dead fetuses with lesions at birth.
Sows infected do not normally show signs until farrowing = small litter size and increase number of mummies
Porcine Parvovirus
How is Porcine parvovirus diagnosed?
Clinical signs and serology (FAT test)
of tissue from aborted fetus
How is porcine parvovirus prevented?
Proper acclimatization of replacement gilts
Lepto, parvo vaccination EVERY 6 MONTHS
