Swine Reproductive Diseases Flashcards
how long is the estrous cycle in a sow?
21 days
when can ultrasound be used to diagnose pregnancy in sows?
day 28 onward
if embryos die before mineralization but after nidation, what do you see?
irregular returns to estrus
poor conception rate, reduced litter size
who does porcine parvovirus impact?
gilt litters
what do you see with porcine parvovirus?
mummification: stair step
stillborns
lower conception rates
reduced litter sizes
what Leptospirosis spp are specific to swine?
L. pamona
L. bratislava
what does Leptospirosis usually cause with pregnancy?
late pregnancy: miscarriages, stillbirths, weak pigs
how can you diagnose porcine reproductive and respiratory virus?
PCR: sow sera, processing fluids, oral fluids
IHC on fetal lungs
how is PRRS spread?
shedding pigs
aerosol spread
shared manure handling equipment
poorly washed trucks
fomites
when do open sows return to service after service?
18-24 days
what do you see if fetuses die after mineralization and before immunocompetence?
whole litter: miscarriage
individuals die: mummification
when does mineralization occur?
35 days
when does immunocompetence occur?
70 days
what do you see if there is fetal insult after immunocompetence?
if piglets die: miscarriage or mummification
litter lives: weak, stillborns, increased farrowing house mortality
does parvovirus make the gilts and sows sick?
no
when can parvovirus affect the fetuses?
any time in gestation
how is porcine parvovirus shed?
in feces
very hardy
when should you vaccinate for porcine parvovirus so that you are vaccinating when maternal antibodies have declined?
at 6 months of age
how can you acclimate gilts for porcine parvovirus?
place gilts with older sows, allow at least 30 days for gilts to build immunity to farm pathogens before breeding
not completely reliable
what looks very similar to porcine parvovirus?
porcine circovirus 2 and 3
does Leptospirosis cause mummies?
no
does Leptspirosis cause disease in sows or gilts?
no
what does Leptospirosis cause in people?
jaundice
fever
myalgia
aseptic meningitis
hematuria
when can Leptospirosis affect fetuses?
rare: 0-14 days
usually: 50-115 days: miscarriages, stillbirths, weak pigs
how can you treat Leptospirosis?
tetracyclines to infected animals
what are the reproductive impacts of porcine reproductive and respiratory syndrome?
irregular returns, regular returns, mummies, stillborns
miscarriages, weak pigs
increased farrowing house mortality
does porcine reproductive and respiratory syndrome make sows and gilts sick?
yes: off feed, coughing
how is porcine reproductive and respiratory syndrome spread?
shedding pigs
aerosol
shared manure handling equipment, trucks
fomites
what does pseudorabies look like?
suckling pigs exhibiting convulsions
sows off feed and coughing
cough and sneeze in growing pigs
abortions
