Repro, GI & Skin Diseases in Swine Flashcards
(49 cards)
What virus family causes Porcine parvorius?
Parvoviridae (DNA, naked)
replication in dividing cells, intranuclear inclusion bodies
Does Porcine parvorius survive in the environment?
Yes, it is a parvovirus (naked!) and very stable in the environment for months
What does SMEDI mean?
Still-birth Mummified Embryonic Death and Infertility
Seen with Porcine parvovirus
Who is most effected by porcine parvovirus?
Naive pregnant pigs
Adult pigs are infected but not ill
What is the most important impact of porcine parvovirus?
Reproductive failure (SMEDI -- Still-Birth Mummified Embryonic Death) You do NOT see abortion early on, you see embryonic death or still born/mummified piglets
What happens if a sow is infected with parvovirus before 30 days of gestation?
Fetal death and resorption
What happens if a sow is infected between 30 and 70 days of gestation with parvovirus?
Still-born or mummified piglets
What happens if a sow is infected with parvovirus 70 days into gestation?
Piglets have lesions, but are less severely affected as they can amount an immune response
What is a sign that a sow was infected with parvovirus early on in her pregnancy?
She will go into heat again 3–8 weeks after breeding
You arrive at a farm and the farmer tells you that he bred his gilts about a month ago, and now several of them are in heat. What do you tell him?
They were likely infected with porcine parvovirus
What does ‘endocrinologically pregnant’ refer to?
Sows/gilts infected with parvovirus that do not return to estrus until after the expected time of farrowing
How does porcine parvovirus effect boars?
Low ferility
What blood work abnormality is seen with porcine parvovirus?
Leukopenia
What is unique about porcine parvovirus when compared to other parvoviruses?
Swine parvovirus causes persistent infection with chronic shedding
What diagnostics are used on fetal tissues in suspected porcine parvovirus cases?
IF of fetal tissues
Hemagglutination of guinea pig RBC
Why would you not use serology to diagnose porcine parvovirus?
Many pigs will have antibodies to the virus
It would only be useful in a clean herd
Why might diagnosis of porcine parvovirus be difficult?
If all infections occur in early pregnancy, resorption will occur and there is no specimen to send out
Are there vaccines for porcine parvovirus?
Yes (attenuated and inactivated) there is a small window of opportunity to immunize gilts that are bred before 7 months of age
Good immunological memory, infection of vaccinated pigs rarely result in fetal disease
What is the issue with gilts and parvovirus?
Maternal antibodies last about 6 months, and they are usually bred at 7 months. If they are bred too early, then their maternal antibodies will decline during pregnancy and infection rate is high
What is the role of boars in porcine parvovirus?
They shed it in their semen
Are there immunotolerant pigs with porcine parvovirus?
Possibility, not proven
What virus family causes Transmissible gastroenteritis (TGE)?
Coronaviridae (RNA, enveloped)
What are the four diseases caused by Coronavirus in swine?
1) Transmissible gastroenteritis (TGE)
2) Vomiting and wasting disease
3) Porcine epidemic diarrhea
4) Respiratory disease
In naive populations, who is most severely effected by Transmissible gastroenteritis?
Neonatal porcine (100% mortality!
