Porcine Parvovirus (PPV)

Question 1

Signs

Answer 1

• non-enveloped virus
• – multiple transmission routes
• outcome determined by the timing of infection
• – varies with the stage of gestation
• most frequently gilt litters
• – lack immunity
• – 15-70 days of gestation

Question 2

Effects

Answer 2

• infertility
• – sow will return to oestrus
• – late return to oestrus (resorption)
• abortion (rare)
• farrow at normal time
• – normal litter
• – small litter
• – low birth weight litter
• – stillbirths, mummifications and deaths

Question 3

Control

Answer 3

• lifelong immunity once exposed
• – can be pockets of naive animals in large herds
• maternal antibody persists for 7 months
• – vaccination important to prevent waning of herd immunity (cyclical infection every 3-4 years)
• – gilts most important (<50% may be immune at the point of mating)
• – vaccinate prior to mating (~3 weeks)
• no effective treatment