Observations on the epidemiology of porcine parvovirus.

  title={Observations on the epidemiology of porcine parvovirus.},
  author={Ralph H. Johnson and C. R. Donaldson-Wood and U Allender},
  journal={Australian veterinary journal},
  volume={52 2},
Evidence presented suggests that porcine parvovirus is highly stable and infective. Introduction of virus to susceptible herds results in 100% infection rate within the following 3 months. Active immunity is associated with high persistent levels of haemagglutination-inhibitating (HI) antibody (greater than 256), piglets suckling immune sows acquiring HI titres between 10,000 and 40,000. Loss of passive immunity, measured by HI, occurs in a majority of pigs between 14 and 26 weeks of age (mean… CONTINUE READING

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