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Parvovirus Antibodies in Sow Herds
Porcine parvovirus (PPV) is widespread among swine. This study tried to determine the prevalence of loosely housed sow herds in Finland with at least one animal with high (infection level) PPV antibodies and to gather basic knowledge about vaccination practices. Furthermore, factors associated with high antibody levels found in sows were examined.

Altogether, 247 animals were sampled in 21 randomly chosen loosely housed sow herds.

Samples were analysed with the haemagglutination inhibition (HI) test.

PPV proved to be common; in 17 farms (81%) at least one animal had a high titre (>1 : 512), and 44% of all animals sampled had a high titre. The vaccination programmes had many shortcomings.

In the generalised estimation equations (GEE) population-averaged model developed, the factors found to have a significant (p 0.05) effect on HI titres were herd size, parity of two or greater and storage of the vaccine vial after use.

Non-returning rate, re-breeding interval and litter size did not differ between herds with no high HI titres (n = 4) and those with at least one high HI titre (n = 17).



Source: Oravainen, J, Heinonen, M, Tast, A, Virolainen, JV & Peltoniemi, OAT (2005): High Porcine Parvovirus Antibodies in Sow Herds: Prevalence and Associated Factors. In: Reproduction in Domestic Animals 40 (1), 57-61.




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SWINE PRACTICE

Pasteurella multocida diversity in poultry and pigs in Australiamembers
This recently published study investigates the genotype and diversity of Pasteurella multocida present in pig herds and determines the extent of overlap with isolates from poultry flocks in Australia. Do the isolates vary? A very interesting study not only for Australia.

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