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High Porcine Parvovirus Antibodies in Sow Herds: Prevalence and Associated Factors
Author(s) -
Oravainen J,
Hein M,
Tast A,
Virolainen JV,
Peltoniemi OAT
Publication year - 2005
Publication title -
reproduction in domestic animals
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.546
H-Index - 66
eISSN - 1439-0531
pISSN - 0936-6768
DOI - 10.1111/j.1439-0531.2004.00555.x
Subject(s) - herd , litter , vaccination , veterinary medicine , herd immunity , biology , titer , population , antibody , zoology , gee , virology , generalized estimating equation , medicine , immunology , environmental health , mathematics , agronomy , statistics
Contents Porcine parvovirus (PPV) is widespread among swine. Our objective was 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. In addition, selected 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).