Journal article
Risk factors for Actinobacillus pleuropneumoniae serotype 2 infection in Danish genetic specific pathogen-free pig herds
Between 1994 and 1998, 297 genetic specific pathogen-free (spf) pig herds participated in a monthly clinical and serological monitoring programme for infection with Actinobacillus pleuropneumoniae serotype 2 (ap-2). The average annual herd-level incidence was 3.4 per cent but there was a significant decreasing trend.
A risk index, summing up the exposure from ap-2-infected neighbouring pigs within a 3 km radius, was derived from a geographical information system. A survival analysis indicates that the risk of ap-2 infection increased in proportion to the risk index, suggesting that local spread of ap-2 from infected neighbours was a significant factor.
However, herd-specific purchase policies were not apparently associated with the risk of ap-2 infection.
Language: | English |
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Year: | 2007 |
Pages: | 258-262 |
ISSN: | 20427670 , 00424900 and 02143909 |
Types: | Journal article |
DOI: | 10.1136/vr.160.8.258 |