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Pig Journal Volume: 62
Publication date: June 2009

Case Studies

ACTINOBACILLUS PLEUROPNEUMONIAE: COMPARISONS OF SWEDISH ISOLATES OF SEROTYPE 2 AND 5 OVER TIME
P. WALLGREN and A. ASPÁN

Abstract
Respiratory disorders associated with Actinobacillus pleuropneumoniae (App) in Sweden have generally been associated with serotype 2 (Wallgren et al., 2003a). However, serotype 5 has also been isolated in a few herds between 1999 and 2007. Pigs affected by App serotype 5 have escaped detection in antibody-detecting ELISA systems based on phenol water extracted antigens of the type strains, but were detected when the ELISA systems were designed from the field isolates (Wallgren et al., 2003a).
During recent years health disturbances associated with App appear to have increased. The present study was carried out to compare strains of App recently isolated with older strains and with type strains.

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