| [the persistence of activity of h1n1 (swine) influenza virus in pig breeding units during non-epidemic phases]. | a study is carried on in a group of 16 commercial breeding-finishing units in brittany (france). the aim of this study is to try to reveal the persistence of activity of the influenza virus within these intensive units after an acute epizootic. in each farm two batches of pigs are selected, individually identified and followed from suckling period to slaughter. serological controls are conducted every month on the same pigs. both influenza and aujeszky's disease antibodies are apprehended. furth ... | 1985 | 3004802 |