title: Factors affecting the herd level of antibodies against Mycobacterium avium subsp. paratuberculosis--a case-control study.
authors.affiliation: National Veterinary Institute, Oslo, Norway.
authors.forename: B
authors.initials: B
authors.lastname: Fredriksen
authors.forename: J
authors.initials: J
authors.lastname: Jarp
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000302:isolation & purification*; D002417:Cattle; D005260:Female; D016927:Mycobacterium avium subsp. paratuberculosis / Q000276:immunology*; D009664:Norway / Q000453:epidemiology; D010283:Paratuberculosis / Q000453:epidemiology / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial