title: [The effect of 3 times per year random vaccination of sows against Aujeszky's disease on maternal immunity in a breeding farm].
abstract: Research was undertaken to study the effect of a 'three times a year vaccination schedule in sows' against Aujeszky's disease (AD) on the maternal immunity of their offspring at a large pig farm. Only gI-negative sows and piglets were induced in the study. The maternal immunity was measured in the 8-week-old offspring of 6 gilts and 13 sows, vaccinated in early pregnancy and in 8-week-old piglets born from 12 gilts and 21 sows vaccinated 3 weeks prior to farrowing. At an age of 8 weeks only 5 percent of the piglets, born from sows vaccinated during early pregnancy showed antibody titres against AD of > 1:40 in their serum. In piglets born from sows vaccinated 3 weeks prior to farrowing more than 50 (54.4) percent of the piglets showed antibody titres > 1:40 in their serum. It was concluded that using a 'three times a year vaccination schedule' in a gI negative herd may lead to groups of seronegative piglets on breeding and multiplier farms. The implications are discussed.
authors.affiliation: Vakgroep Inwendige Ziekten en Voeding der Grote Huisdieren.
authors.forename: L
authors.initials: L
authors.lastname: Vellenga
authors.forename: H M
authors.initials: HM
authors.lastname: van Beers-Schreurs
authors.forename: P
authors.initials: P
authors.lastname: Ooms
authors.forename: H
authors.initials: H
authors.lastname: Schorn
mesh_terms: D000818:Animals; D005260:Female; D011558:Herpesvirus 1, Suid / Q000276:immunology; D007115:Immunization Schedule; D011557:Pseudorabies / Q000517:prevention & control*; D013552:Swine / Q000276:immunology*; D013553:Swine Diseases / Q000517:prevention & control*; D014765:Viral Vaccines / Q000008:administration & dosage
chemical_list: D014765:Viral Vaccines
vernacular_title: Het effect van 'driemaal per jaar voor-de-voet-wegenten van zeugen' tegen de ziekte van Aujeszky op de maternale immuniteit van een fokbedrijf.