Until 31 December 1992, Member States in which all collection centres contain only animals which have not been vaccinated against Aujeszky's disease giving a negative reaction to the serum neutralization test, or to the ELISA test for Aujeszky's disease, in accordance with the provisions of this Directive: ... - may not prohibit the admission of semen from boars which have been vaccinated in the collection centre with the G1 deleted vaccine, provided that: - such vaccination has only been carried out on boars that were serum-negative with regard to the virus of Aujeszky's disease, - serological examinations carried out at the earliest three weeks after vaccination of such boars do not reveal the presence of antibodies induced by the disease virus.
Online Language Learning Tool SkELL allows users to search for phrases in sentences, collocates and similar words. These examples have been automatically selected and may contain errors.
