title: [Contribution to the antigenic study of influenza viruses in animals. II.--Antibodies, antineuraminidase in horse: conditions of apparition and importance (author's transl)].
abstract: In the first part of this paper the conditions for a specific titration of antibodies against the neuraminidase (N) of each of the two horse virus subtypes are defined. The antigens used are: the H72Neq 1 recombining agent to measure the anti Neq1 antibodies and the A/Duck/Ukraine/63 strain for the anti Neq2 antibodies. The immunity response to neuraminidase appears after the natural disease; this response is studied in two foci, one due to a virus belonging to the A equi I subtype (Loire 73 strain), the other to a virus of the A equi 2 subtype (SHN 73 strain). The kinetics of apparition of anti N antibodies is mostly comparable to that of antihemagglutinin antibodies. The vaccination also induces an immunity response to neuraminidase: the intensity of this response gives an additional information for studying and checking the efficiency of equine i influenza vaccines.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis*; D000917:Antibody Formation; D006385:Hemagglutination Inhibition Tests; D006734:Horse Diseases / Q000276:immunology*; D006736:Horses; D009439:Neuraminidase / Q000276:immunology*; D009975:Orthomyxoviridae / Q000276:immunology*; D009976:Orthomyxoviridae Infections / Q000276:immunology / Q000662:veterinary*; D014611:Vaccination / Q000662:veterinary
chemical_list: D000914:Antibodies, Viral; D009439:Neuraminidase
vernacular_title: Contribution a l'étude antigénique des virus influenza des animaux. II.--Anticorps anti-neuraminidase chez le cheval: conditions d'apparition et importance