Mumford J A, Wood J M, Folkers C, Schild G C
Equine Virology Unit, Animal Health Trust, Newmarket, Suffolk.
Epidemiol Infect. 1988 Jun;100(3):501-10. doi: 10.1017/s0950268800067236.
Thirty-one ponies immunized with inactivated virus vaccine containing A/equine/Miami/63 (H3N8) virus and six seronegative ponies were experimentally challenged with the homologous virus strain. All 6 unvaccinated ponies and 11 out of 31 vaccinated ponies became infected. A clear relationship between pre-challenge antibody, measured by single radial haemolysis (SRH), and protection was demonstrated as judged by virus excretion, febrile responses and antibody responses. Those ponies with SRH antibody levels greater than 74 mm2 were completely protected against challenge infection by the intranasal route.
用含有A/equine/Miami/63(H3N8)病毒的灭活病毒疫苗免疫31匹小马,并对6匹血清阴性小马用同源病毒株进行实验性攻毒。所有6匹未接种疫苗的小马和31匹接种疫苗的小马中的11匹被感染。通过单次放射溶血法(SRH)测定的攻毒前抗体与保护之间存在明显关系,这通过病毒排泄、发热反应和抗体反应来判断。SRH抗体水平大于74平方毫米的小马通过鼻内途径完全受到保护,免受攻毒感染。