确定的事
发表于 2025-3-28 15:30:03
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Vertical
发表于 2025-3-28 20:57:33
Laboratory Diagnosis, world. Highly successful vaccination programmes have dramatically reduced natural outbreaks of MD in commercial chickens. However, vaccination has not eradicated MD and outbreaks continue to occur sporadically, hence the need for proper diagnosis of the disease.
惊奇
发表于 2025-3-29 00:55:18
Immunity,s are responsible for mounting immune responses, some of which may contribute to protection while others may be involved in the pathology of the disease, and it is the same cell type that is the primary target for infection with Marek’s disease virus (MDV). Infection may be lytic, resulting in cell
Promotion
发表于 2025-3-29 03:56:56
Principles of Vaccination,main means by which the disease can be controlled. The first practical vaccine for MD was developed by Churchill .. (1) and consisted of an attenuated serotype 1 MD virus (MDV). This development followed shortly the isolation of the causative herpesvirus of MD and its propagation in tissue culture.
chance
发表于 2025-3-29 08:08:20
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暂时别动
发表于 2025-3-29 12:42:53
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人工制品
发表于 2025-3-29 18:49:13
Genetic Resistance,ce of the disease differed amongst families (1–4). In 1935, Hutt and Cole (5) initiated their classic studies which were to prove that selection for genetic resistance could constitute a practical method for the control of disease in poultry flocks. Two resistant strains, K and C, and one susceptibl
飞行员
发表于 2025-3-29 21:54:17
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Anticlimax
发表于 2025-3-30 02:15:34
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退出可食用
发表于 2025-3-30 05:15:10
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