A composition useful in oral immunisation of animals such as poultry comprises dry free-flowing particles each consisting of a solid beadlet of lipid-continuous emulsion containing from about 25% to about 50% by weight water in a lipid, such as hardened palm kernel oil, having a slip point in the range 35 to 45°C, each beadlet having an average diameter of about 2 to 3 millimetres and containing at least 1 viable encysted protozoan, such as a sporulated oocyst of a species of coccidium infective to poultry, each beadlet having a protective coating of animal feed, cement and/or gypsum, the protective coating having an average thickness of about 0.2 to 2mm.
一种用于家禽等动物口服免疫接种的组合物包括干的自由流动颗粒,每个颗粒由固体微珠组成,微珠为脂质连续乳液,含
水量约为 25%至 50%(按重量计),含在脂质(如硬化棕榈仁油)中,滑点在 35 至 45°C 范围内、每个微珠的平均直径约为 2 至 3 毫米,并含有至少 1 个可存活的包囊原生动物,例如可感染家禽的球虫孢子卵囊,每个微珠都有一层动物饲料、
水泥和/或
石膏保护层,保护层的平均厚度约为 0.2 至 2 毫米。