Spray-dried animal plasma sourced from bovine, porcine or other animal origin is often used as a main feed ingredient in the diets of weanling piglets to improve growth performance. The objective of this study was to determine the effect of animal plasma in diets on the performance of piglets in the post-weaning period, with and/or without pathogenic challenge, by undertaking a meta-analysis. Data were extracted from peer-reviewed reports published in scientific journals. The average initial weight of the piglets was 5.8 kg and the average initial age 19 days (2–56 days). The average duration of feeding animal plasma was 40 days. Average daily gain (ADG), feed intake (ADFI) and feed conversion ratio (FCR) were found to be 22–28 g/day, 20–27 g/day and −0.28 to 0.06 g/g. Generally, diet supplemented with spray-dried bovine plasma (SDBP) improved the ADG of the piglets and spray-dried porcine plasma (SDPP) led to increases in the ADFI. For the first week post-weaning alone, as the dietary animal plasma percentage increased there was an increase in ADG and ADFI; similarly, the latter two measures increased as weaning age increased. The evidence suggests that mainly IgG present in animal plasma prevents the binding of pathogens to the gut wall and reduces the incidence of sub-clinical infection in the post-weaning stage. Animal plasma containing IgG appears to be a useful in-feed supplement for piglets in the post-weaning phase.

中文翻译：

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喷雾干燥动物血浆对断奶仔猪生长性能的影响——综述

来自牛、猪或其他动物来源的喷雾干燥动物血浆通常用作断奶仔猪日粮中的主要饲料成分，以提高生长性能。本研究的目的是通过荟萃分析确定饲料中动物血浆对断奶后仔猪生产性能的影响，有和/或没有致病性攻击。数据是从发表在科学期刊上的同行评审报告中提取的。仔猪的平均初始体重为 5.8 kg，平均初始日龄为 19 天（2-56 天）。喂养动物血浆的平均持续时间为 40 天。发现平均日增重 (ADG)、采食量 (ADFI) 和饲料转化率 (FCR) 为 22-28 克/天、20-27 克/天和 -0.28 至 0.06 克/克。一般来说，添加喷雾干燥牛血浆 (SDBP) 的日粮提高了仔猪的 ADG，喷雾干燥猪血浆 (SDPP) 导致 ADFI 增加。仅在断奶后的第一周，随着日粮动物血浆百分比的增加，ADG 和 ADFI 也增加；同样，后两项措施随着断奶年龄的增加而增加。证据表明，主要存在于动物血浆中的 IgG 可防止病原体与肠壁结合，并降低断奶后亚临床感染的发生率。含有 IgG 的动物血浆似乎是断奶后仔猪的一种有用的饲料补充剂。随着膳食动物血浆百分比的增加，ADG 和 ADFI 增加；同样，后两项措施随着断奶年龄的增加而增加。证据表明，主要存在于动物血浆中的 IgG 可防止病原体与肠壁结合，并降低断奶后亚临床感染的发生率。含有 IgG 的动物血浆似乎是断奶后仔猪的一种有用的饲料补充剂。随着膳食动物血浆百分比的增加，ADG 和 ADFI 增加；同样，后两项措施随着断奶年龄的增加而增加。证据表明，主要存在于动物血浆中的 IgG 可防止病原体与肠壁结合，并降低断奶后亚临床感染的发生率。含有 IgG 的动物血浆似乎是断奶后仔猪的一种有用的饲料补充剂。