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首页> 外文期刊>Livestock Science >Effects of sub-clinical post-weaning colibacillosis and dietary protein on acute phase proteins in weaner pigs
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Effects of sub-clinical post-weaning colibacillosis and dietary protein on acute phase proteins in weaner pigs

机译：断奶后亚临床大肠杆菌病和日粮蛋白对断奶仔猪急性期蛋白的影响

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There is an increasing body of evidence that plasma acute phase proteins (APP) can be used as a marker to assess pig health. The objective of this study was to assess whether experimentally induced sub-clinical post-weaning colibacillosis (PWC) affects the concentration of two plasma APP, i.e. haptoglobin (Hp) and C-reactive protein (CRP). Since sub-clinical PWC is sensitive to protein supply, we additionally assessed whether these APP responses are sensitive to dietary protein contents. Weaned pigs(6 groups of 9 each) were offered one of the three foods, i.e. H (230 g CP/kg), L (130 g CP/kg) or HA (23% CP with anti-microbial growth promoters). On day 5 post-weaning, pigs were either dosed with 10~8 colony forming units of enterotoxigenic E. coli or were sham-infected. Three days later and across feeding treatments, infection had reduced feed intake. Feeding and infection treatment significantly interacted for both Hp and CRP. Infection increased Hp concentration in H and HA pigs, but not in L pigs, whilst infection increased CRP concentration to a larger extent in HA pigs than in H and L pigs. The results suggest that sub-clinical PWC leads to changes in APP profiles and that these changes may be sensitive to dietary protein contents. Usefulnessof APP to describe health status in pigs may therefore need to be considered in relation to their nutritional environment.
机译：越来越多的证据表明血浆急性期蛋白（APP）可用作评估猪健康的标志物。这项研究的目的是评估实验诱导的断奶后亚临床大肠杆菌病（PWC）是否影响两种血浆APP的浓度，即触珠蛋白（Hp）和C反应蛋白（CRP）。由于亚临床PWC对蛋白质供应敏感，因此我们另外评估了这些APP反应是否对膳食蛋白质含量敏感。为断奶的猪（6组，每组9只）提供三种食物之一，即H（230 g CP / kg），L（130 g CP / kg）或HA（23％CP，带有抗微生物生长促进剂）。断奶后第5天，给猪饲喂10〜8个产肠毒素大肠杆菌的菌落形成单位或进行假感染。三天后，通过各种喂养治疗，感染减少了采食量。喂养和感染治疗对Hp和CRP都有显着影响。感染增加了H和HA猪的Hp浓度，但没有增加L猪，而感染增加了HA猪的CRP浓度，比H和L猪更大。结果表明，亚临床PWC会导致APP谱的变化，并且这些变化可能对饮食中的蛋白质含量敏感。因此，可能需要考虑APP的营养状况来描述猪的健康状况。

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