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首页> 外文期刊>日本養豚学会誌 >Effects of grouping of piglets on plasma cortisol concentration, lymphocyte blastogenesis and phagocytic function of monocytes in peripheral blood and on intradermal response to pytohaemagglutinin.
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Effects of grouping of piglets on plasma cortisol concentration, lymphocyte blastogenesis and phagocytic function of monocytes in peripheral blood and on intradermal response to pytohaemagglutinin.

机译：仔猪分组对外周血血浆皮质醇浓度，淋巴细胞成纤维细胞和单核细胞吞噬功能的影响以及皮内对焦血凝集素的反应。

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At 63 days of age, 4 specific-pathogen-free (SPF) piglets from a litter of 8 piglets (Group A) were moved to the pen where a litter of 4 (SPF) piglets (Group B) were housed and were reared together for 13 days. The remaining 4 piglets of the litterof 8 piglets were not moved but reared for 13 days as controls. After grouping, all piglets of Group B violently attacked the piglets of Group A and bit their shoulders and ears for 2 h. Plasma cortisol concentration 2 h after grouping was significantlyhigher than 3 days before grouping. Cortisol concentrations decreased to base-line levels 24 h after grouping. No significant difference in plasma cortisol concentration was observed between Groups A and B. The number of total and differential leukocyteswas almost the same throughout the experiment. In Group B, the proliferative responses of peripheral blood mononuclear cells induced with the mitogens phytohaemagglutinin (PHA) and pokeweed mitogen in vitro were significantly decreased on the third dayafter grouping compared with those 3 days before grouping. The intradermal response to PHA in vivo and the phagocytic function of monocytes was significantly reduced in all piglets until 14 days after grouping. In control piglets, a slight increase of plasma cortisol was also found, and the suppression of intradermal response to PHA was observed for 13 days. It is suggested that grouping puts piglets under stress and suppresses the functions of lymphocytes and monocytes for at least 13 days after grouping.
机译：在63日龄时，将来自一窝8头仔猪（A组）的4只无特定病原（SPF）的仔猪移到围栏，圈养四只（SPF）仔猪（B组）的猪并一起饲养持续13天。 8只仔猪的其余4只仔猪不动，但作为对照饲养13天。分组后，B组的所有仔猪都猛烈攻击A组的仔猪，并咬住他们的肩膀和耳朵2小时。分组后2 h血浆皮质醇浓度显着高于分组前3天。分组后24小时，皮质醇浓度降至基线水平。在A组和B组之间未观察到血浆皮质醇浓度的显着差异。在整个实验中，总白细胞和差异白细胞的数量几乎相同。在B组中，与分裂前3天相比，在分裂后第3天，有丝分裂原植物血凝素（PHA）和商陆有丝分裂原体外诱导的外周血单个核细胞的增殖反应显着降低。直到分组后14天，所有仔猪体内对PHA的皮内反应和单核细胞的吞噬功能均显着降低。在对照仔猪中，还发现血浆皮质醇水平略有增加，并且观察到皮内对PHA的反应抑制了13天。建议在分组后至少13天，分组会使仔猪承受压力并抑制淋巴细胞和单核细胞的功能。

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