Cargill C F, Olson L D
Can J Comp Med. 1973 Apr;37(2):107-11.
Serum from both immune and nonimmune ten-week-old swine contained factors which promoted phagocytosis of group E Streptococci (GES). The factors in nonimmune serum, which were heat labile at 70 degrees C for ten minutes, were less efficient than the factors present in immune serum.Bactericidal activity of the polymorphonuclear (PMN) leukocytes against GES was observed with serum from both immune and nonimmune ten-week-old swine, as well as with serum from normal sows and piglets. However, the bactericidal activity of PMN leukocytes in serum from either normal sows or immune ten-week-old swine was greater than the bactericidal activity of PMN leukocytes in either piglet serum or serum from nonimmune ten-week-old swine. When the serum was either heated to 70 degrees C for ten minutes or treated with 2-mercaptoethanol, bactericidal activity of PMN leukocytes against GES was only observed in the presence of immune serum.
免疫和未免疫的10周龄猪的血清中均含有促进E组链球菌(GES)吞噬作用的因子。未免疫血清中的因子在70℃下加热10分钟后不耐热,其效率低于免疫血清中的因子。在免疫和未免疫的10周龄猪的血清中,以及正常母猪和仔猪的血清中,均观察到多形核(PMN)白细胞对GES的杀菌活性。然而,正常母猪或免疫10周龄猪血清中PMN白细胞的杀菌活性高于仔猪血清或未免疫10周龄猪血清中PMN白细胞的杀菌活性。当血清加热至70℃10分钟或用2-巯基乙醇处理时,仅在免疫血清存在的情况下观察到PMN白细胞对GES的杀菌活性。