冷凝集素（cold agglutinin）是冷反应型抗红细胞抗体，在O一5℃时最易和红细胞膜抗原结合，是IgM型，是较强的凝集红细胞的一种可存在于正常人血清中的抗体，低效价一般没有临床意义。
高效价冷凝集素标本水浴前涂片染色镜检可见红细胞聚集成团现象，水浴后则无此现象。
There is erythrocyte aggregation by smear dyeing in high-valence cold agglutinins samples before the bath and no results was observed after the bath.
此病人除有免淋的全部形态学三联症及异常蛋白血症外，还伴有乙型肝炎表面抗原血症及冷凝集素血症。
The patient not only had all the morphologic triad of IBLD with dysproteinemia but also associated with HBsAg and cold agglutinin existing in his blood.
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