That of Canicola and Hebdomadis were all 3.40%.The highest GMT of these serum samples were Icterohaemorrhagiae, Hebdomadis and Canicola, and three kinds of GMT were all 1:53.70.

• 耕牛血清标本的几何平均滴度(GMT)以黄疽出血群、犬群、七日热群最高，均为1:53.；70。