Study on the antigenicity of Theileria sergenti merozoite in Korean native cattle

Baek, Byeong-kirl; Kim, Byeong-su; Rhee, Jae-ku

Korean Journal of Veterinary Research 1990;30(2):223-229.

Byeong-kirl Baek, Byeong-su Kim, Jae-ku Rhee

College of Veterinary Medicine, Chonbuk National University

한우(韓牛)에 있어서 Theileria sergenti의 항원성(抗原性)에 관(關)한 연구(硏究)

백병걸, 김병수, 이재구

경북대학교 수의과대학

Abstract

A splenectomized 5-month-old calf was inoculated with cryopreserved Theileria sergenti infected blood originated from naturally infected Korean native cattle in Chonbuk district. At peak parasitemia (40.1%), blood was collected, washed, lysed and then the T sergenti merozoite was isolated by differential centrifugation. Antigenic profile of isolated T sergenti organism was analized by SDS-PAGE and western blotting techniques. Coomassie blue stained SDS-PAGE gel revealed at least twelve protein bands of approximately 14Kd, 28Kd, 30Kd, 34Kd, 36Kd, 38Kd, 41Kd, 56Kd, 66Kd, 72Kd, 97Kd and 116Kd in the merozoite homogenate. In western blot, although T sergenti antigen recognized by specific anti-T sergenti antibodies demonstrated 28Kd, 30Kd, 38Kd, 56Kd, 58Kd, 66Kd, 97Kd and 116Kd proteins. False positive reactions were also observed in normal bovine serum with T sergenti and normal erythrocytic antigens. Therefore, predominant proteins of T sergenti merozoite antigen were found to be 28Kd, 30Kd, and 41Kd proteins of molecular weights. On going studies we will analyze the relative importance of those antigens for immunity of T sergenti in Korean native cattle.

Key Words: Theileria sergenti, SDS-PAGE, western blot, molecular weight