Serologic evidence of E. suis exposure include the indirect hemagglutinaton test (IHA), complement fixation test (CFT) and enzyme linked immunosorbent assay (ELISA), however, absence the regular of antibody change, artificial negative is constantly.

• 血清学诊断方法包括间接血凝试验(IHA)、补体结合试验(CFT)和酶联免疫吸附试验(ELISA)等,但由于附红细胞体抗体水平的变化没有规律而常出现假阴性的结果。