This document summarizes various serological tests used to detect antigens and antibodies, including: - Primary tests like ELISA, IFAT, RIA that detect markers - Secondary tests like agglutination, complement fixation, precipitation that detect interactions - Tertiary tests that assess protective value of antiserum in animals It then provides details on specific tests like agglutination, Coombs test, hemagglutination inhibition, precipitation, complement fixation, ELISA and their applications in medicine, food/plant pathology, and quality control.

1. Serological tests (Antigen antibody interactions) Prepared by: mahmoud alhabib Supervised by:Dr.Hissham Rdduan

20. To detect antibody ( indirect ELISA ):

23. To detect antigen ( sandwich ELISA ):

25. Competitive binding