Final answer:
Agglutination tests detect antibodies against bacteria or red blood cells. This method involves clumping or agglutination of cells or particles by antibodies, indicating the presence of antibodies or antigens. Agglutination assays are commonly used in diagnosing diseases and identifying serovars within bacteria species.
Step-by-step explanation:
Agglutination tests look for the presence of antibodies against bacteria or red blood cells. These tests involve the clumping or agglutination of cells or large particles by antibodies, resulting in a visible matrix. Agglutination assays can be performed on glass slides or microtiter plates, and they are commonly used to detect the presence of specific antigens or antibodies in patient serum. The presence of agglutination indicates the presence of antibodies or antigens, which can be useful for diagnosing diseases and identifying serovars within species of bacteria.