The Davidsohn differential test employs which type of blood cells?

The Davidsohn differential test specifically employs human blood cells. This test is primarily used to differentiate between various types of antibodies that may be present in human sera by using specific antigen-antibody interactions. Human blood cells, particularly red blood cells and white blood cells, are integral to the mechanics of the test, as they facilitate the recognition of specific antibodies that react with antigens present in the test samples.

While other species such as cattle, horses, and goats are important in various immunological contexts, they are not applicable for this specific test. The focus on human cells emphasizes the relevance of the assay to human immunology, making them the correct choice for the Davidsohn differential test.