Abstract:
Disclosed is a method for detecting a target antigen in a fluid sample of an individual. In preferred embodiments, the fluid sample is urine, cerebral spinal fluid, or synovial fluid. After an optional concentration step, the fluid sample is passed through a membrane suitable for binding the target antigen, thereby binding the target antigen to the membrane. Target antigen, bound to the membrane, is then detected using an antibody specific to the target antigen.