Mutations in the F8 gene cause hemophilia A, while hemophilia B is caused by mutations in the F9 gene. The proteins made by these genes play a critical role in the process of blood clotting.
There are many different types of imaging tests used to diagnose diseases of the digestive system. Computed Tomography (CT Scan) A CT scan, computed tomography, takes multiple X-rays of the body from different angles in a very short period of time.
Tests used to screen for syphilis include: 1  Venereal disease research laboratory (VDRL) test. The VDRL test checks blood or spinal fluid for an antibody that can be produced in people who have syphilis. 2  Rapid plasma reagin (RPR) test. The RPR test also finds syphilis antibodies. 3  Rapid immunochromatographic test.