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.
There are several tests that may be used when a pertussis infection is suspected: 1  Culture â this test has been the gold standard for identifying pertussis and is used to diagnose a pertussis infection.2  The sample is put into nutrient media and the bacteria are grown and identified.ertussis tests are used to detect and diagnose a Bordetella pertussis infection. Early diagnosis and treatment may lessen the severity of symptoms and help limit spread of the disease.