DNA Testing : Introduction & Uses
According to the U.S. Centers for Disease Control (CDC), the number of U.S. laboratories that perform DNA tests for diseases and inherited conditions is growing. The number of specific genetic tests being performed is on the rise as well. DNA tests are performed in a broad range of laboratories, including laboratories that have certificates for chemistry, pathology, clinical cytogenetics, or other medical testing specialties. Although specific nationwide data on DNA test laboratories are not yet available, medical statistics from state programs indicate considerable increases in the numbers of laboratories that perform these tests. In the state of New York alone, the labs that perform DNA testing for inheritable diseases and conditions increased 36 percent in six years, from 25 laboratories in February 2002 to 34 laboratories in October 2008. More recently, the U.S. Centers for Disease Control reported that the number of cystic fibrosis tests has increased significantly since 2001, pursuant to the recommendations of the American College of Obstetricians and Gynecologists and ACMG for preconception and prenatal carrier screening. The DNA-based cystic fibrosis mutation tests are now considered to be some of the most commonly performed genetic tests in the United States and have become an essential component of several state newborn screening programs for confirming presumptive screening results of infants.