Yes, the U.S. Centers for Disease Control and Prevention is at the national level, in a sense our counterpart in the U.S, as are such other similar public organizations as the Health Protection Agency in the U.K. We use the same laboratory diagnostic standards.
The other types of testing you're referring to are offered, as I mentioned, by private laboratories in the U.S. The types of testing they offer sometimes use methodologies that have not been validated and established as being accurate.