The sixteenth amendment to the Constitution of the United States was proposed to the legislatures of the several States by the Sixty-first Congress on the 12th of July, 1909, and was declared, in a proclamation of the Secretary of State, dated the 25th of February, 1913, to have been ratified by 36 of the 48 States.
3 How long should you wait in order to repeat a TB test ? Dr. Lokesh Guglani Dr. Guglani. Generally 6 weeks: The need to repeat a TB test generally depends on each individual's previous test results, presence of symptoms & risk factors for exposure to tb. An interval of at least 6 weeks is generally recommended.
Testing mucus from the lungs (sputum culture) is the best way to diagnose active TB. But a sputum culture can take 1 to 8 weeks to provide results. Sputum cytologySputum cytology.