Which is more accurate for tuberculosis testing: culture or something like pcr?

See below. Pcr can detect TB sooner than culture. Generally both are used. For additional information, consult the website given below. http://www.cdc.gov/mmwr/preview/mmwrhtml/mm5801a3.htm?s_cid=mm5801a3_e.
Both are good. Pcr helps in quicker diagnosis while culture can take 6 weeks but helps in finding sensitivity of TB bacilli to different drugs.