By vgreene, 15 August, 2017 Sputum exam for AFB smear and cx indicated if positive test result and either abnl CXR or presence of resp sx (even if CXR negative)
By vgreene, 15 August, 2017 Perform CXR; also warranted if high-risk contact w/o positive test result20
By vgreene, 15 August, 2017 Either IGRA or TST may be used w/o preference, w/ the following considerations:
By vgreene, 15 August, 2017 For contacts17 of person w/ infectious TB dz w/ initial negative TST/IGRA, retest18 8-10wk after exposure has ended; also obtain CXR if
By vgreene, 15 August, 2017 Test HIV-infected persons for LTBI as soon as HIV status becomes known; consider annual testing if initial TST/IGRA negative and at risk for exposure to Mtb16
By vgreene, 15 August, 2017 Routine testing w/ both TST and IGRA not recommended, although both may be useful in some situations14,15
By vgreene, 15 August, 2017 If individual may be tested periodically (eg, HCW), perform “2-step method”11 at time of initial TST
By vgreene, 15 August, 2017 Administer TST (Mantoux tuberculin skin test) by intradermal injection of 0.1 mL of 5 TU PPD, read w/in 48h-72h8 and interpret based on mm of induration, pt’s risk of acquiring TB infxn, or risk of progression to dz if infected;9 interpret TST test rxns b
