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  • Title: [Screening of latent tuberculosis infection in health care workers by QuantiFERON-TB and tuberculin skin test].
    Author: Ciaschetti A, Franchi A, Richeldi L, Rumpianesi F, Meacci M, Valente A, Franco G.
    Journal: G Ital Med Lav Ergon; 2007; 29(3 Suppl):406-7. PubMed ID: 18409747.
    Abstract:
    UNLABELLED: Recent guidelines (MMWR 2005) recommend the use of QuantiFERON-TB (QFT-TB) as an alternative to the tuberculin skin test (TST) for the screening of latent tuberculosis infection (LTBI) in health care workers (HCWs). MATERIALS AND METHODS: 590 HCWs were screened for LTBI by TST and QFT-TB. Results were compared with risk factors for LTBI, determined by questionnaires. RESULTS: Both tests were significantly associated with non-Italian nationality [TCT (OR = 9.17), QFT-TB (OR = 3.65)], age > or = 45 years old [TCT (OR = 1.81), QFT-TB (OR = 2.36)], history of household contacts [TCT (OR = 2.65), QFT-TB (OR = 3.37], occupational exposure to tuberculosis (TB) patients [TCT (OR = 2.14), QFT-TB (OR = 1.93)]. 55 cases were discordant (28 QFT-TB-negatives/TCT-positives; 27 QFT-TB-positives/TCT-negatives). Both tests were not associated with workplace risk factors or TB risk level assessed in different hospital units. CONCLUSIONS: In HCWs employed in a low TB incidence area both QFT-TB and TCT were more associated with non occupational risk factors (nationality, age, household contacts) than with main determinants of workplace risk for LTBI.
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