Choosing appropriate criteria for tuberculin positivity and conversion in a long-term care facility.


OBJECTIVES The Centers for Disease Control and Prevention has issued new criteria for conversion of the tuberculin skin test; in persons over 35 years of age, an increase in induration of at least 15 mm is considered indicative of new tuberculous infection. We reviewed our experience in a tuberculosis control program in a long-term care facility to assess… (More)


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