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A 32-year-old man undergoes skin testing with purified protein derivative. His tuberculin test reveals an induration of 8 mm, which is considered positive by the infectious disease physician. This is because the patient
a. Is healthy.
b. Is Iv drug abuser.
c. Is a recent immigrant from a highly endemic country.
d. Is immune compromised.
e. Is health care worker.
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hmmm C or A?? if he was immune comprimised, the test would not show a induration, it would be a false negative... for example in somone with AIDs who have a low CD4...
Some people from other countries have a positive PPd, because they have received the BCG vaccine
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D
5 mm or more is positive in
HIV-positive person
Recent contacts of TB case
Persons with nodular or fibrotic changes on chest x-ray consistent with old healed TB
Patients with organ transplants and other immunosuppressed patients
10 mm or more is positive in
Recent arrivals (less than 5 years) from high-prevalence countries
Injection drug users
Residents and employees of high-risk congregate settings (e.g., prisons, nursing homes, hospitals, homeless shelters, etc.)
Mycobacteriology lab personnel
Persons with clinical conditions that place them at high risk (e.g., diabetes, prolonged corticosteroid therapy, leukemia, end-stage renal disease, chronic malabsorption syndromes, low body weight, etc.)
Children less than 4 years of age, or children and adolescents exposed to adults in high-risk categories
15 mm or more is positive in
Persons with no known risk factors for TB
