PPD skin test

PPD skin test

PPD test Tuberculosis A test for detecting exposure to M tuberculosis. See PPD.
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CSF Gram stain and cultures were negative, as were a chest x-ray and PPD skin test for TB.
Two months before presentation, she required hospitalization for partial small bowel obstruction, at which time infliximab was started after a negative PPD skin test.
If lymph node enlargement persists despite antibiotics, yet an infectious or inflammatory cause is still suspected, further evaluation may include a PPD skin test and chest radiograph (1) (SOR: C, expert opinion).
As with AIDS patients, a 5-mm PPD skin test is considered positive.
Consider an induration of 15 mm or greater as a positive PPD skin test in high-risk areas and high-risk populations, he advised.
In addition, positive skin test reactions occur in people who have received BCG vaccine, thus limiting the effectiveness of the PPD skin test to identify new infections.
A recently developed alternative is the interferon-gamma assay (QuantiFERON-TB Gold test), which may be used in place of, or in addition to, the PPD skin test for patients who are known to have received a BCG vaccine (SOR: B, extrapolation from a validation cohort study).
Additional history indicated a recently positive PPD skin test (within 6 months), followed by isoniazid therapy for 4 months.
Interpretation of the PPD skin test in BCG vaccinated children.
The PPD skin test and controls and the results of the serology for C immitis were negative.