Ten years ago, a colleague’s purified protein derivative (PPD) test was read by several physicians as being positive at 13-mm induration. Disturbed by the results, we tried testing with PPD again. The ...

The literature shows that the incidence of tuberculosis (TB) is higher in kidney transplant recipients compared with the general population. TB prophylaxis is usually given to recipients (not donors) ...

At what point should a patient have repeat chest x-ray after reporting a prior (10 years ago) positive purified protein derivative (PPD) result with subsequent isoniazid therapy? The patient reports ...

What is the role of the polymerase chain reaction (PCR) process in the diagnosis of abdominal tuberculosis (TB) and in differentiating it from Crohn's disease? Tuberculosis may involve any part of the ...