the observed increase in anti-ppd igg was rather small but comparable to that seen in 17 newly diagnosed tuberculosis patients with negative direct smear [ mean od ( sd ) : 0.59 ( 0.38 ) in vaccinated and 0.70 ( 0.48 ) in patients ] but significantly lower ( p less than 0.001 ) than that seen in 31 newly diagnosed patients with positive direct smear [ mean od ( sd ) : 1.07 ( 0.67 ) ] .
C0034131
ppd
C0041296
tuberculosis