Sensitivity of G. lamblia to thiuram compounds. The following compounds have the indicated NSC numbers: 1 (disulfiram), NSC 25953; 2, NSC 1771; 5, NSC 527035; 6, NSC 402538; 7, NSC 403854; 9, NSC 290661; 17, NSC 93058; 19, NSC 14561; and 21, NSC 20866. Growth was scored visually at 18 to 20 h as described in the text. 0 signifies no growth, and +4 signifies growth equal to that in the control wells.