Helisal saliva assay

Editor, —We read with interest the papers by Reilly et al ( Gut 1997; 40: 454–8) and by Christie et al ( Gut 1996; 39: 27–30) focusing on the Helisal saliva assay (Cortecs Diagnostics, UK) for the diagnosis of Helicobacter pylori infection. These papers reported that this test has a sensitivity of 84–88% and a specificity of 70–71%. Editor,—We read with interest the papers by Reilly et al ( Gut 1997; 40: 454–8) and Christie et al ( Gut 1996; 39: 27–30) focusing on the Helisal saliva …