 The second study, conducted by Pascoe, et al., compared saliva antibody testing to serum antibody testing using ELISA followed by confirmatory Western Blot analysis in 591 individuals.The accuracy of saliva anti-HIV antibody testing has been confirmed by many additional studies, leading to approval of this method by the U.S. Food & Drug Administration in 2004.Several studies have demonstrated diagnostic potential for salivary hepatitis testing.