S Antigen Typing – Patient Selenium, Urine S-100 Protein by Immunohistochemistry Semen Analysis, Post Vasectomy S-100B Protein, Serum S100B, CSF Saccharomyces cerevisiae Antibodies, IgG & IgA Salicylate Assay Sal-like 4 (SALL4) by Immunohistochemistry Salmonella typhi and paratyphi Antibodies Schistosoma Antibody, IgG Scleroderma (Scl-70) (ENA) Antibody, IgG Sd(a) Antigen Typing, Patient SDHB with Interpretation by Immunohistochemistry Secretin Sedimentation Rate, Westergren (ESR) Selenium, RBCs Selenium, Serum or Plasma Signal Recognition Particle (SRP) Antibody Smooth Muscle Actin (SMA) by Immunohistochemistry