Bioqual 1 article published in JoVE Immunology and Infection Opsono-Adherence Assay to Evaluate Functional Antibodies in Vaccine Development Against Bacillus anthracis and Other Encapsulated Pathogens Jennifer Chua*1, Donald J. Chabot*1, Tammy Putmon-Taylor1,3, Arthur M. Friedlander2 1Bacteriology Division, United States Army Medical Research Institute of Infectious Diseases, 2Headquarters Division, United States Army Medical Research Institute of Infectious Diseases, 3Bioqual The opsono-adherence assay is an alternative method to the opsono-phagocytic killing assay to evaluate the opsonic functions of antibodies in vaccine development.