Definition of SBA
SBA - Serum Bactericidal Antibody Assay.
SBA is used as a measure of antibody function in conjunction with complement to kill bacteria.
The assay can give information on whether any particular serum sample has a level (titre) of bacteriocidal antibodies sufficient to reach a protective threshold. SBA assays can also provide a percentage seropositivity (%SP) of subjects suppasing the protective threshold.