Development of A Standardized Opsonophagocytosis Killing Assay for . . . The OPKA is an easily transferable assay with accessible standard reagents and will be a valuable tool to assess GBS-specific antibodies in natural immunity and vaccine studies Keywords: Group B Streptococcus ; opsonophagocytosis assay ; OPKA ; correlates of protection ; neonatal antibodies ; vaccines ; transplacental antibodies
Physiology, Opsonization - StatPearls - NCBI Bookshelf Opsonophagocytosis killing assay (OPKA), is an in vitro assay commonly used in vaccine research It can quantitatively measure antibody-mediated opsonophagocytosis Researchers have used OPKA in studying various pathogens that have caused substantial deaths worldwide