By opsonic action is meant the effect which a serum has on (c) opsonic action.
Wright and his followers regard the opsonic index as an index of the power of the body to combat bacterial invasion.
In other forms of infection, vaccines are employed to increase the opsonic power of the blood.
Of these the most important are (a) bacteriolytic or lysogenic action, (b) agglutinative action, and (c) opsonic action.
opsonic op·son·ic (ŏp-sŏn'ĭk)
Of, relating to, or produced by opsonins.