the high natural resistance of gonococci showing a characteristic 'double highlight ' ( dh ) colonial morphology ( penn , veale & smith , 1977b ) to intracellular killing by human phagocytes was markedly reduced by addition of rabbit antiserum to the phagocytosis medium or by preincubation of organisms with antiserum .
C0031307
phagocytes
C0031308
phagocytosis