opsonic activity to three test organisms ( escherichia coli 286 and on 2 , and staphylococcus aureus ) and to 15 blood stream isolates from 14 patients was measured as serum-dependent uptake of heat-killed 14c-labeled bacteria by normal donor leukopheresis granulocytes in an in vitro assay and compared with results obtained with a standard normal serum in each assay .
C0029235
organisms
C0004611
bacteria