in this study , the opsonic activity of normal csf for laboratory and blood culture isolates of staphylococcus aureus , streptococcus pneumoniae , escherichia coli , hemophilus influenzae type b , and neisseria meningitidis was measured by a quantitative assay employing radiolabeled bacteria and polymorphonuclear leukocytes .
C0027575
neisseria meningitidis
C0004611
bacteria