a repetition of these experiments has revealed : ( a ) that the cellular content of the leucocytic suspensions used in the phagocytic tests was of a different order of magnitude from that of the exudates which usually exist in infected tissues , ( b ) that the suspensions were too dilute to allow surface phagocytosis of pneumococci to occur , and ( c ) that the ratio of bacteria to leucocytes . was such that , when a sufficiently concentrated exudate was employed , the pneumococci injured the leucocytes and thus prevented phagocytosis from taking place .
C0007634
cellular
C0031308
phagocytosis