152 Dr. Wright and Capt. Douglas. Action on [July 26, 



application that the invading micro-organisms cultivate themselves in 

 the organism in regions of lowered bacteriotropic pressure. 



Case 1. 



13.4.04. Patient with an alveolar abscess pointing on the cheek. 

 Pus gives a pure culture of staphylococcus. 



A. 



Patient's serum 2 vols. 



A. E. W.'s washed corpuscles. ... 2 



Staphylococcus emulsion 1 TO!. 



Phagocytic index* (average of 20 P.W.B.C.), 30-3. 



B. 



Supernatant fluid from pus 2 vols. 



A. E. W.'s washed corpuscles. ... 2 



Staphylococcus emulsion 1 vol. 



Phagocytic index (average of 20 P.W.B.C.), 5'1. 



Ratio of opsonic index of serum to opsonic index of supernatant fluid 

 from, pus, 1 : 0'17. 



15.4.04. Patient has had fomentations applied to cheek since 

 abscess was opened on 13.4.04. Abscess rapidly healing. 



A. 



Patient's serum 2 vols. 



A. E. W.'s washed corpuscles. ... 2 



Staphylococcus emulsion 1 vol. 



Phagocytic index (average of 20 P.W.B.C.), 10'05. 



B. 



Supernatant fluid from pus .... 2 vols. 

 A. E. W.'s washed corpuscles. ... 2 ,, 

 Staphylococcus emulsion 1 vol. 



Phagocytic index (average of 20 P.W.B.C.), lO'l. 

 Ratio of opsonic index of serum to opsonic index of supernatant fluid 

 of pus, 1 : 1. 



Case 2. 



Patient with patellar abscess. Pus from abscess furnishes a pure 

 growth of streptococcus. 



A. 



Patient's serum 2 vols. 



A. E. W.'s washed corpuscles. ... 2 



Staphylococcus emulsion 1 vol. 



Phagocytic index (average of 20 P.W.B.C.), 14'2. 



The phagocytic index was here, as elsewhere, determined by counting the 



I bacteria ingested in the specified number of polynuclear leucocytes after 



digesting together in a capillary tube for 15 rnins. at 37 C. the serum, corpuscles, 



and bacterial suspension. 



