ism imposed against staphylococci, this animal Vi/ith an uncom- 

 plicated infection, survived the period of its lowest phago- 

 cytic activitjr and died v.'hen its opsonic index was only slight- 

 ly lower than the normal. 



Experiment 5. — The dog - No. 15 - used in this experi- 

 ment was anesthetized and an incision made in the abdominal wall. 

 The right kidney was exposed and one-third of an agar slant of 

 Staphylococcus aureus injected into the renal pelvis. The dog 

 died in 52 hours with a generalized staphjrlococcus peritonitis 

 and septicemia in addition to the violent reaction in the right 

 kidney. A sample of blood was taken and the following opsonic 

 determinations secured. 



Anatomical Diap-nosis: 



*7ell nourished, generalized staphylococcus 

 peritonitis, septicemia. Staphylococcus aureus 

 in pure culture cultivated from the blood, right 

 kidney and peritoneum. 



Although staphylococci had already appeared in the blood 

 there was no decrease in the opsonic index for this organism. 

 The shock associated with deep and prolonged anesthesia and 



(22) 



