LEUKOCYTOSIS. 163 



2. Slight infection slight resistance; leukocytosis present, 



but not marked. 



3. In fulminating infections \ve may have no increase in 



whites, but a higher percentage of polymorphonuclears. 



4. Slight infection and good resistance may not be pro- 



ductive of leukocytosis. 



Spirochaeta fevers, as relapsing fever, may give a leukocytosis of 

 from 25,000 to 50,000. 



Small-pox, especially at time of pustulation, plague, scarlet fever 

 and liver abscess give a leukocytosis of from 12,000 to 15,000. 



FIG. 52. Leukocytosis (40,000); sixteen polymorphonuclears in field. (Cabot.) 



Erysipelas and epidemic cerebrospinal meningitis also give a 

 leukocytosis of from 15,000 to 20,000. In malignant diseases we some- 

 times have a moderate leukocytosis. Rogers states that in liver abscess, 

 with a leukocytosis of 15,000 to 20,000, we have onlyabout 75 to 77% 

 of polymorphonuclears there being also a moderate increase in the 

 percentage of large mononuclears. 



LYMPHOCYTOSIS. 



Of course, the disease in which we have the most marked lymphocy- 

 tosis is lymphatic leukaemia. 



Whooping-cough may give a lymphocytosis of 20,000 to 30,000. 



