232 NORMAL AND PATHOLOGICAL BLOOD 



The eosinophilia tends to disappear when the anaemia becomes very 

 severe. 



Echinococcus infection has an eosinophilia which disappears when the cyst is 

 removed. Continuance of the eosinophilia indicates that all cysts were not gotten 

 rid of. 



The eosinophilia of trichinosis is best known, and a combination of 

 this blood finding with fever and marked pains of muscles, would 

 justify the excision of a piece of muscle for examination for encysted 

 embryos. 



In true asthma eosinophilia is marked, and its absence is of value in indicating 

 other causes for the condition. Certain skin diseases, especially pemphigus, show 

 eosinophilia. Blastomycoses are usually found to show eosinophile increase. 



Eczema and psoriasis are not apt to give more than 3 or 4% eosino- 

 philes. A rather high degree of eosinophilia is found in mycosis 

 fungoides. 



Scabies also gives an eosinophilia. 



The proportion of eosinophiles in the blood of children is greater 

 than in that of adults. 



Increase of both eosinophiles and mast cells is found in myelogenous leukaemia. 



An eosinophilia tends to appear following splenectomy. With a Wright stain 

 showing acid tendencies one may count polymorphonuclears as eosinophiles unless 

 noting smaller size of granules. 



LEUKOCYTOSIS 



It is to an increase in the polymorphonuclears that this term is 

 usually applied, the term lymphocytosis or eosinophilia being employed 

 where white cells of eosinophile or lymphocyte nature are increased. 

 We have physiological leukocytosis in the latter weeks of pregnancy, 

 also in the new-born, and in connection with digestion. 



Pathological Leukocytosis. Pneumonia. In this disease we have a 

 leukocytosis of 20,000 to 30,000 or higher. The eosinophiles are al- 

 most absent. A normal leukocyte count in pneumonia makes a prog- 

 nosis unfavorable. 



The leukocyte count drops about the time of the crisis, and with the reappearance 

 of eosinophiles is a favorable sign. 



Toxaemic conditions as uraemia, diabetic coma and poisoning by CO 2 tend to show 

 a leukocytosis. 



