252 CLINICAL BACTERIOLOGY AND HEMATOLOGY 



may be reached. These latter are liable to be mistaken for acute 

 peritonitis, but the leucocytes do not give the iodine reaction. 

 Further, malignant ovarian tumours usually cause slight leucocytosis 

 and decrease of reds ; this has been suggested as of diagnostic 

 importance, but it might be due to so many other conditions that 

 not much reliance can be placed on it. A normal condition of the 

 blood, however, would be some evidence against malignancy. In 

 tulal gestation the blood is normal. After rupture there is anaemia 

 and increase of the leucocytes, which may reach 24,000 or more. 



Pemphigus, Dermatitis Herpetiformis, and Erythema 

 Multiforme, are associated with a high percentage of eosino- 

 philes, and this is of importance in the diagnosis of these diseases 

 from local infective processes, which they often closely resemble. 

 The eosinophiles in the former group of diseases may be expected 

 to exceed 10 per cent., and may be much higher, and there may 

 be a high leucocytosis. 



