PARASITOLOGY. 205 



Distributiojt. — Found in America and Europe. 



Description. — These protozoa are elliptical micro- 

 scopic bodies from twelve to fifteen microns long by 

 seven to ten microns broad, and are found in pairs. 

 In the center is a small granular nucleus. 



Life Cycle. — The protoplasm of the parent cell di- 

 vides into four elongated spores, which are capable 

 of invading new tissues, and which develop into 

 mature form. 



Animals Infested. — The ox, dog and rabbit. 



Parts Infested. — Air passages and bowels. 



Condition Produced. — Catarrhal inflammation of 

 nitestinal mucosa, lodged immediately beneath the 

 epithelial cells ; they are not attributed as causing 

 serious disturbance. They have been found in the 

 intestinal mucosa of healthy dogs. 



CocciDiuM Perforans (Per — through) 



(For are — to bore). 



Distribution. — Reported in European countries; 

 first reported in cattle in 1877. 



Description. — Rather ovoid in shape, measuring 

 twenty-five to thirty-five microns long and fourteen 

 to twenty microns broad; the adult produces corpus- 

 cles which invade the tissue and develop to full adult 

 size. 



Animal Infested. — The dog. 



Parts Infested. — Intestines. 



Condition Produced. — They are found infesting the 

 the upper air passage ; thickening and inflammation 

 of the mucosa of the stomach and the intestines : the 

 mesenteric lymph glands, liver and spleen are also in 

 a state of inflammation. The lesions all contain the 

 coccidia. 



