208 PARASITOLOGY. 



Symptoms.— Loss of appetite, elevation of temper- 

 ature, 102° to 105°; sunken eyes; grinding of teeth; 

 later, fetid diarrhoea; feces may be streaked with 

 blood ; may prove fatal in one or two days, or patient 

 may live two or three weeks. 



Treatment. — Intestinal antiseptics, as eucamphol or 

 kreso solutions. 



CocciDiUM Tenellum. 



Distribution. — 'Found throughout the United States. 



Description. — The resting stage is a small micro- 

 scopic oval cell containing a small nucleus. They have 

 a double enveloping membrane and a granular con- 

 tent. The size varies greatly, being from 15 to 28 

 microns long and 15 to 22 microns broad. 



Life Cycle. — The oocyst divides into four sporob- 

 lasts and these in turn into two sporozoits. When 

 these sporozoits penetrate the epithelial cells they 

 form first trophozoites then schizonts, which gives 

 rise to several merozoites. 



Animals Infested. — Chicks. 



Parts Infested. — Caecum and small intestines. 



Conditions Produced. — 'A local point of inflamma- 

 tion where they invade the mucosa which is followed 

 later by ulceration. It produces a condition in chicks 

 known as white diarrhoea. 



SARCOSPORrDiA (Sporidum — a spore) 

 (Sarx — ^flesh). 



This order, Sarcosporidia, belongs to the class 

 Sporozoa, and includes single-celled parasites that 

 infest the muscle structures. 



