INTESTINAL COCCIDIA OF MAN 35 



from men who had been in Egypt, Saloniki, and Meso- 

 potamia. 



The oocysts in the feces are elongate, ovoid in form, 25 

 to 33 microns in length, and 12.5 to 16 microns in width. 

 Two sporoblasts are formed in each oocyst and each sporo- 

 blast produces four vermiform sporozoites. 



b. Eimeria wvnyoni was discovered by Wenyon in 1915 

 and four cases have been recorded. The oocyst is spherical, 

 about 20 microns in diameter and with an outer rough 

 surface. .Within the oocyst are four sporoblasts each con- 

 taining two sporozoites. These are already differentiated 

 when the oocysts are passed by the patient. 



c. Eimeria oxyspora is known from only one case. The 

 oocyst is spherical and about 36 microns in diameter. 

 Within it are four sporoblasts each with two sporozoites. 



3. Methods of Diagnosis. The oocysts of coccidia appear 

 when the feces are treated as described on page 88. Perhaps 

 the best way to become acquainted with them is to examine 

 the feces of rabbits, which are very highly infected. Freshly 

 passed oocysts of the rabbit coccidium, Eimeria stiedae, 

 are almost filled with protoplasm. If the feces are mixed 

 with water the oocysts will develop and within about 48 

 hours four sporoblasts will form within them, each of which 

 will be seen to contain two sporozoites. 



Special Literature on Coccidia 



DOBELL, C.: A Revision of the Coccidia Parasitic in Man. Para- 

 sitology, Vol. 11, pp. 147-197, 1919. 



WENYON, C. M.: Observations on the Common Intestinal Protozoa 

 of Man, Their Diagnosis and Pathogenicity. Journal 

 Royal Army Medical Corps, Vol. 25, p. 600, 1915. 



