E. adenoides

Some of the characteristics of E. adenoides include the following:

Average size of the oocyst (µm)	25.6 x 16.6
Shape	Oval
Prepatent period	103 hours
Minimal time of sporulation	24 hours

 
E. adenoides infect the lower ileum, caeca and rectum. The development stages are found in the epithelial cells of the villi and crypts. The affected portion of the intestine may be dilated and have a thickened wall. Creamy or caseous contents may be found in the caeca pouches or intestine. The droppings may present white caseous material, traces of blood and a lot of mucous. 

According to the lesion scale developed in AFSSA-Ploufragan, the lesions caused by E. adenoides can be described in the following way:

Score 0:		Normal caecal pouches. The contents are homogenous, creamy and without abnormalities. The colour of the contents may vary from light beige to dark brown.
Score 1:		Presence of some caseous clots and petequial haemorrhages at the tip of the intestinal villi.
Score 2:		Presence of caseous aggregates that may deform the caeca wall. The caeca content is creamy and liquid.  Progressive dehydration of the caecal contents. Petequeial haemorrhages are present in the intestinal villi.
Score 3:		Presence of white mucous material that tends to compact in the caecal lumen. Diffuse petequial haemorrhages at the intestinal villi level and evident longitudinal folds in the caecal wall. The petequial haemorrhages extend to the colon. The deformation of the intestinal wall is greater with a loss of some flexibility of the caecal pouches.
Score 4:		Presence of caseous and fibrino necrotic material in the caeca.  Haemorrhagic lesions that may involve the colon and the final part of the ileum. Deformation and a total loss of flexibility of the caecal pouches.

The lesions are visible on day 4 to 6 post infection.