. 2020 Jul 3;7:384. doi: 10.3389/fvets.2020.00384

Table 1.

Lesions and pathogenicity of Eimeria spp. in chickens.

Host	*Eimeria*	Location—Lesions	Pathogenicity^*
Chickens	E. acervulina	Duodenum, Jejunum. Lesions include numerous whitish, oval, or elongated patches in the upper half of the small intestine, which may be easily distinguished on gross examination.	++
	E. brunetti	Ileum, Rectum. The mucosa is pale and disrupted but lacking in discrete foci, and may be thickened. In severe infections, coagulative necrosis and sloughing of the mucosa occurs throughout most of the small intestine.	+++
	E. maxima	Duodenum, Jejunum, Ileum. It causes dilatation and thickening of the wall; petechial hemorrhage; and a reddish, orange, or pink viscous mucous exudate and fluid.	++
	E. mitis	Duodenum, Jejunum. Lesions are indistinct but may resemble moderate infections of E brunetti.	+
	E. necatrix	Jejunum, Caeca. Major lesions in the anterior and middle portions of the small intestine. Small white spots, usually intermingled with rounded, bright-, or dull-red spots of various sizes, can be seen on the serosal surface.	+++
	E. praecox	Duodenum, Jejunum. Decrease rate of growth	+
	E. tenella	Caeca	+++

, non-pathogenic; +, low pathogenic; ++, moderately pathogenic; +++, highly pathogenic.