Table 1.

Pathogenicity, type of disease caused and region of development of the seven recognised species of Eimeria that cause coccidiosis in chickens (Blake and Tomley 2014; Cisman et al. 2020; Horton-Smith and Long 1965; Joyner 1958; Joyner and Davies 1960; Long, 1967; 1968; Reid et al. 2014; Williams 1998)

Eimeria Species	Gross pathological lesions	Haemorrhagic disease	Malabsorptive disease	Region of development
E. brunetti	✓	✓	✕	Lower intestine
E. necatrix	✓	✓	✕	Mid-intestine and caeca
E. tenella	✓	✓	✕	Caeca
E. acervulina	✓	✕	✓	Duodenum
E. maxima	✓	✕	✓	Mid-intestine
E. mitis	✕	✕	✓	Mid-intestine
E. praecox	✕	✕	✓	Duodenum