“…Over the years, the methodologies to diagnose Eimeria in birds have been developed, not only in the traditional morphologic characterization, but also in molecular biology (Carvalho et al, 2011). Furthermore, the identification of Eimeria species can be based on morphology, geographic distribution, host species and pathology (Yang, Brice, Elloit, Lee, & Ryan, 2014). In this way, molecular tools are used for diagnostics and to describe the genetic variability of Eimeria oocysts (Carvalho et al, 2011) The sequences of the subunit I of the cytochrome c oxidase gene (COI) have been used to identify Eimeria and Isospora species in birds; however, there are still few studies of coccidia in birds worldwide (Berto et al, 2014;Hafeez et al, 2015;Ogedengbe, Hanner, & Barta, 2011;Rathinam, Gadde, & Chapman, 2015;Yang, Brice, & Ryan, 2016b).…”