Serum biochemistry indices, leukogram, carcass variables and intestinal measurements of Eimeria tenella-infected or non-infected broilers treated with dietary Cinnamomum verum bark

Abstract

We compared the outcomes of various concentrations of Cinnamomum verum bark powder (CNP), a natural product, to a conventional anticoccidial drug in induced Eimeria tenella infection in broilers aged 21 days. On day 21, 250 birds (Ross 308) were randomly assigned to one of 10 treatments, five of which had Eimeria tenella infection and five of which did not. Results 14 days post-infection (dpi) revealed that the treatments had a significant effect on body weight gain (BWG) and production efficiency factor (PEF). Although the 2 g CNP and Salinomycin (Sacox) treatments performed equally well, the 2 g CNP had the highest BWG and PEF under challenging conditions. Although the PEF improved satisfactorily at 14 dpi, the loss of BWG at 7 dpi did not compensate at 14 dpi. Challenged birds had longer and heavier small intestines, atrophiedceca, lower creatinine levels and higher eosinophils % than unchallenged birds. The elevation lesion score and oocyst secretion of challenged birds decreased with increasing cinnamon dosage. In conclusion, 6 g CNP as a natural product could be as effective as Sacox against occidiosis, with 2 g CNP performing best at 14 dpi. However, more research is required to fully understand its anticoccidial mechanisms. HighlightsCinnamomum verum bark may benefit broiler health by reducing Eimeria tenella oocysts. Under coccidial challenge, Cinnamomum verum bark at 2 g/kg diet may improve broiler body weight gain and production efficiency at 34 days of age (14 days post-infection). The lesion score and oocyst secretion of challenged birds decreased less as cinnamon dosage was increased.