Effects of dietary essential oil supplementation on Eimeria challenged broilers:Intestinal morphology,inflammation levels,and cecal microbiota
This experiment aimed to utilize essential oils to alleviate intestinal damage and balance microbial disturbed by Eime-ria infection.Effects of dietary essential oil supplementation and Eimeria infection on intestine indexes,morphology,inflamma-tion levels,and microbial diversity and composition were investigated.Eight treatments were arranged in 4(a control diet,an an-ticoccidial drug diet,a clove oil diet,and an oregano oil diet)× 2(Eimeria oocysts challenge vs none challenge)factorial de-sign.The Eimeria infection increased relative weights of jejunum,ileum,and Ruminococcus torque relative abundance,and de-creased jejunal villus height to crypt ratio and Clostridia vadin BB60 relative abundance at 28 d of age(P＜0.050).Dietary supplementation of the anticoccidial drug,oregano oil,or clove oil reduced jejunal lesions and Lachnoclostridium relative abun-dance(P＜0.050).The oregano oil supplementation increased duodenal villus height,ileal villus height to crypt depth ratio,and reduced jejunal length(P＜0.050).The clove oil supplementation increased duodenal villus height,ileal villus height to crypt depth ratio,Blautia relative abundance,and reduced duodenal length and Shannon diversity(P＜0.050).Taken together,the Eimeria infection caused intestine morphological disruption.The dietary inclusion of oregano or clove essential oils could im-prove the intestinal health of those Eimeria-infected boilers by attenuating intestinal lesions and increasing the colonization of beneficial microbes.
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