柔嫩艾美耳球虫感染对黄羽肉鸡生产性能、免疫器官和肠道形态的影响

doi:10.16431/j.cnki.1671-7236.2025.03.028

Abstract

Abstract: 【Objective】 This study was aimed to investigate the effects of Eimeria tenella (E.tenella) infection on production performance,immune organs as well as cecum morphology and structure of Yellow-feathered broilers.【Method】 Seven half-sibling genealogies of Yellow-feathered broilers were screened for resistant and susceptible lines according to the coccidia susceptibility index after E.tenella infection to form resistant and susceptible groups,which were compared and analysed for differences in production performance,immune organs and intestinal morphology and structure between the different groups during the infected period and the recovery period,respectively.【Result】 The results showed that the average weight and daily gain of chickens in resistant and susceptible groups were extremely significantly lower than those of control group during E.tenella infection period and recovery period (P＜0.01),and the F/G was both extremely significantly higher than that in control group (P<0.01). Seven immune and intestinal organ indices of chickens,including thymus and spleen and so on,had no significantly different among resistant,susceptible and control groups at different periods of infection (P＞0.05),but the immune organ indices were higher in the recovery period than those in the infection period.In addition,pathological changes such as necrosis of cecum mucosa,incomplete and broken muscle layer were observed in chickens in both resistant and susceptible groups during the infection period,and coccidian gametes could be seen in the epithelium of cecum of chickens in susceptible group,while resistant group’s tissue structure of cecum of chickens gradually recovered to normal during the recovery period,all layers of cecal tissue of chickens in susceptible group were still showing significant degeneration or necrosis.【Conclusion】 Both resistant and susceptible chickens showed reduced performance and altered intestinal morphology after infection with E.tenella,regardless of whether they were infected or recovered,but during the recovery period,resistant chickens were able to gradually return to a healthy state,whereas susceptible chickens showed irreversible damage to cecum.The results of the study provided a reference for delve into the effects of E.tenella infection on the production performance and intestinal tract of chickens in infection period and recovery period.

Key words: Eimeria tenella; Yellow-feathered broilers; resistance; production performance; intestinal morphology

CLC Number:

S855.9⁺1

DONG Liyue, FAN Zuokun, TANG Meihui, TANG Jianqiang, YU Hailiang, ZHANG Tao, ZHANG Genxi, XIE Kaizhou, ZHAO Zhenhua, DAI Guojun. Effect of Eimeria tenella on Growth Performance,Immune Organs and Intestinal Morphology of Yellow-feathered Broilers[J]. China Animal Husbandry and Veterinary Medicine, 2025, 52(3): 1263-1271.

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Effect of Eimeria tenella on Growth Performance,Immune Organs and Intestinal Morphology of Yellow-feathered Broilers

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