Yang Xiaojun, Guo Yuming, Wang Zhong, Nie Wei
Department of Animal Nutrition & Feed Science, College of Animal Science & Technology, China Agricultural University, Beijing, China.
Avian Pathol. 2006 Oct;35(5):373-8. doi: 10.1080/03079450600921149.
This study was undertaken to investigate the effects of dietary oils on coccidiosis of chickens infected with Eimeria tenella. Five hundred and four 1-day-old male Arbor Acres chicks were randomly assigned to seven groups. Seven diets were supplemented with poultry oil at 25 and 45 g/kg, corn oil at 25 and 45 g/kg, fish oil at 25 and 45 g/kg, and without oils, respectively, from 1 to 42 days of age. Chickens were inoculated by gavage with 3 x 10(5) sporulated oocysts at 21 days of age. Diets supplemented with oils at 45 g/kg resulted in higher body weight gain than with oils at 25 g/kg or without oils. The packed cell volume in chicks fed with diets supplemented with poultry oil was lower than that in chicks fed with diets supplemented with fish oil, corn oil and without oil. Chickens fed with diets supplemented with poultry oil had higher mortality than that of chickens fed with diets without oil. At 7 days post infection, the chickens consuming fish or corn oil diets had lower levels of plasma carotenoids than those fed with poultry oil supplement or without oils. Fish oil supplementation increased serum interleukin-6 levels in chickens compared with poultry oil at 25 and 45 g/kg and corn oil at 25 g/kg. Fish oil or corn oil enhanced secretory IgA levels in the lumen of the caecum, and oil supplementation tended to decrease serum IgG levels. In conclusion, the diets supplemented with saturated fatty acids aggravated mortality in chickens infected with E. tenella. The deleterious effects on coccidiosis of the diets supplemented with poultry oils might be related to the decreased levels of caecal E. tenella antigen-binding-specific secretory IgA or serum IgG.
本研究旨在调查食用油脂对感染柔嫩艾美耳球虫的鸡球虫病的影响。504只1日龄雄性艾维茵肉鸡被随机分为7组。从1日龄至42日龄，7种日粮分别添加25克/千克和45克/千克的家禽油、25克/千克和45克/千克的玉米油、25克/千克和45克/千克的鱼油，以及不添加油脂。21日龄时，给鸡经口灌服3×10⁵个孢子化卵囊。添加45克/千克油脂的日粮组鸡的体重增加高于添加25克/千克油脂组和不添加油脂组。饲喂添加家禽油日粮的雏鸡的红细胞压积低于饲喂添加鱼油、玉米油日粮和不添加油脂日粮的雏鸡。饲喂添加家禽油日粮的鸡的死亡率高于不添加油脂日粮组。感染后7天，食用鱼油或玉米油日粮的鸡的血浆类胡萝卜素水平低于饲喂添加家禽油日粮组和不添加油脂组。与添加25克/千克和45克/千克家禽油以及25克/千克玉米油相比，添加鱼油可提高鸡血清白细胞介素-6水平。鱼油或玉米油可提高盲肠腔内分泌型IgA水平，添加油脂有降低血清IgG水平的趋势。总之，添加饱和脂肪酸的日粮会加重感染柔嫩艾美耳球虫鸡的死亡率。添加家禽油日粮对球虫病的有害影响可能与盲肠中柔嫩艾美耳球虫抗原结合特异性分泌型IgA或血清IgG水平降低有关。
