This study assesses the efficacy of 2 different potentiated ionophores (monensin and narasin) and a chemical (nicarbazin, a shuttle) in program with narasin to control coccidiosis in challenged male broilers through the evaluation of performance and macroscopic lesions of internal organs. A total of 4,400 broiler chicks were housed in 44 floor pens of 100 birds each; birds of the first group were fed a narasin/nicarbazin (NN)–containing diet from 0 to 27 D of age followed by narasin diet until market age, and those of group 2 were fed a monensin/nicarbazin diet followed by narasin ration for the same trial periods. The coccidia challenge was performed at day 1 by the inclusion of a proven Eimeria-infected litter in the bedding of all floor pens followed by an oral challenge using a commercial cocci vaccine at 7 D of age with a concentration of 11 times the vaccine dose. Although results showed that NN and monensin/nicarbazin treatments both demonstrated efficacy at reducing coccidian lesions, NN significantly increased BW and reduced feed conversion ratio (P < 0.05) at 27 (1,405 vs. 1284 g and 1.458 vs. 1.566, respectively) and at 33 D of age (2,178 vs. 2,026 g and 1.549 vs. 1.642, respectively). Weight and weight percentages of the ready-to-cook carcass and carcass cutup parts were significantly improved by NN. Narasin/nicarbazin inclusion in diet for 0 to 27 D followed by narasin until market weight was a successful strategy because, in addition to preventing and controlling coccidiosis, it improved performance of broiler chickens.

这项研究通过评估内部器官的性能和宏观损害，评估了两种不同的增强离子载体（莫能菌素和花生素）和一种化学物质（尼卡巴嗪，一种穿梭剂）与花生素的程序在控制雄性肉鸡中球虫病中的功效。在每只100只鸡的44层圈舍中圈养了4,400只小鸡。第一组的鸟从0至27D年龄接受了含有纳腊辛/尼卡巴嗪（NN）的饮食，随后接受纳腊辛饮食，直到上市年龄;第2组的鸟则接受了莫能菌素/尼卡巴嗪饮食，然后配以纳腊辛定量。相同的试用期。在第1天通过加入经过验证的艾美球虫进行球菌挑战感染所有地板笔的垫料，然后使用商业球菌疫苗在7 D岁时进行口服攻击，浓度为疫苗剂量的11倍。尽管结果表明NN和莫能菌素/尼卡巴嗪治疗均显示出减少球虫病的功效，但NN显着提高了体重，降低了饲料转化率（P<27岁（分别为1,405 vs. 1284 g和1.458 vs. 1.566）和33 D（2,178 vs. 2,026 g和1.549 vs. 1.642）。NN可以显着提高即煮car体和car体切碎部件的重量和重量百分比。饮食中添加0至27 D的Narasin / nicarbazin，然后再添加narasin直到市场占有率是成功的策略，因为除预防和控制球虫病外，它还改善了肉鸡的性能。