Effects of yeast supplement in broiler chickens subjected to coccidial vaccination

球虫病是由艾美耳球虫引起的，被认为是世界上最重要的家禽疾病之一，因为与损失生产性能和药物有关的巨大经济损失。传统上，球虫病的管理一直是通过使用抗球虫药物。然而，公众和消费者的压力正直接指向使用抗菌生长促进剂和药物相关形式的化疗的生产实践。因此，人们对通过接种疫苗控制球虫病越来越感兴趣，因为免疫控制被认为是抗球虫药物的唯一实际替代方法。使用活疫苗的一个缺点是，它们通常是在小鸡出生后的第一周内施用的，在这一时期接种疫苗会增加疾病的风险，因为它需要长达10天的时间来刺激获得性免疫反应。孵化后的最初几天的调整是非常关键的

Coccidiosis is caused by Eimeria and is considered one of the most important poultry diseases worldwide due to the enormous economic losses associated with lost performance and medication. Traditionally, the management of coccidiosis has been through the use of anticoccidial drugs. However, public and consumer pressure is being directed against production practices using antimicrobial growth promoters and drug-related forms of chemotherapy. As a result there is a growing interest in controlling coccidiosis by vaccination because the immunological control is recognized as the only practical alternative to anticoccidial drugs. One disadvantage of using live vaccines is that they are typically administered to chicks during the first week of life and vaccination during this period increases the risk of disease because it requires up to 10 days for the stimulation of the acquired immune response. The first few days of adjustment after hatching is very crucial