The pathogen of Chronic Respiratory Disease(CRD) is Mycoplasma Gallisepticum(MG). The MG exists widely in chicken. So it usually brings considerable economic lose to the fowl aquaculture .

  • 鸡毒支原体(Mycoplasma Gallisepticum,MG)感染,也称为鸡败血霉形体感染或慢性呼吸道病(Chronic Respiratory Disease,CRD),因其在鸡群中广泛存在而造成很大的经济损失。
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