“马立克”病是家禽类一 种肝脏肿大的疾病,鸡一旦感染上这种疾病,便会死亡,衰弱或变成畸形。 科学家已开始在鸡蛋孵化前用刺穿蛋壳注射疫苗来预防。 发明这种技术的兽医学 院的医药专员查德武·M·沙马说:。对于马立克病那 些孵化前三天注射胚胎的鸡“ 只比那些刚刚孵出来才注射 Marek disease is a swollen liver disease in poultry. Once infected, the chicken will die, become weak, or become deformed. Scientists have begun to prevent eggshell piercing eggs before vaccination to prevent vaccination. Chadwuma M Shama, a medical commissioner at the Veterinary College that invented the technology, said: Those with Marek’s disease who injected embryos three days before hatching "only injected more than those newly hatched