Scientists have theorized for decades that a viral pathogen was the source of the disease, but until now, no one had been able to identify the likely culprit.
英
美
- 几十年前,科学家们就推测前胃扩张症的病源是一种病毒病原体,一直以来,还没有人能够确定可能导致这种疾病的元凶。