Examination of various symptomless tissues of citrus seedlings revealed that latent infection of anthracnose ( Collectotrichum gloeosporioides) is very common in young citrus plants. 对柑桔苗期的各种无症组织结构检查表明,柑桔苗期炭疽病潜伏侵染现象十分普遍。
Study on the Symptomless Infection of Rotavirus and Small Round Virus in Newborn Infants 新生儿轮状病毒和小圆病毒无症状感染的探讨