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