In 1845, the first silkworm diseases began to emerge and caused an epidemic.
1845年，首批桑蚕疾病开始出现，并引起了一次流行。
According to story by Procopius, Byzantine emperor Justinian obtained the first silkworm eggs in 552 CE.
根据普罗科匹厄斯的故事，拜占庭皇帝查士丁尼在公元552年得到了首批蚕卵。
The first silkworm diseases began to appear in 1845, creating an epidemic.
1845年，首批桑蚕疾病开始出现，并引起了一次流行。
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