Marquardt et al. (2000)

Major texts state that the human symptoms of the disease Opisthorchiasis was first described in 1875. In 1884, the parasite Opisthorchis felineus was first discovered in cat liver in Northern Italy. In 1891 a Russian scientist, K. N. Vinogradov discovered this parasite in a human and named it the "Siberian liver fluke."

Opisthorchis viverrini is the only parasite that causes Opisthorchiasis in the heavily infected area of Thailand. The first case of Opisthorchiasis in Thailand was discovered in 1911 through autopsy.