LIVING AT OB RIVER
LIVING AT OB RIVER
CAT LIVER FLUKE INFECTIONS IN SIBERIA’S WEST
H
er luggage got stuck in Moscow, but she made it as far as Basel, Olga Fedorova, medical professor at the Siberian State Medical University in Siberia. The scientist visits Swiss TPH to report on a topic that has been omnipresent to her since her early childhood: the widespread infection with the cat liver fluke Opisthorchis felineus in Western Siberia. Especially in the Tyumenskaya Oblast, Tomsk Oblast region, where the great Ob River branches into its numerous tributaries, many people are affected by the disease. “The river is more than a river. It determines the life and culture of the whole region,” says Fedorova. Many people practise fishing. Insufficiently cooked fish is traditionally high on the menu.
body of a freshwater snail in the river, and infected a carp. This carp is now the somewhat questionable object of desire (“fishy”, as the Brit would say), which lands undercooked and only slightly salted or smoked on the plate. The fact that people do not renounce this carp also has something to do with the fact that a cat liver fluke infection can go unnoticed for a long time before the symptoms become apparent: Inflammation of the bile duct, gallstones or jaundice. Researchers also suspect a link between O. felineus and a fatal bile duct cancer. However, it has not yet been scientifically proven.
CONTAMINATED CARP
Olga Fedorova’s carrying voice can still be heard in the back row of chairs. The professor stresses that mass treatment with the drug Praziquantel is not the ideal solution to the problem. Rather, to establish preventive programs one needs to precisely study the needs and experiences of local people with social science studies. The latest results show: Many people in Siberia have accepted this helminth infection as a normal part of their life on the river. They regard
The lecture hall is already full when Olga Fedorova takes the floor. She clears her throat and moves her hand through her hair, which is combed backwards. In her home region, the risk of being infected with O. felineus is considerable, she says. Before the parasite enters the human liver, gall bladder and bile ducts, it had already been housed in the
EVERYBODY HAS IT!
65
