It has been shown that this parasite feeds upon the blood, not the bile of its host, though it occurs mainly in the bile ducts.
In biliary atresia, the bile ducts are actually absent, also causing jaundice.
It should be avoided by people with chronic heartburn, severe liver damage, inflammation of the gallbladder, or obstruction of bile ducts.
When the bile ducts can get swollen the bile cannot get to the gall bladder.
The tiny bile ducts in that part of the liver where the surgery is performed discharge their bile directly into the intestine, and the channels will gradually enlarge.