Eucestoda the "broad tapeworm" or "fish tapeworm") and related species. Humans become infected by eating raw, undercooked, or marinated fish acting as a second intermediate or paratenic host harboring metacestodes or plerocercoid larvae. Clinical symptoms are due to the large size of the tapeworm, which often reaches a length exceeding 15 m. The most common symptom is pernicious anemia, caused by the absorption of vitamin B12 by the worm. Other symptoms include various intestinal issues, slight leukocytosis, and eosinophilia. This condition is caused by the plerocercoid larvae of the tapeworm "Spirometra". Humans become infected by drinking contaminated water, eating raw or
An ass eating thistles in the Netherlands is suggested by the engraver Rafael I Sadeler's emblematic "Landscape with ass eating thistle". Dating from 1598/9, it is based on an earlier design by Matthijs Bril. Earlier still, the Flemish engraver Marcus Gheeraerts the Elder had been involved in illustrating a similar emblem book based on fables, "De warachtighe fabulen der dieren", 1567. Some of his designs were adapted by his son, by then a religious refugee in England, as rondels for trenchers. Included there was the picture of an ass laden with rich foods and cropping a thistle, surrounding which is the quatrain: In the