The parasitic worms are a problem that plagues residents of many countries of the world, including economically prosperous ones. The parasites not only cause intestinal problems, but can also affect the mental development of children, and in some cases can be fatal. The scientists conducted an interesting study that demonstrated that parasites were as common in medieval Europe as they are today.
And in later conditions, when there were improvements in hygiene and sanitation, it was possible to learn how to defeat parasites. A parasitologist Roger Prichard of McGill University estimates that today at least 1.5 billion people on the Earth are exposed to parasitic worms.
Basically, these are the helminths, they have been parasitizing on humans for thousands of years. They were found in the bones of the remains and feces of people who lived in the Middle Ages. They were even found in the remains of King Richard III.
The scientists took almost 600 samples of the substance from the pelvic regions of skeletons buried in cemeteries in Bohemia, Germany and the UK between about the 7th and 18th centuries. During the decomposition of the body, the remnants of the intestine settle along the surface of the pelvis.
And it was the area that preserved the eggs of ancient parasites. A DNA screening confirmed their presence. Many of the larvae of parasitic worms were completely intact. In total, the scientists found that about 25% of people during those periods were infected with the
Trichuris and about 40% with the Ascaris. These indicators were stable for a long time and did not fall even in the 18th century. They are almost entirely consistent with data on parasite infections in people living in parts of sub-Saharan Africa, Mexico, South America, East Asia and other countries.