At Qumran, Purity Led to Parasites.

The community of Essenes at Qumran is mainly known for producing the Dead Sea Scrolls. They lived very ascetic lives and were extremely fastidious about purity and cleanliness. Recent studies indicate that the more they tried to keep things clean the dirtier they got:

"The graveyard at Qumran is the unhealthiest group that I have ever studied in over 30 years and this is readily apparent," said [paleopathologist Joe] Zias. "Two-thousand years ago in Jericho, 14 kilometers to the north, the chances of an adult male dying after 40 were 49 percent. But when you go to Qumran, the figure for people surviving to 40 falls to six percent - the chances of making to 40 differ by a factor of eight!"

Zias believes the lack of longevity puzzle could be explained by the community's latrine practices and its use of still-water pools for ritual cleansing and bathing. "Burying your feces in the outdoors makes a lot of sense until you live in Qumran," Zias explained. "By burying their fecal matter, they actually preserved the microorganisms and parasites. In the sunlight, the bacteria and parasites get zapped within a fairly short amount of time, but buried, the parasites can live in the soil for up to a year. Then people pick up things by walking through fecally contaminated soil - it's like a toxic waste dump, and if you have any cuts on your feet..."

Additionally, the community's bathing practices complicated the problem of daily exposure to contaminated soil. A cleansing pool was located at the settlement entrance on the return route from the latrine area and is likely to have been a fertile breeding ground for pathogens picked up from the human waste-enriched soil. "Here is where things really get bad," Zias explained. "After they went to the latrines they were required to enter one of the emersion cisterns before they came back into the settlement. Hygienically, that sounds like a good idea - if you have fresh running water - but there is no running water at Qumran, only runoff which was collected during the three months of winter rains. They enter the cisterns where everyone else has been, with all the bacteria they've brought in with them, floating around. The bacterium, which usually doesn't last long in the air and sunlight, stays active for a longer period in the sediments and is continually re-suspended in the water by people disturbing the pool. The water there may looked clean, but hygienically, it was rarely changed and must have been very dirty with the potentially fatal pathogens shared by everyone who was entering it for ritual purification."

Ironically, both the rigorous latrine and purification practices, combined with the lack of running water appear to be the most likely causes for the extreme differences in early mortality between Qumran and Jericho. "It is not hard to imagine how sick everyone must have been," Zias said. "As a group the men of Qumran were very unhealthy, but I think this would have been likely to have actually fed the Essenes' religious enthusiasm," Tabor added. "They would have seen their infirmities as punishment from God for their lack of purity and then have tried even harder to purify themselves further."

From Science A Go Go Via SciTech Daily

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