Water-Borne Illness

Genetic diversity of noroviruses in sewage water examined

Published in Medical Letter on the CDC and FDA, July 24th, 2005

Researchers have examined the genetic diversity of noroviruses in raw and treated sewage water.

According to a study from the Netherlands, "Human noroviruses cause gastroenteritis in humans, leading to high virus loads in sewage. Norovirus concentrations in raw and treated sewage samples from two sewage treatment plants (STP) were studied, along with virus removal and genetic diversity.

"Over 1 year, the average norovirus concentrations in raw sewage were approximately 10⁵ per detectable units (pdu) per liter compared with 10³ pdu/L of treated sewage. Similar sewage treatment processes at STP-A and STP-B led to 2.7 and 2.0...

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Source: Medical Letter on the CDC and FDA (2005-07-24)

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