{{#badges: ToxicSludge}}'''Noroviruses''' "(genus ''Norovirus'', family ''Caliciviridae'') are a group of related, single-stranded RNA, non-enveloped viruses that cause acute gastroenteritis in humans. The most common symptoms of acute gastroenteritis are diarrhea, vomiting, and stomach pain. Norovirus is the official genus name for the group of viruses previously described as “Norwalk-like viruses” (NLV)."<ref>[http://www.cdc.gov/ncidod/dvrd/revb/gastro/norovirus.htm Norovirus Home], Centers for Disease Control, Accessed June 22, 2011.</ref>
"Noroviruses spread from person to person, through contaminated food or water, and by touching contaminated surfaces. Norovirus is recognized as the leading cause of foodborne-disease outbreaks in the United States."<ref>[http://www.cdc.gov/ncidod/dvrd/revb/gastro/norovirus.htm Norovirus Home], Centers for Disease Control, Accessed June 22, 2011.</ref> In 2011, a study found that noroviruses are not sufficiently eliminated in treated [[sewage sludge]] that is used as fertilizer on food crops. <ref>Emily Gertz, [http://pubs.acs.org/cen/news/89/i25/8925scene1.html Safety Rules For Sewage Sludge May Be Outdated], Chemical & Engineering News, June 15, 2011, Accessed June 22, 2011.</ref>