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Tracking Viral Parasites That Cruise Our Waterways

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Posted June 18, 2015

Humans aren’t the only ones who like to cruise along the waterways, so do viruses. For the first time, a map of fecal viruses traveling our global waterways has been created using modeling methods to aid in assessing water quality worldwide.viruses

“Many countries are at risk of serious public health hazards due to lack of basic sanitation,” said Joan Rose, Homer Nowlin Chair in water research at Michigan State University. “With this map, however, we can assess where viruses are being discharged from untreated sewage and address how disease is being spread. With that, we can design a treatment and vaccination program that can help prevent sewage-associated diseases.”

The study focused on rotavirus, a pathogen found in human sewage, which is suspected of causing more than 450,000 deaths globally each year. Rotavirus severity rates are highest among young children under two. Because the disease spreads quickly – and via water – a deeper understanding of the transmission of rotavirus is key to combatting it.rotavirus-incidence

The modeling approach used in the study was designed to better understand the global distribution of potential viruses in water sources. The model provided a grid that helped pinpoint “hotspots” where emission sources were greatest. According to Rose, those areas can now be selected for monitoring and control programs.

“The great advantage of a modeling approach is getting a better understanding of the situation in areas where no monitoring data exist, but where we do have model input available,” she said.

The study, published in the journal Pathogens, directly addresses the Sustainability Development Goals outlined by the United Nations. SDGs are being developed to extend public health goals that were not achieved by the original Millennium Development Goals set by the UN in 2000, including cutting the proportion of the global population without access to safe sanitation in half by 2015.

“Achieving the SDGs is important for reducing waterborne diseases,” Rose said. “Rotavirus epitomizes the danger of these diseases and represents the ongoing effects that sewage contamination of water has on global public health.”

Source: MSU

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