The scientists collected water and sediment samples from the interior canal and shoreline of New Orleans and the offshore waters of Lake Pontchartrain, which showed higher-than-normal levels of bacteria and pathogens. Levels of the microbes fell within a few weeks after flooding had completely subsided.
"Our findings emphasize the importance of including environmental monitoring in disaster management plans," said Helena Solo-Gabriele, an environmental engineer at the University of Miami and co-author of the study. "A rapid assessment of conditions can protect emergency workers and residents from potential illnesses that could result from exposure."
The scientists--funded by the National Science Foundation (NSF) and affiliated with the University of Miami's Rosenstiel School of Marine & Atmospheric Science (RSMAS) and other institutions--report their results in this week's issue of the Proceedings of the National Academy of Sciences. The paper, co-authored by 19 scientists and titled, "Impacts of Hurricanes Katrina and Rita on the Microbial Landscape of the New Orleans Area," provides insights into public health and human exposure to both inhaled and ingested pathogens from sewage-contaminated floodwaters induced by hurricanes.
"We know that hurricanes bring infectious disease, chemical contamination and death in their wake," said Don Rice, director of NSF's chemical oceanography program, which funded the research. "Now we are making a concerted effort to study and understand the connections."
During the hurricanes, a high volume of water flowed into cities in their paths. Residents were exposed to flood waters for a long period, say the researchers. The most contaminated area tested, near the New Orleans Superdome, contained high levels of sewage pathogens.
Scientists from RSMAS' Center for Oceans and Human Health, funded by NSF and the National Institutes of Health, along with researchers at five other universities analyzed water and sediment samples collected as the floodwaters receded from New Orleans during the 2 months after the 2005 hurricanes.
The researchers point out that monitoring efforts should focus on evaluating the impacts of sediments within an area affected by hurricane floodwaters, as exposure to contaminated sediments, by inhaling or ingesting, could result in health risks. Efforts should include monitoring pathogens in addition to indicator microbes--those that aren't themselves harmful but are known to exist alongside pathogens.
Improvements should focus, the scientists say, on reducing sewage contamination from groundwater seepage and storm water drainage in the region.
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03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
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30.03.2017 | Rochester Institute of Technology
More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.
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Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.
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The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.
Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...
The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...
Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.
Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...
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