http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. A new University of Georgia study suggests that health agencies investigating Salmonella illnesses should consider untreated surface water as a possible source of contamination. http://www.physorg.com/news154955667.html Biology Fri, 27 Feb 2009 11:15:08 EST news154955667 One of the major challenges in modern vaccinology is to engineer vectors that are highly infectious, yet don't cause illness. Trickier still is to ensure that such weapons against infectious disease can be safely disarmed, once their immunogenic work is done. Roy Curtiss, an investigator of vaccines and infectious diseases at Arizona State University's Biodesign Institute, has pursued these goals for 30 years. http://www.physorg.com/news151003976.html Medicine & Health Mon, 12 Jan 2009 17:32:56 EST news151003976