Adding a new HIV screening method, called nucleic acid amplification testing (NAAT), to standard HIV testing, researchers were able to uncover six percent more cases of HIV infection in urban STD and drug treatment clinics and HIV testing sites in Atlanta than with standard HIV antibody tests alone. The research will be presented at the 12th Conference on Retroviruses and Opportunistic Infections in Boston on February 25, 2005 by Frances Priddy, MD, assistant professor of medicine at Emory University School of Medicine.
Physician/researchers at Emory, the University of North Carolina at Chapel Hill and the Georgia Department of Human Resources used NAAT to screen clients receiving routing HIV testing and counseling at the urban clinics between October 2002 and January 2004. The research team used both standard antibody testing and NAAT testing to screen specimens from 2,202 people who had not previously tested positive for HIV. Sixty-six of the specimens were found to be HIV antibody positive and 2,135 were HIV antibody negative using standard tests. Using NAAT, however, four of the antibody-negative specimens tested positive for HIV viral genes.
On further examination, three of those four individuals were found to have definite acute HIV infections, although only one showed clinical symptoms. One of the four individuals had unclear results and may have had either acute or chronic HIV. In addition, three of the four individuals had HIV viruses with multidrug resistance. The fourth sample was unable to be tested for resistance.
Holly Korschun | EurekAlert!
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Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
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Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
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An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
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A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
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