Fewer newly diagnosed adults seek HIV care, possibly because they do not yet feel sick. Between December 2009 and February 2011, health workers with the AMPATH Consortium sought to test and counsel every adult resident in the Bunyala subcounty of Kenya for HIV. A study in the journal Lancet HIV reports that the campaign yielded more than 1,300 new positive diagnoses, but few of those new patients sought health care.

Researchers at Cold Spring Harbor Laboratory have uncovered a remarkable, new proofreading mechanism. In general, enzymatic machines are responsible for weeding out and correcting errors. Cold Spring Harbor, NY - Building a protein is a lot like a game of telephone: information is passed along from one messenger to another, creating the potential for errors every step of the way. There are separate, specialized enzymatic machines that proofread at each step, ensuring that the instructions encoded in our DNA are faithfully translated into proteins. Scientists at Cold Spring Harbor Laboratory (CSHL) have uncovered a new quality control mechanism along this path, but in a remarkable role reversal, the proofreading isn't done by an enzyme. Instead, one of the messengers itself has a built-in mechanism to prevent errors along the way.

Research by scientists and conservationists from the Wildlife Conservation Society, the Zoological Society of London, and other groups published today in PLOS ONE shows that critically endangered Saharan cheetahs exist... Research by scientists and conservationists from the Wildlife Conservation Society, the Zoological Society of London, and other groups published today in PLOS ONE shows that critically endangered Saharan cheetahs exist at incredibly low densities and require vast areas for their conservation. The research also offers some of the world's only photographs of this elusive big cat.