Immunology

Researchers identify enzyme linked to colitis

An enzyme that usually stops bacterial growth in the large intestine stimulates inflammation in some people, resulting in ulcerative colitis—a chronic digestive disease that affects more than 750,000 Americans, according ...

Medical research

Intestinal microbes may speed progression from HIV to AIDS

The advent of antiretroviral therapy—a combination of medications used to slow the progression of HIV—has allowed many people infected with the virus to live long, productive lives. But the therapy doesn't cure them, ...

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