The virus that causes AIDS may undergo changes in the genital tract rendering HIV-1 in semen different than HIV-1 in the blood, according to researchers from the University of North Carolina at Chapel Hill, the Edward Jenner Institute for Vaccine Research (United Kingdom), and the Baylor Pediatric Center of Excellence (Malawi). The research, published August 19 in the open-access journal PLoS Pathogens, advances our understanding of HIV-1 replication in the male genital tract.

U.S. Department of Agriculture (USDA) scientists have developed a new tool for improving the expression of desirable genes in rice in parts of the plant where the results will do the most good.