Add penis bacteria to the list of HIV risk factors
Microbes that thrive in oxygen-poor places may lure virus’s prey: vulnerable immune cells
![Prevotella](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/07/072517_LH_HIV_main.jpg?fit=860%2C460&ssl=1)
BAD BACTERIA Bacteria such as Prevotella (shown) are anaerobes — they can survive without oxygen. An increase in anaerobic bacteria on the penis raises the risk of HIV infection, a new study suggests.
Dennis Kunkel Microscopy/Science Source