Wound healing events in mucous tissues during early infection by Simian Immunodeficiency Virus, or SIV, guard some primate species against developing AIDS, a recent study has learned. The research looked at why certain species can carry the virus throughout their lives, and still avoid disease progression.

SIV is closely related to the Human Immunodeficiency Virus. It is used as a laboratory model for many studies seeking AIDS and HIV cures and preventions.

Globally, 25 percent of new HIV cases occur among young women and adolescent girls in Africa. Pre-exposure prophylaxis, or PrEP, prevents infection when taken consistently, but stigma around the disease keeps some young women from maintaining usage, according to a new review by researchers at the University of Washington.

It is hard to get much of a reputation if nobody knows you’re around, and that has definitely been the case for mycoplasma genitalium, the tiny bacteria estimated to be more prevalent than the bug that causes gonorrhea but is almost completely off the public’s radar.

That’s because, until very recently, it has been difficult for front-line physicians to confirm that this particular microbe — the smallest bacteria ever detected — was present in specific patients.

In a study of open-label Truvada as daily pre-exposure prophylaxis (PrEP) to prevent HIV among 427 young African women and adolescent girls, 95% initiated the HIV prevention strategy, and most used PrEP for the first three months. However, PrEP use fell among participants in this critical population during a year of follow-up clinic visits, although HIV incidence at 12 months was low. The preliminary results suggest that tailored, evidence-based adherence support strategies may be needed to durably engage young African women in consistent PrEP use.