Data from a national study suggests that about one in four U.S. females between the ages of 14 and 59 years may have the sexually transmitted infection human papillomarivus (HPV), according to a study in the February 28 issue of JAMA.

Doctors should encourage patients with sexually transmitted infections to tell their partners to seek treatment and, in some cases, provide home testing kits or drugs to help reduce infection rates, says a new study on bmj.com.

It's the world's most common non-viral sexually transmitted infection. There are an estimated 8 million cases of trich -- pronounced "trick" -- a year in North America and 170 million cases worldwide. But in a cover article in the January 12, 2007, issue of Science, researchers reveal many of trich's tricks.

Researchers have decoded the genetic makeup of the parasite that causes trichomoniasis, one of the most common sexually transmitted infections (STIs), revealing potential clues as to why the parasite has become increasingly drug resistant and suggesting possible pathways for new treatments, diagnostics and a potential vaccine strategy.