Health Highlights: Nov. 12, 2013

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

NASCAR Driver Trevor Bayne Has Multiple Sclerosis

Race car driver Trevor Bayne has been diagnosed with multiple sclerosis but says he will continue to race in NASCAR.

Bayne, 22, underwent extensive testing at the Mayo Clinic in Minnesota and has been cleared to race by doctors and NASCAR. He said Tuesday he isn't taking medication and doesn't expect to make any lifestyle changes, USA Today reported.

The diagnosis was made in the summer, a few weeks after Bayne won at Iowa Speedway. The Roush Fenway Racing driver had symptoms such as numbness in his arm, blurred vision, nausea and fatigue.

It was Bayne's decision to reveal his MS diagnosis, which will not affect his status with sponsors or the team, said Roush Fenway Racing president Steve Newmark, USA Today reported.

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Emergency Care Providers Have Poor Hand Hygiene: Survey

Only 13 percent of emergency medical personnel say they clean their hands before touching patients, according to a survey of nearly 1,500 emergency care providers.

It also found that only 52 percent of the respondents -- which included first responders, emergency medical providers, paramedics and doctors -- said that they wear gloves for every patient contact, CBS News reported.

Only one-third of emergency medical providers said they cleaned their hands after performing invasive procedures, according to the findings presented in October at the American College of Emergency Physicians annual meeting.

"What we found was a little concerning," Dr. Josh Bucher, a resident at Robert Wood Johnson Hospital and one of the study's authors, told CBS News.

Good hand hygiene by health care providers is crucial in reducing the risk of transmitting germs to patients, the Centers for Disease Control and Prevention says.

In the United States, about one in every 20 hospital patients develops a health care-related infection each year. Such infections can lead to death, CBS News reported.

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Women Less Likely to Have Orgasm During Casual Sex: Study

Women are less likely to have orgasms during casual sex than when they're in committed relationships, according to new research.

One study of 600 college students found that women were twice as likely to reach orgasm from intercourse or oral sex in serious relationships, compared to hookups. The findings were presented at the annual meeting of the International Academy of Sex Research and at the Annual Convention for Psychological Science this year, The New York Times reported.

Another study of 24,000 college students found that about 40 percent of women had an orgasm during their most recent casual encounter. In comparison, 75 percent of women had an orgasm the last time they had sex while in a committed relationship.

"We attribute that to practice with a partner, which yields better success at orgasm, and we also think the guys care more in a relationship," study author Paula England, a New York University sociologist, told the Times.