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Understanding Vaginal Yeast Infections -- the Basics

Understanding Vaginal Yeast Infections -- the Basics

Vaginal yeast infections are very common.  Approximately 75% of women will have a vaginal yeast infection at least once in their lifetime.  Yeast infections, sometimes called candidiasis, develop where a moist environment encourages fungal growth, such as the genitals.

 

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What Causes a Vaginal Yeast Infection?

Candida albicans causes 80% to 90% of vaginal yeast infections. This fungal organism, or yeast, thrives in the gastrointestinal tract, mucous membranes (vagina, mouth, nose), and skin. Normally, your body produces bacteria that keep Candida in check. But when fungal growth exceeds the body's ability to control it, a vaginal yeast infection can occur. This can happen when you're weakened by illness or upset by stress. A yeast infection is not a sexually transmitted disease.

Your chance of developing a vaginal yeast infection is increased if you take antibiotics or use hormone contraceptives containing estrogen and possibly, contraceptive diaphragms, intrauterine devices, and sponges. Women who are pregnant, have diabetes, or who have weak immune systems also are at higher risk of vaginal yeast infections. 

About 10% to %20 percent of yeast infections is caused by nonalbicans Candida and is often resistant to the usual treatment options. 

 

WebMD Medical Reference

Reviewed by Nivin Todd, MD, FACOG on April 26, 2012

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