The American Social Health Association provides accurate, medically reliable information about sexually transmitted diseases (STDs) to the public, patients, providers, and policy makers. Its Web site has resources to answer your questions as well as to help you find referrals, join help groups, and get access to in-depth information about STDs. You can also get information over the phone by calling 1-800-227-8922.

The CDC Web site provides a fact sheet for consumers on Trichomonas infection.

The National Center for HIV, STD, and TB Prevention is a branch of the U.S. Centers for Disease Control and Prevention (CDC). Their Web site provides information and updates on sexually transmitted diseases (STDs), human immunodeficiency virus (HIV), and tuberculosis (TB). You can also find fact sheets on these health topics.

The National Women's Health Information Center (NWHIC) is a service of the U.S. Department of Health and Human Services Office on Women's Health. NWHIC provides women's health information to a variety of audiences, including consumers, health professionals, and researchers.

The Planned Parenthood Federation of American provides comprehensive reproductive health care and consumer information about family planning, sexual health, and sexually transmitted diseases (STDs).