Human Sexuality

💑Human Sexuality Unit 9 – Sexually Transmitted Infections

Sexually transmitted infections (STIs) are a crucial aspect of sexual health. These infections, caused by bacteria, viruses, or parasites, can be passed through sexual contact. Many STIs are asymptomatic, making regular testing essential for early detection and treatment. Common STIs include chlamydia, gonorrhea, HPV, herpes, HIV, and syphilis. Prevention strategies involve safer sex practices, vaccination, and open communication with partners. Understanding transmission, symptoms, and treatment options is vital for maintaining sexual health and reducing stigma.

What Are STIs?

  • Sexually transmitted infections (STIs) are infections passed from one person to another through sexual contact
  • STIs can be caused by bacteria, viruses, or parasites
  • Transmission occurs through vaginal, anal, or oral sex, as well as genital touching
  • Some STIs can also be transmitted through non-sexual means (sharing needles, mother-to-child during pregnancy or childbirth)
  • STIs can affect anyone regardless of age, gender, or sexual orientation
  • Many STIs are asymptomatic, meaning infected individuals may not show any signs or symptoms
  • Untreated STIs can lead to serious health complications (infertility, chronic pain, certain cancers)
  • STIs are a major global health concern with millions of new infections occurring each year

Common Types of STIs

  • Chlamydia is a bacterial infection that often presents no symptoms but can cause urethritis and pelvic inflammatory disease (PID)
  • Gonorrhea is a bacterial infection that can infect the genitals, rectum, and throat causing painful urination and discharge
  • Human Papillomavirus (HPV) is a viral infection that can cause genital warts and certain types of cancer (cervical, anal, throat)
    • HPV is the most common STI with many different strains
    • HPV vaccines are available to protect against the most high-risk strains
  • Herpes Simplex Virus (HSV) is a viral infection that causes genital or oral herpes with painful blisters or sores
  • Human Immunodeficiency Virus (HIV) is a viral infection that weakens the immune system and can lead to Acquired Immunodeficiency Syndrome (AIDS)
  • Syphilis is a bacterial infection that progresses in stages causing sores, rashes, and potentially severe complications if left untreated
  • Trichomoniasis is a parasitic infection that can cause genital irritation, painful urination, and discharge
  • Hepatitis B and C are viral infections that can be transmitted sexually and affect the liver causing inflammation and damage

Transmission and Risk Factors

  • STIs are primarily transmitted through sexual contact with an infected person
  • Risk of transmission increases with multiple sexual partners and inconsistent condom use
  • Engaging in unprotected vaginal, anal, or oral sex heightens the risk of contracting an STI
  • Having a history of STIs makes an individual more susceptible to future infections
  • Certain sexual practices (rough sex, douching, sharing sex toys) can increase the likelihood of transmission by causing micro-tears or disrupting the natural bacterial balance
  • Substance abuse, particularly intravenous drug use and sharing needles, elevates the risk of contracting STIs like HIV and Hepatitis
  • Lack of comprehensive sex education and access to healthcare services contribute to the spread of STIs
  • Biological factors (vaginal tissue is more susceptible to infection, uncircumcised penis can harbor bacteria) can influence transmission risk

Signs and Symptoms

  • Many STIs are asymptomatic, meaning they present no noticeable signs or symptoms
  • Common symptoms of STIs include painful urination, genital discharge, and abdominal pain
    • Discharge may be unusual in color, consistency, or odor
    • Pain during urination or sexual intercourse can indicate an infection
  • Genital sores, blisters, or rashes are characteristic of certain STIs (herpes, syphilis, HPV)
  • Flu-like symptoms (fever, fatigue, body aches) can occur with some STIs, particularly HIV
  • Irregular vaginal bleeding or spotting between periods may be a sign of an STI
  • Swollen lymph nodes in the groin area can indicate an infection
  • Rectal pain, discharge, or bleeding can be symptoms of STIs transmitted through anal sex
  • Itching or irritation in the genital area may be a sign of an STI (trichomoniasis, pubic lice)

Testing and Diagnosis

  • Regular STI testing is crucial for early detection and treatment, especially for individuals who are sexually active
  • Many STIs can be diagnosed through a simple urine test or swab of the affected area
  • Blood tests are used to diagnose STIs like HIV, syphilis, and hepatitis
  • Pap smears and HPV tests are important for detecting precancerous changes in the cervix caused by HPV
  • Some STIs (herpes, genital warts) can be diagnosed through a visual examination by a healthcare provider
  • It's important to inform sexual partners if an STI is diagnosed to prevent further transmission
  • Certain STIs require follow-up testing to ensure the infection has been effectively treated
  • At-home STI testing kits are available, but it's essential to follow up with a healthcare provider for confirmation and treatment

Treatment Options

  • Treatment for STIs varies depending on the specific infection and its cause (bacterial, viral, parasitic)
  • Bacterial STIs (chlamydia, gonorrhea, syphilis) are typically treated with antibiotics
    • It's crucial to complete the full course of antibiotics as prescribed, even if symptoms improve
    • Sexual partners should also be treated to prevent reinfection
  • Viral STIs (HIV, herpes, HPV) cannot be cured, but symptoms can be managed with antiviral medications
    • HIV treatment involves antiretroviral therapy (ART) to suppress the virus and prevent the progression to AIDS
    • Herpes outbreaks can be managed with antiviral drugs (acyclovir, valacyclovir) to reduce severity and frequency
  • Parasitic STIs (trichomoniasis) are treated with antiparasitic medications (metronidazole)
  • Some STIs may require additional treatments (cryotherapy for genital warts, surgery for severe PID)
  • Vaccines are available to prevent certain STIs (HPV, Hepatitis B)
  • Regular follow-up with a healthcare provider is important to monitor treatment effectiveness and potential complications

Prevention Strategies

  • Practicing safer sex is the most effective way to reduce the risk of contracting STIs
  • Using barrier methods (condoms, dental dams) consistently and correctly during sexual activity can significantly lower transmission risk
    • Condoms should be used for vaginal, anal, and oral sex
    • Dental dams should be used for oral-vaginal and oral-anal contact
  • Getting vaccinated against HPV and Hepatitis B can provide protection against these STIs
  • Limiting the number of sexual partners and engaging in mutual monogamy can decrease exposure to STIs
  • Regular STI testing, especially before engaging with new sexual partners, helps prevent the spread of infections
  • Abstaining from sexual activity is the only 100% effective method of preventing STIs
  • Communicating openly with sexual partners about STI status and testing history promotes informed decision-making
  • Avoiding sharing needles or other drug paraphernalia reduces the risk of contracting blood-borne STIs
  • Comprehensive sex education is crucial for promoting STI awareness and prevention strategies

Social and Psychological Impact

  • STIs can carry significant social stigma and shame, leading to feelings of isolation and anxiety
  • Receiving an STI diagnosis can cause emotional distress, impacting self-esteem and sexual relationships
  • Fear of judgment or rejection may prevent individuals from disclosing their STI status to sexual partners
  • The chronic nature of some STIs (HIV, herpes) can lead to ongoing psychological challenges and stress
  • Stigmatization and discrimination based on STI status can occur in social, professional, and healthcare settings
  • The financial burden of STI treatment and management can contribute to stress and anxiety
  • Coping with an STI diagnosis may require mental health support and counseling
  • Open and honest communication with sexual partners, friends, and family can help reduce feelings of isolation and shame
  • Engaging with support groups or online communities can provide a sense of connection and understanding
  • Advocating for comprehensive sex education and destigmatization of STIs can help create a more supportive social environment


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© 2024 Fiveable Inc. All rights reserved.
AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.