Protecting Against Sexually Transmitted Infections

Concept: HIV and AIDS

Introduction to HIV

Human Immunodeficiency Virus (HIV) is a virus that attacks the immune system, specifically targeting helper T cells. By infecting these cells and then reducing their numbers, HIV leads to AIDS (Acquired Immunodeficiency Syndrome).

• HIV impairs the body's ability to fight infections and certain cancers.

• AIDS is the advanced stage of HIV infection, characterized by severe immune deficiency and increased susceptibility to opportunistic infections.

Example: HIV attacks helper T cells, which are crucial for coordinating the immune response.

Prevalence of HIV

• Global Distribution: The highest number of new HIV infection cases occur in sub-Saharan Africa.

• Disproportionately affected populations in the U.S.:

  • African American men, especially men who have sex with men (MSM).

  • Age group: 25-35 years.

Example: Young African American MSM are at higher risk for HIV infection in the U.S.

Transmission, Symptoms, and Prevention

HIV is transmitted through specific bodily fluids, and initial symptoms may resemble the flu. Prevention strategies are essential to reduce transmission.

• Initial HIV Transmission:

  • Sexual contact

  • Blood exposure (e.g., sharing needles)

  • Mother-to-child (perinatal transmission)

• Symptoms: Early symptoms include fever, fatigue, sore throat, and muscle aches. Later symptoms may take 8-10 years to appear.

• Opportunistic Infections: As the immune system weakens, infections and certain cancers may develop.

• Prevention Methods:

  • Safe sex practices (e.g., condom use)

  • Needle exchange programs

  • Pre-exposure prophylaxis (PrEP)

  • Post-exposure prophylaxis (PEP)

Example: PrEP is a medication taken by HIV-negative individuals to reduce the risk of acquiring HIV.

Diagnosis of HIV

Early diagnosis is crucial for effective treatment and prevention of HIV transmission. Several types of diagnostic tests are available, each with different detection time frames.

Example: A healthcare worker exposed to HIV may use a NAT to detect infection within 1-4 weeks.

Treatment and Management

HIV is managed with antiretroviral therapy (ART), which helps control the virus and prevent progression to AIDS.

• ART (Antiretroviral Therapy): Involves a combination of medications that suppress HIV replication.

• Goals of Treatment:

  • Reduce viral load to undetectable levels

  • Restore and preserve immune function

  • Prevent transmission to others

  • Delay progression to AIDS

Example: ART can help people living with HIV maintain healthy lives and prevent transmission.

Key Terms and Definitions

• HIV: Human Immunodeficiency Virus, a virus that attacks the immune system.

• AIDS: Acquired Immunodeficiency Syndrome, the advanced stage of HIV infection.

• ART: Antiretroviral Therapy, treatment for HIV infection.

• PrEP: Pre-exposure prophylaxis, medication to prevent HIV infection.

• PEP: Post-exposure prophylaxis, medication taken after potential HIV exposure.

Additional info:

• HIV cannot be transmitted through casual contact such as kissing or sharing utensils.

• Consistent use of ART can reduce viral load to undetectable levels, making transmission highly unlikely.