HIV is a retrovirus that attacks the immune system, specifically the CD4 cells (T cells), which play a crucial role in the body’s defense mechanism. The virus can lead to the progressive failure of the immune system and, if untreated, can result in acquired immunodeficiency syndrome (AIDS).
Etiopathogenesis
1. Transmission: HIV is primarily transmitted through unprotected sexual intercourse, sharing of needles among drug users, and from mother to child during childbirth or breastfeeding.
2. Viral Replication: The virus enters CD4 cells, replicates, and releases new viruses, leading to a decline in CD4 cell count.
3. Immune System Impairment: As the virus replicates, it destroys CD4 cells, compromising the immune system’s ability to fight infections and diseases.
Clinical Manifestations
1. Acute HIV Infection: Fever, fatigue, rash, headache, sore throat, swollen lymph nodes.
2. Clinical Latency Stage: Asymptomatic or mild symptoms persist for years.
3. Advanced HIV/AIDS: Opportunistic infections (e.g., tuberculosis, pneumonia), weight loss, chronic diarrhea, neurological symptoms, and various cancers.
Diagnostic Evaluation
1. HIV Antibody Test: Detects antibodies produced in response to the virus.
2. CD4 Cell Count: Measures the number of CD4 cells to assess immune system health.
3. Viral Load Test: Quantifies the amount of HIV RNA in the blood to monitor viral replication.
Non-pharmacological Management
1. Preventive Measures: Safe sex practices, use of clean needles, pre-exposure prophylaxis (PrEP) for high-risk individuals.
2. Behavioral Changes: Education on risk reduction, avoiding substance abuse.
3. Supportive Care: Mental health support, nutritional counseling, and addressing lifestyle factors.
Pharmacological Management
1. Antiretroviral Therapy (ART): A combination of antiretroviral drugs to suppress viral replication, maintain immune function, and prevent progression to AIDS.
2. Pre-exposure Prophylaxis (PrEP): Daily medication for individuals at high risk of HIV to prevent infection.
3. Post-exposure Prophylaxis (PEP): Emergency medication after potential exposure to prevent HIV transmission.
4. Treatment of Opportunistic Infections: Management of infections or conditions that may arise due to a weakened immune system.
Follow-up and Prognosis
1. Regular Monitoring: CD4 cell count and viral load monitoring to assess treatment effectiveness.
2. Adherence to Medications: Consistent use of antiretroviral drugs is crucial for viral suppression.
3. Lifestyle Considerations: Healthy lifestyle choices, including a balanced diet, exercise, and stress management.
4. Prognosis: With effective ART, HIV can be a manageable chronic condition, significantly extending life expectancy and improving quality of life.
In conclusion, HIV is a complex viral infection with profound implications for the immune system. Early detection, adherence to antiretroviral therapy, and preventive measures are key components of managing HIV, offering individuals the opportunity to lead fulfilling lives while effectively controlling the progression of the disease.
