Determining Highest HIV Transmission Risk via Single Exposure
This solution evaluates the risk of Human Immunodeficiency Virus (HIV) transmission following a single exposure from an infected source, comparing different potential exposure routes.
Risk Analysis of HIV Transmission Routes
- Vaginal intercourse: Offers a low risk per single act. Estimated transmission risk is approximately 0.08% to 0.19% for the receptive partner.
- Vaginal delivery: Mother-to-child transmission risk during delivery (without intervention) is estimated around 15-25%. However, this is a cumulative risk related to the delivery process, not a direct single exposure event like transfusion or needle stick. Modern interventions significantly reduce this risk.
- Blood transfusion: Historically, transfusion of infected blood carried an extremely high risk, approaching 90-100% if the blood source was HIV positive and untested. While screening has drastically reduced this risk, the theoretical risk from a single transfusion of infected blood remains very high compared to other routes.
- Percutaneous needle stick injury: This occupational exposure carries a risk estimated at approximately 0.3% per injury from an infected source.
Conclusion on Highest Risk Exposure
Comparing the estimated risks for a single exposure event, blood transfusion represents the highest potential risk of HIV transmission if the transfused blood is infected. While other routes like vaginal delivery have higher cumulative risks in certain scenarios, the per-event risk associated with transfusion is generally considered the most significant single exposure risk.
Important Questions from Viral Infections
- A 'slapped cheek' rash is characteristically seen in which of the following infections?
HIV-associated neurocognitive disorder (HAND) includes which of the following?
1. Asymptomatic neurocognitive disorder
2. Minor neurocognitive disorder
3. HIV-associated dementia
Select the correct answer using the code given below.
Which of the following treatments for a pregnant lady who has been exposed to a patient of chicken pox are correct?
1. Varicella-zoster immune globulin
2. Varicella-zoster vaccine
3. Acyclovir
4. Prednisolone
Select the correct answer using the code given below.
Which of the following statements are correct regarding Kyasanur forest disease?
1. It is commonly seen in North-Eastern States of India.
2. Monkeys act as reservoir of the disease.
3. Transmission happens through tick bite.
4. Inactivated vaccine is available for its prevention.
Select the correct answer using the code given below.
- Fever with splenomegaly and lymphadenopathy can be seen in
