In which stage of the HIV lifecycle does the enzyme integrase play a crucial role, and what is its function in that stage?
Assembly. Integrase packages the viral RNA into new virions.
Integration: Integrase inserts viral DNA into the host's genome.
Entry: Integrase helps the virus fuse with the host cell membrane.
Reverse Transcription: Integrase copies viral RNA into DNA.
The Correct Answer is B
A. In the assembly stage, other proteins and enzymes are involved in the packaging of viral components into new virions, not integrase.
B. During the integration stage, integrase is essential as it inserts the newly formed viral DNA into the host's genome, enabling the virus to utilize the host's cellular machinery for replication.
C. Integrase does not participate in the entry stage; this stage is facilitated by other proteins that aid in the fusion of the virus with the host cell membrane.
D. Integrase is not involved in reverse transcription; that process is facilitated by the enzyme reverse transcriptase, which converts viral RNA into DNA.
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Correct Answer is B
Explanation
A. Fluid overload is not an allergic reaction but rather a complication of transfusion related to the volume of fluid administered, thus diphenhydramine would not be appropriate.
B. Urticaria, or hives, is a common mild allergic reaction that can occur during blood transfusions. Administering diphenhydramine can help prevent or treat this response.
C. Hemolysis is a serious reaction involving the destruction of red blood cells, often due to blood type incompatibility; it is not alleviated by antihistamines.
D. Fever can occur during transfusions but is typically due to non-specific immune reactions and does not respond to diphenhydramine.
Correct Answer is D
Explanation
A. Encouraging oral intake may not be effective due to the patient's likely need for more rapid rehydration given his low blood pressure and heart rate.
B. A potassium-sparing diuretic is inappropriate in this situation, as the patient is already experiencing fluid loss and requires rehydration, not diuresis.
C. Restricting fluid intake would be contraindicated as the patient is in a state of dehydration and hypotension.
D. Administering an IV bolus of normal saline is the priority intervention to quickly restore fluid volume and improve blood pressure and hydration status.