Match each clinical presentation of an opportunistic infection in a patient with advanced HIV to the most appropriate initial targeted pharmacotherapy.
- Fever, headache, lethargy, elevated cerebrospinal fluid opening pressure, and positive polysaccharide antigen testIntravenous liposomal amphotericin B and oral flucytosine
- Indolent exertional dyspnea, dry cough, severe hypoxia, and bilateral diffuse interstitial infiltrates on chest imagingOral or intravenous trimethoprim-sulfamethoxazole
- Subacute focal right-sided weakness, confusion, and brain MRI showing multiple ring-enhancing lesions in the basal gangliaOral sulfadiazine, oral pyrimethamine, and oral leucovorin
- Progressive unilateral vision loss, floaters, and funduscopic examination revealing yellow-white retinal opacifications with perivascular hemorrhagesOral valganciclovir or intravenous ganciclovir
Answer
The correct pairings match Cryptococcal meningitis with liposomal amphotericin B and flucytosine; Pneumocystis jirovecii pneumonia with trimethoprim-sulfamethoxazole; Toxoplasma encephalitis with sulfadiazine, pyrimethamine, and leucovorin; and Cytomegalovirus retinitis with valganciclovir or ganciclovir.
Each specific opportunistic infection requires a targeted antimicrobial approach based on its unique biology. Cryptococcus neoformans requires fungicidal induction with liposomal amphotericin B and flucytosine. Pneumocystis jirovecii lacks standard fungal cell wall sterols and is uniquely susceptible to trimethoprim-sulfamethoxazole. Toxoplasma gondii is an intracellular parasite treated synergistically with sulfadiazine and pyrimethamine, while requiring leucovorin to rescue host bone marrow. Cytomegalovirus is a herpesvirus that requires viral DNA polymerase inhibitors like valganciclovir or ganciclovir.
Step-by-Step Solution
Key Concept
Diagnosis and targeted pharmacotherapy for major opportunistic infections in advanced HIV.