What type of infections is Posaconazole effective against?

Posaconazole is an antifungal agent that belongs to the triazole class of antifungal medications. It is primarily effective against a broad spectrum of fungal infections, particularly those caused by various species of the genera Candida and Aspergillus.

It works by inhibiting the synthesis of ergosterol, an essential component of fungal cell membranes, which leads to cell membrane disruption and ultimately fungal cell death. Posaconazole is especially noted for its activity against resistant strains of Candida and is crucial in treating invasive fungal infections, including those in immunocompromised patients.

In contrast, the other options do not accurately reflect the spectrum of activity for posaconazole. It is not effective solely against Candida infections, as it also targets Aspergillus, making that option too narrow. Additionally, posaconazole does not exert activity against bacterial or viral infections, further specifying its role as an antifungal agent. Thus, the correct option encompasses its effectiveness against both Candida and Aspergillus infections, highlighting its broad antifungal capabilities.