What type of infection is primarily treated with antivirals like Ganciclovir?

Ganciclovir is primarily used to treat infections caused by Cytomegalovirus (CMV), particularly in immunocompromised patients, such as those with AIDS or organ transplant recipients. CMV can lead to serious diseases, including CMV retinitis, which can cause blindness if not treated effectively. Ganciclovir works by inhibiting viral DNA synthesis, specifically targeting the replication of CMV and thereby helping to control the infection and reduce its associated complications.

In contrast, the other options present different viral infections. Influenza is typically treated with antiviral medications like oseltamivir and zanamivir, which target influenza viruses. Hepatitis B is commonly managed with antiviral agents such as tenofovir and entecavir, which are tailored to suppress the hepatitis B virus. HIV treatment utilizes a combination of antiretroviral therapies that include drugs from various classes to effectively manage the infection and prevent its progression to AIDS. Thus, Ganciclovir's specific action against CMV distinguishes its use from these other viral infections.