What type of pathogen does ganciclovir primarily target?

Ganciclovir is an antiviral medication specifically designed to combat viral infections, predominantly those caused by the cytomegalovirus (CMV). This drug is a synthetic analog of guanosine and works by inhibiting viral DNA synthesis, thereby interfering with the replication of viruses. As a result, ganciclovir is used primarily in immunocompromised patients, such as those with HIV/AIDS or organ transplant recipients, to prevent or treat CMV infections.

It is important to note that ganciclovir has no effect on bacterial, fungal, or parasitic infections, which are treated with other classes of antimicrobial agents. The exclusive targeting of viruses makes ganciclovir an essential medication in antiviral therapy.