What are the key differences in the management of CMV infection between immunocompetent and immunocompromised patients?

Key differences in the management of cytomegalovirus (CMV) infection between immunocompetent and immunocompromised patients primarily revolve around the necessity and intensity of antiviral therapy and monitoring strategies. In immunocompetent individuals, CMV infection is usually self-limiting and often requires only supportive care without specific antiviral treatment, as the immune system typically controls the virus effectively. Antiviral therapy is generally reserved for severe or organ-specific disease manifestations in this group.

Conversely, in immunocompromised patients—such as those with HIV/AIDS, transplant recipients, or patients on immunosuppressive therapy—CMV infection poses a significant risk of severe disease and complications. Management in these patients involves prompt initiation of antiviral agents like ganciclovir or valganciclovir to control viral replication and prevent organ damage. Additionally, regular monitoring of CMV viral load through PCR assays is critical to guide therapy duration and detect reactivation early.

Furthermore, immunocompromised patients may require prolonged antiviral prophylaxis or pre-emptive therapy based on risk stratification, which is not indicated in immunocompetent hosts. Supportive care remains important in both groups, but the threshold for intervention is much lower in immunocompromised individuals due to their impaired ability to control CMV infection.

This integrated approach aligns with UK clinical guidelines emphasizing conservative management in immunocompetent patients and aggressive antiviral treatment with vigilant monitoring in immunocompromised patients NICE CKS. Recent literature also supports these principles, highlighting the importance of tailored antiviral strategies and monitoring to improve outcomes in immunocompromised hosts Fakhreddine et al. 2019.