<unk>  is caused by<unk>  which belongs to the family Herpesviridae. Transmission of<unk>  occurs from person to person and results in activation of the immune system. Patients often present with a mononucleosis-like presentation with particularly severe complications in immunocompromised individuals and rarely in immunocompetent individuals. Reactivation can occur in response to inflammatory stimuli, physiologic stress and immunosuppressionrwhicheleasinevirions that can infect new cells causing<unk>  end organ infection.<unk>  can affect the eye, gastrointestinal tract and the central nervous system. Common complications of<unk>  in immunocompromised patients include<unk>  retinitis,<unk>  colitis,<unk>  encephalitis and<unk>  pneumonia.<unk>  is associated with increased risk of graft versus host disease, myelosuppression, and invasive bacterial and fungal infections increasing morbidity and mortality of the patients. Antiviral therapy is the primary treatment of choice. The duration of therapy and the antiviral agents are selected based on the severity of the disease, location of the disease and the level of immunosuppression of the patient. Ganciclovir and valganciclovir are the most commonly used antiviral drugs for the treatment of<unk> .
Cytomegalovirus infection
AIDS
Chlamydia infection
Adenovirus infection
Pneumococcal infections
Vaccinia
Toxocara infection
Syphilis