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Cytomegalovirus disease in immunocompetent adults

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Cytomegalovirus (CMV) is an internationally ubiquitous human herpes virus with a worldwide seroprevalence ranging from 45% to 100%.1 A national serosurvey in 2006 estimated that 57% of Australians between the ages of 1 and 59 years were seropositive.2 While primary CMV infection is common in the general community, it is usually asymptomatic or causes a mild mononucleosis-like syndrome.3 The viraemic phase is generally self-limiting in healthy adults, and is followed by a lifelong bloodborne latent phase within peripheral monocytes and CD34+ myeloid progenitor cells4 (Box 1).

However, in certain circumstances CMV infection is capable of producing severe, life-threatening disease, including a wide range of potential clinical manifestations, owing to systemic haematogenous dissemination and a very broad tissue tropism6 (Box 2). Typically, severe CMV disease occurs in the context of an immature, suppressed or compromised immune system, and can lead to death or permanent major sequelae.7 As such, severe CMV infection is a well recognised cause of morbidity and mortality in neonates and immunocompromised adults, such as pharmacologically immunosuppressed transplant recipients and patients with…

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