Acute retroviral syndrome.

PURPOSE OF REVIEW: To review the most important recent literature on the definition, epidemiology, clinical presentation, pathogenesis and treatment of the acute retroviral syndrome (ARS), a constellation of nonspecific symptoms and transient illness occuring in at least 50% of persons shortly after HIV acquisition. ARS is driven by initial rapid HIV viral replication and dissemination after acquisition, followed by immune activation and massive systemic inflammation. A more detailed understanding of ARS is important for the implementation of early detection efforts, treatment and public health strategies to control HIV.

RECENT FINDINGS: Recent research has provided deeper insights into ARS. Key findings include associations of ARS with heightened immune activation and elevated levels of IFNγ and multiple other cytokines, particularly IP-10, as well as with higher viral load and more severe CD4 + depletion during acute infection. These negative impacts can be mitigated by early antiretroviral therapy initiation and long-term outcomes are generally similar in treated individals with or without ARS.

SUMMARY: Current findings underscore the importance of early detection and intervention in ARS to mitigate long-term health impacts and inform the development of targeted therapeutic strategies.