Pathogenesis of simian varicella virus

Area of Science:

• Virology
• Immunology
• Primate Models

Background:

• Simian varicella virus (SVV) is a primate rhadinovirus closely related to human varicella-zoster virus (VZV).
• SVV naturally causes a varicella-like illness in nonhuman primates, making it an important animal model.
• Understanding SVV pathogenesis and latency is crucial for VZV research and antiviral development.

Purpose of the Study:

• To review recent studies on simian varicella virus pathogenesis and latency.
• To highlight the utility of SVV as a model for varicella-zoster virus research.
• To discuss viral dissemination, clinical manifestations, and immune responses in experimental SVV infections.

Main Methods:

• Review of experimental SVV infection studies in African green monkeys.
• Analysis of viral dissemination, pathogenesis, and host immune responses.
• Examination of viral DNA, gene transcripts, and antigen presence in infected tissues.

Main Results:

• SVV infection in African green monkeys involves a 7-10 day incubation period with viremia and characteristic skin rash.
• Severe infections can lead to pneumonia and hepatitis, with histopathology in skin, lung, liver, and spleen.
• SVV establishes latency in neural ganglia, with potential for later reactivation and transmission.

Conclusions:

• Simian varicella virus is a relevant model for studying VZV pathogenesis, latency, and antiviral strategies.
• The review details the acute and latent phases of SVV infection, including viral replication and host immune response.
• SVV's natural disease course and latency provide insights into VZV behavior and disease.