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Updated: Aug 15, 2026

Use of In vivo Imaging to Monitor the Progression of Experimental Mouse Cytomegalovirus Infection in Neonates
Published on: July 6, 2013
Epidemiology and pathogenesis of cytomegalovirus disease
1Department of Virology and Infectious Diseases, City of Hope National Medical Center, Durate, CA 91010.
Abstract:
Two distinct processes contribute to the spectrum of human cytomegalovirus (HCMV)-induced pathology. In the first instance, cytopathic effects appear to occur as a direct result of virus replication. This type of disease is characterized by persistent HCMV infection of neural or gastrointestinal tissue, which results in HCMV retinitis, encephalitis, hepatitis, or gastroenteritis. Direct cytopathic effects of HCMV are associated with congenitally acquired or acquired immune deficiency syndrome-related manifestations of HCMV infection. A second type of HCMV-associated disease process is driven by immunopathologic mechanisms and results in variable mononucleosis-like syndromes and/or pneumonia in normal or partially immunosuppressed individuals. Human cytomegalovirus-associated interstitial pneumonia appears to derive from a combination of these two types of disease processes. Here, persistent viral infection, immunopathologic mechanisms, and virus-induced expression or repression of cellular genes each constitutes an important factor in pathogenesis. An understanding of the multiple underlying mechanisms of pathogenesis is crucial to devising optimum treatment approaches.
Insights
Human cytomegalovirus (HCMV) causes disease through direct viral damage and immune responses. Understanding these distinct pathological processes is key to developing effective HCMV treatments.
Area of Science:
- Virology
- Immunology
- Pathology
Background:
- Human cytomegalovirus (HCMV) infection can manifest in various ways.
- Pathology arises from direct viral replication or immunopathologic mechanisms.
Purpose of the Study:
- To elucidate the distinct pathogenic mechanisms of HCMV.
- To understand the combined factors in HCMV-associated interstitial pneumonia.
Main Methods:
- The study reviews existing literature on HCMV pathogenesis.
- It analyzes the roles of viral replication, immune responses, and gene regulation.
Main Results:
- HCMV pathology results from direct cytopathic effects (viral replication) or immunopathology.
- Direct effects cause retinitis, encephalitis, hepatitis, and gastroenteritis, especially in immunocompromised individuals.
- Immunopathology leads to mononucleosis-like illness and pneumonia in various immune states.
Conclusions:
- HCMV-associated interstitial pneumonia involves both direct viral damage and immune-mediated processes.
- Persistent infection, immunopathologic mechanisms, and altered gene expression are critical factors.
- A comprehensive understanding of these mechanisms is essential for optimal treatment strategies.
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