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Study of mumps virus invasiveness in monkeys
Abstract:
Invasiveness of mumps virus strains, differing in the degree of attenuation was studied in green and Macaca mulatta monkeys infected either into salivary glands or intramuscularly. Peripheral infection with all strains under study resulted in their penetration into CNS irrespective of the attenuation degree. Specific morphological changes were observed in the brain of monkeys as confirmed by detection of virus antigen using fluorescent antibodies (FA) staining. Morphological changes and time of virus antigen detection in the brain differed depending on the neurovirulence of the strains based on different degree of their attenuation.
Insights
Mumps virus can invade the central nervous system (CNS) regardless of its attenuation level. Brain changes and virus detection varied based on mumps strain neurovirulence.
Area of Science:
- Virology
- Neuroscience
- Immunology
Background:
- Mumps virus strains exhibit varying degrees of attenuation.
- Understanding the neuroinvasive potential of mumps virus is crucial for public health.
- Previous studies have not fully elucidated the relationship between mumps virus attenuation and central nervous system (CNS) invasion.
Purpose of the Study:
- To investigate the invasiveness of differently attenuated mumps virus strains in non-human primates.
- To determine if peripheral infection with mumps virus leads to CNS penetration.
- To correlate neurovirulence with observed morphological changes and viral antigen presence in the brain.
Main Methods:
- Infection of green monkeys and Macaca mulatta with mumps virus strains via salivary glands or intramuscularly.
- Detection of viral antigen in brain tissue using fluorescent antibody (FA) staining.
- Histopathological examination of brain tissue for morphological changes.
Main Results:
- All studied mumps virus strains, regardless of attenuation, penetrated the CNS following peripheral infection.
- Specific morphological alterations were identified in the brains of infected monkeys.
- The timing of virus antigen detection and the nature of morphological changes in the brain varied according to the neurovirulence of the mumps strains.
Conclusions:
- Peripheral mumps virus infection can lead to CNS invasion irrespective of the virus's attenuation degree.
- Neurovirulence of mumps virus strains directly influences the observed neuropathological changes and viral dissemination kinetics within the CNS.
- These findings highlight the importance of considering strain-specific neurovirulence in understanding mumps-associated neurological complications.