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Reptilian viruses: adenovirus-like agent isolated from royal python (Python regius).

M Ogawa1, W Ahne, S Essbauer

  • 1Institute of Zoology and Hydrobiology, University of Munich, Germany.

Zentralblatt Fur Veterinarmedizin. Reihe B. Journal of Veterinary Medicine. Series B
|December 1, 1992
PubMed
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A novel adenovirus-like virus was isolated from a royal python. This DNA virus replicated in cells, forming inclusion bodies and hexagonal particles, sharing traits with Adenoviridae family viruses.

Area of Science:

  • Herpetological virology
  • Molecular biology
  • Comparative pathology

Background:

  • Emerging infectious diseases in reptiles pose significant threats to wildlife and captive populations.
  • Understanding viral agents affecting reptiles is crucial for conservation and veterinary medicine.
  • Royal pythons (Python regius) are popular exotic pets, making them susceptible to novel pathogens.

Purpose of the Study:

  • To isolate and characterize a viral agent from a moribund royal python.
  • To determine the biological and physical properties of the isolated virus.
  • To compare the novel virus with known viral families.

Main Methods:

  • Isolation of a viral agent from affected royal python tissues.
  • Replication studies in IgH2 cell lines at 30°C.

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  • Assessment of viral stability under various conditions (chloroform, pH 3, pH 12, heat at 56°C).
  • Electron microscopy to determine virion morphology and size.

    • Main Results:

    • An adenovirus-like agent was successfully isolated from the royal python.
    • The virus replicated in IgH2 cells, inducing eosinophilic intranuclear inclusion bodies.
    • The virus demonstrated stability to chloroform, pH 3, and pH 12, but was heat-labile at 56°C.
    • Electron microscopy revealed hexagonal virus particles (67-79 nm) within the nucleus of infected cells.

    Conclusions:

    • The isolated virus shares characteristics with viruses in the Adenoviridae family.
    • This finding represents a potential novel adenovirus affecting royal pythons.
    • Further research is needed to fully classify this reptilian adenovirus and assess its pathogenicity.