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Spiroplasmal viruses: group 1 characteristics

A Liss, R M Cole

    Reviews of Infectious Diseases
    |May 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Spiroplasma virus 1 (SpV1) particles were found in most spiroplasma strains. These viruses share many properties but show differences in host range and plaque formation, indicating distinct biological characteristics.

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    Area of Science:

    • Microbiology
    • Virology
    • Molecular Biology

    Background:

    • Spiroplasma are wall-less bacteria with diverse hosts.
    • Virus-like particles (VLPs) are frequently observed in spiroplasma cultures.
    • Three morphologic groups of VLPs have been previously identified.

    Purpose of the Study:

    • To characterize Spiroplasma virus 1 (SpV1) isolates from various spiroplasma strains.
    • To investigate the physicochemical and biological properties of SpV1.
    • To determine if SpV1 isolates share common characteristics or exhibit strain-specific differences.

    Main Methods:

    • Electron microscopy for VLP morphology and size determination.
    • Isolation and plaque assay for virus quantification and host range determination.

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  • Analysis of DNA content, buoyant density, growth curves, and inactivation kinetics.

    • Main Results:

    • SpV1, rod-shaped VLPs (230-280 nm x 10-15 nm), were detected in 575 spiroplasma strains.
    • SpV1 occurred spontaneously and in high numbers in specific spiroplasma strains.
    • All SpV1 isolates shared identical morphology, size, DNA content, and physicochemical properties, but differed in host range and plaque formation.

    Conclusions:

    • SpV1 isolates exhibit conserved physicochemical properties across diverse spiroplasma hosts.
    • Despite shared characteristics, SpV1 isolates display variations in biological behavior, particularly in host interactions.
    • These findings suggest a complex relationship between SpV1 and its spiroplasma hosts.