Morphology and adsorption of a globular virus, lysing Acholeplasma laidlawii were studied in ultrathin sections of plaques in a lawn of the host strain. The virus was globular, about 50 to 90 nm in diameter, with a clearly defined membrane, 6.5 to 8 nm thick. A protuberance about 25 to 35 nm long and 12 to 20 nm thick was observed on numerous virus particles. The evenly granulated, electron-optically dense content of the cells became clearer in cells affected by the viruses. Fibrillar structures of different thickness and small dense areas appeared in cells assumed to be in the preliminary stages of lysis. The interactions in the virus-host system and possible development stages of the virsu are discussed.

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Mycoplasma-virus contacts, budding and scars remaining in the membranes of Acholeplasma laidlawii and its virus

Membrane structures of Acholeplasma laidlawii and its virus

Electron-microscopic study of a Mycoplasmatales virus, strain MV-Lg-pS2-L 172