Virus Morphology Size and Structure

Electron micrographic studies of infected cells reveal round, oval, or pleomorphic budding particles with mean diameters of 110 to 130 nanometers. The envelopes, which have spikes, are derived from the plasma membranes of the host cell by budding. The interior contains variable numbers of electron-dense granules measuring 20 to 25 nanometers and resembling ribosomes. These sandy grains gave rise to the name Arenavirus because arena means "sand" (Rowe et al. 1970). The exact composition of this core material and its derivation are as yet uncertain. The virions are enveloped RNA-containing nucleo-capsids. The genome consists of two single-stranded RNA molecules (Lehmann-Grube 1988).

Your Heart and Nutrition

Your Heart and Nutrition

Prevention is better than a cure. Learn how to cherish your heart by taking the necessary means to keep it pumping healthily and steadily through your life.

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