Biological and biophysical characteristics of mouse adenovirus, strain FL

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Abstract
Mouse adenovirus, strain FL (MAV), is best propagated in primary rather than secondary cultures of mouse kidney cells. Virus release from the cells into the medium is fairly efficient; the average yield per cell is about 1000 TCID50. Morphological and other biophysical characteristics are those of a typical adenovirus: the icosahedral shell with a diameter of 74 nm, fiber projections of 29 nm length, its localization inside the infected kidney cells, a buoyant density in CsCl of 1.34 g/ml, inhibition of multiplication by inhibitors of DNA synthesis. The thermostability is higher than that of human adenoviruses, whereas, in contrast to these, MAV is inactivated to a great extent by trypsin. Complete or incomplete hemagglutinin or toxin-like activity were not detected. The virus shows no cross-neutralization with human adenoviruses and a one-sided cross-reaction with another murine adenovirus strain K87. Soluble complement-fixing antigen of MAV exhibits a sedimentation rate of 12S identical to the hexon component of human adenoviruses; both antigens show a partial antigenic relationship in tests with appropriate antisera.

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