Physical Factors That Affect In Vitro Autographa californica Nuclear Polyhedrosis Virus Infection

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RESUMO

Of the physical parameters tested for in vitro baculovirus infection, multiplicity of infection was most important in governing percent cell infection. Most plaques formed within the first 5 min of incubation. Efficiency of infection, however, was low, and the virus titer did not diminish during prolonged incubation. Efficiency of infection improved markedly when cells or virus were preincubated with selected polyanions and polycations. Precise regulation of the pH, osmotic pressure, and ionic composition of the cell culture medium also promoted maximum in vivo infection.

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