Plaque Formation with Influenza Viruses in Dog Kidney Cells

Plaque formation by influenza viruses in a clonal line of porcine kidney cells.

MATSUDA, S. and YAOI, H. Plaque Formation by Influenza Viruses in a Clonal Line of Porcine Kidney Cells. Tohoku J. exp. Med., 1971, 103(2), 217-219 -The plaque formation by several strains of influenza virus was investigated in a clonal cell line of procine kidney (PS, clone Y-15). Among strains tested, PR8, NWS, and Lee formed well defined plaques and showed a linear dose response relationship...

Plaque Formation and Isolation of Pure Lines with Poliomyelitis Viruses

Plaques have been produced with the three types of poliomyelitis viruses on monolayer tissue cultures of monkey kidney and monkey testis. The number of plaques was proportional to the concentration of the virus. Each plaque originates, therefore, from a single virus particle, defined as the virus unit that is unseparable by dilution. The plaques are due to the specific action of the virus since...

The Formation of Plaques by African Horse Sickness Viruses and Factors Affecting Plaque Size

Differentiation of temperature variants of influenza A2 viruses on the basis of plaque formation.

The ability of temperature variants of influenza A2 virus to produce plaques in chick embryo kidney tissue culture was studied at different temperatures. Definite differences in efficiency of plaque formation by cryophilic and thermophilic strains were observed at low and high temperatures. Differentiation of the temperature variants appears to reside in a number of genetic markers, designated ...

Plaque formation of LaSota pathogenic strain of Newcastle disease virus adapted in chick embryo fibroblast cells

In order to adapt LaSota strain of Newcastle disease virus (NDV) on chick embryo fibroblast (CEF) cells, 0.1 ml from LaSota vaccine produced in Razi vaccine and serum research institute inoculated to the CEF cells and was passaged five times in the CEF grown in Eagle’s minimum essential medium (MEM). First to third passages were blind but in fourth passage cytopathic effect of virus was observe...