Abstract
The present study was aimed at comparing specificities and cross-reactivities of immune mouse sera obtained from mice infected with a low (2 x 10(2) or 20 immunological infectious focus units (ifu) or high (2 x 10(6) ifu) dose of various strains of lymphocytic choriomeningitis virus (LCMV). Neutralization titres of the various antisera were determined by an infectious focus reduction assay. This assay was performed on MC57G and on Vero E6 cells using the commonly utilized laboratory strains of LCMV WE, Docile, Armstrong, Armstrong Clone 13, Pasteur, Traub and Aggressive. Experiments with immune sera revealed broad cross-neutralization, demonstrating a variable but close serological relationship between the various strains of LCMV.
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