| a genotypic characterization of enteroviral antigenic variants isolated in eastern canada. | antigenic variation within serotypes of enteroviruses can have a significant impact on the effectiveness of routine diagnosis by neutralization assays. the focus of this particular study was to initiate a genetic characterization of echovirus type 9 (e9) antigenic variants and nontypeable strains isolated in canada from 1991 to 1993. all variant strains were initially identified by the serological parameter of neutralization 'breakthrough' during conventional serotyping using the lim-benyesh-mel ... | 1999 | 10082385 |