Brefeldin A is a macrolide antibiotic that interferes with membrane traffic and blocks the growth of several animal viruses including vesicular stomatitis virus (VSV). The inhibition of VSV by brefeldin A takes place at least at two different steps during the growth cycle: the glycosylation of VSV G protein and the replication of viral genomes. Our results indicate that interference with membrane traffic leads not only to inhibition of viral protein glycosylation, but also to the blockade of virus genome replication in several cytoplasmic RNA-containing viruses.
