ELISA as a rapid method for detecting the correlation between the field isolates of foot and mouth disease virus and the current used vaccine strain in Egypt

Antigenic relationships between recent six serotype O field isolates of foot and mouth disease virus and the current used vaccine strain O1/3/93 can be rapidly determined using one-way liquidphase blocking sandwich ELISA. The most reliable vaccine strain to control outbreaks caused by field isolates can be rapidly identified using the described relationship "r". All virus isolates shared a closer antigenic relationship to the current used vaccine strain with "r" values ranging between 0.8 and 1. A potent vaccine containing the current used strain O1/3/93 could be the suitable vaccine to protect animals against the existing serotype O field isolates