Title:A baromfikolera - 2. rész A baromfikolera elleni aktív védekezés vakcinázással - Irodalmi áttekintés
SUMMARY The authors review the history of fowl cholera vaccination with special regards to the Hungarian situation. They also present the currently available vaccines in Hungary. The different vaccine development efforts and the difficulties of virulence reduction without loosing the efficacy are discussed. Knowing the role of individual genes in protectivity helps to develop subunit vaccines with DNA or protein component, but heterogeneity of the bacterium and serotype specific protection connote difficulties of broad range application and host specificity.