Properties of Bordetella bronchiseptica in pig units Biological proper
ties of Bordetella bronchiseptica strains isolated from the air of far
rowing and weaning pig units have been investigated. Because of phase
growth, hemagglutination, K-factors and HLT-formation ability isolated
strains are supposed to be highly virulent. The infectious load of in
vestigated units is characterized by these pathogens.