| fowl cholera epornitic: antigenic characterization and virulence of selected pasteurella multocida isolates. | an epornitic of fowl cholera involving turkey flocks of several farms within a 15-mile radius in utah was studied. pasteurella multocida strains isolated from birds in affected flocks were antigenically characterized as a:1, a:3, and b:4, based on capsular sero-grouping and somatic serotyping results. experimental exposure of poults with each of two strains representing the rarely reported capsular group b indicated that both were virulent. | 1992 | 1533118 |