luster and genotypes analysis of RAPD-PCR fingerprints of 5 strains of B. abortus isolated in Egypt along with the reference strain 544. Band profiles of each strain are corresponding with the lines of the dendrogram. Two major clusters 1 and 2 (similarity ~ 78%) are demarcated. The RAPD genotypes, clusters, Brucella species, and strain serial numbers are represented in the columns.