Cluster and genotypes analysis of ERIC-PCR fingerprints of 24 field strains of B. melitensis isolated in Egypt along with the reference strain Ether. Band profiles of each strain are corresponding with the lines of the dendrogram. Three major clusters 1 and 2 (similarity ~ 62%) are demarcated. The ERIC genotypes, clusters, Brucella species, and strain serial numbers are represented in the columns.