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Genetics 2002, 161:1307–1320.PubMed Authors’ contributions EN obtained the sequence data, compiled alignments and participated in the study design, phylogenetic inference, interpretation of the results, and preparation of the manuscript. VH conceived of the study and participated in conduction of the phylogenetic inference. Both, VH and NAM participated in the study design, evolutionary interpretation of the results and preparation of the manuscript. All authors read and approved the final manuscript.”
“Background Brucellae are Gram-negative, facultative, intracellular bacteria that can infect many species of animals and man. Six species were classically recognized within the genus Brucella: B. abortus, B. melitensis, B. suis, B. ovis, B. canis, and B. neotomae [1, 2]. This classification is mainly based on differences in pathogenicity, host preference, and phenotypic characteristics [1–3].