Brucellosis is one of the major bacterial zoonosis spread worldwide. The disease has different names: Infectious abortion, contagious abortion, enzootic abortion in animals; and Crimean fever, Mediterranean fever, Rock fever, Undulant fever or Malta fever in humans. According to World Health Organization, brucellosis is classified among the top seven world neglected zoonotic diseases. The true incidence of human brucellosis is not easy to estimate globally but an estimated number of more than 500,000 persons get infected newly every year. Genus Brucella (B.) is a Gram negative, intracellular pathogens encompassed 11 accepted nomo-species. B. microti is one of a recently recognized species and characterized by fast growth on standard media. It was isolated from common voles, red foxes and soil in Austria and Czech Republic and from a wild boar in Hungary. This wide diversity in the reservoir species may plays a significant role in its epizootic spread. Its pathogenicity for human and livestock has not been confirmed yet