This is a live attenuated bacterial vaccine meant to control Brucellosis in cows. It is vaccinated to young females between 3 to 9 months of age. Brucellosis is a zoonotic disease which occurs in Tanzania and disease has been reported in Iringa, Arusha, Coast, Dodoma, Singida, Mbeya, Morogoro, Kilimanjaro, Shinyanga, Kagera, Manyara and others places. In many places where disease was reported also human beings have been reported to be infected. Control of Brucellosis in the past was difficult due to unavailability of vaccine and when possible was expensive and required importation from abroad. This obstacle is now overcome through the development of a vaccine we produce. A success in control of disease is now realized through reports of reduction of Brucellosis cases in the country with sporadic cases occurring in areas where vaccine has not been used. The vaccine is affordable and packed in battles of 100ml containing 20 doses of which one dose is 5mls. This pack suffices the need of most dairy cow keepers considering the herd sizes of smallholder farmers. This vaccine is effective and administered by subcutaneous injection. The modernization of livestock farming and sensitization to increasing dairy farming in the country requires sustainable production of the vaccine to enable availability in the market. This vaccine requires cold chain for storage.