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Maybe this site can help us in intro n understanding

http://www.merckvetmanual.com/reproductive-system/brucellosis-in-large-animals/brucellosis-in-cattle

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Most important immunity type that involve (CMI or humoral immunity). Why

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Most important immunity type that involve (CMI or humoral immunity). Why

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Immunological-based strategies (ie: vaccination) against this disease? 

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Immunological-based strategies (ie: vaccination) against this disease? 

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Effectiveness of the vaccine to control the disease

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For referenc

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It is a gram negative, rod and fastidious bacteria.

Mode of transmission via direct contact from birthing tissue and fluid such as placenta, blood, aborted fetus; milk, urine and semen of infected bull.