Transmission It is transmitted by ingesting infected food, direct contact with an infected animal or inhalation of aerosols transmission from human to human is exceedingly rare, but possible Minimum infectious exposure is between 10-100 organisms Brucellosis primarily occurs through occupational exposure (e.g. exposure to cattle, sheep, pigs), but also by consumption of unpasteurized milk productsTransmission • It is transmitted by ingesting infected food, direct contact with an infected animal, or inhalation of aerosols. Transmission from human to human is exceedingly rare, but possible. Minimum infectious exposure is between 10 - 100 organisms. • Brucellosis primarily occurs through occupational exposure (e.g. exposure to cattle, sheep, pigs), but also by consumption of unpasteurized milk products