Check out the Transmission and incubation paragraph.
Once the susceptible animal ingests the organism, the bacterium progresses to the regional lymph nodes where it resides during the incubation period.....After a subsequent brief phase when the bacteria are in the bloodstream, the organism colonize the uterus, placenta, udder, and/or regional lymph nodes.
Even though ~50mg may be the most the body can use in a day, this sounds like a case of more the better, much more.