"B. abortus" is the principal cause of brucellosis in cattle. Brucellosis is caused by different biotypes of "Brucella abortus" and "B. melitensis". Alice's investigation focused on the organism "Bacillus abortus", known to cause miscarriages in animals. "Ch. pneumoniae", "Ch. abortus", and "Ch. psittaci". He discovered Brucella abortus in 1897, which came to be known as "Bang's bacillus". The prokaryotic "B. abortus" is non-spore-forming, non-motile and aerobic. "B. abortus" also affects bison. Granulomas ("B. abortus"), hepatitis ("B. melitensis"), and abscesses ("B. suis") are seen. Cattle and other livestock are the major host species for the bacteria "B. abortus". Temperature plays a huge role in the survival of "B. abortus". Ticks are another source of transmission for "B. abortus". Sadly, Rachel died in March 1901 from a miscarriage ("abortus" on her death certificate). "Brucella" has twelve different kinds of species, one being "Brucella abortus". "C. abortus" has been isolated from birds.