The first bacterium that was clearly identified as the cause of an infectious disease was:
A) Legionella pneumophila, which causes Legionnaires' disease.
B) Chlamydia sp., which causes pelvic inflammatory disease in women.
C) Clostridium botulinum, which causes botulism.
D) Vibrio cholerae, which causes cholera.
E) Bacillus anthracis, which causes anthrax.

Question

Quizplus · Accepted Answer

Bacillus anthracis was the first bacterium to be identified as the cause of an infectious disease by Robert Koch in 1876, establishing the germ theory of disease.

The First Bacterium That Was Clearly Identified as the Cause