They wanted to punish the South, and to prevent the ruling class from continuing in power. They passed the Military Reconstruction Acts of 1867, which divided the South into five military districts and outlined how the new governments would be designed.
Klebsiella can be quite serious as it causes a variety of diseases: Liver abscess, meningitis, pneumonia, blood stream infection, urinary tract infection, septic joints, solid organ abscess, infection of the heart and valves, prostate infection...
The Shigella germ is actually a family of bacteria that can cause diarrhea in humans. They are microscopic living creatures that pass from person to person. Shigella were discovered over 100 years ago by a Japanese scientist named Shiga, for whom they are named.