Caption
Bacteria smears of germs for microbiological diagnosis, microscope slides, clinical microbiology, state of scientific research around 1915, 1: Diphtheria or Corynebacterium diphtheriae, 2: Diphtheria or Corynebacterium diphtheriae, 3: Yersinia pestis, 4 Salmonella Typhi, 5: Vibrio cholerae, 6: Spirillum