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Viruses called phages attacking bacteria. Scenes like this are playing out within the ecosystem of your body even now.
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 iblhdf02266033
biomedicalephemera: Bacteriologic Chart Gonococcus spp. Pneumococcus spp. Streptococcus pyogenes Micobacterium tuberculosis Vibrio cholerae Corynebacterium diphtheriae Bacterium typhosum Bacterium dysenteriae Achorion Schonleinii [favus fungus] Bacillus anthracis Bacillus aerogenes capsulatus Yeast cells - With buds and ascospores depicted Deadly diseases are almost pretty, when stained and smeared on a microscope slide… Postmortem Pathology. Henry W. Cattell, 1906.
Bacteriophage - These bacteria-infecting viruses, phages for short, are the most abundant life-form on the planet, their number far exceeding that of stars in the universe. Trillions inhabit each of us. Photograph by Department of Microbiology, Biozentrum, University of Basel/Photo Researchers, Inc All Images Colorized