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  1. Helicobacter pylori bacteria
  2. Pseudomonas aeruginosa bacteria, SEM
  3. Escherichia coli bacteria, SEM
  4. Bacteria infecting a macrophage, SEM
  5. TEM of Bordetella pertussis bacteria
  6. Used interdental brush, SEM
  7. Conceptual image of influenza causing flu
  8. Staphylococcus epidermidis bacteria
  9. HIV particles, TEM
  10. Bacterial lung infection
  11. TEM of Proteus mirabilis bacterium
  12. Petri dish bacterial cultures, picking a colony
  13. Bacteria infecting macrophage cells, SEM
  14. Tongue bacteria, TEM
  15. Clostridium botulinum bacteria with spores
  16. Conceptual image of plasmodium causing malaria
  17. Hepatitis C virus, molecular model
  18. Microscopic view of poliovirus
  19. Microscopic view of Stachybotrys chartarum
  20. Syphilis bacterium (Treponema pallidum)
  21. Conceptual image of flagellate bacterium
  22. Stack of petri dishes with bacterial cultures
  23. Bacteriophage virus, artwork
  24. Rod-shaped bacteria, artwork
  25. Microscopic view of cell and virus
  26. Mycobacterium tuberculosis bacteria
  27. Cell division in Salmonella bacterium
  28. Microscopic view of ebola virus
  29. Antibiotic cell membrane effect, artwork
  30. Porphyromonas oral bacteria, TEM
  31. Microscopic view of herpes virus
  32. Tongue bacteria, SEM
  33. E. coli bacteria, SEM
  34. Salmonella bacteria, SEM
  35. Helicobacter pylori bacterium, TEM
  36. Artistic representation of the immune system's reaction to bacteria invading the tissues
  37. Gut bacterium, TEM
  38. Conceptual image of the coronavirus
  39. Viral transfer of bacterial DNA, artwork
  40. Antibiotic mechanism of action, artwork
  41. AIDS pneumonia infection, TEM
  42. Anthrax bacteria
  43. Microscopic view of virus
  44. Group of Escherichia coli bacteria cells, known as E. Coli
  45. Antibiotic acting on bacteria
  46. Microscopic view of a leukemia cell
  47. Bacteria infecting a macrophage, SEM
  48. Group of H5N1 virus with glassy view