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  1. Cells from a urine infection, SEM
  2. Scanning electron micrograph of HIV particles infecting a human H9 T cell
  3. Salmonella bacteria, SEM
  4. Bacteria infecting a macrophage, SEM
  5. Microscopic view of the common cold virus
  6. Virus particles, artwork
  7. E. coli bacteria, SEM
  8. Breast cancer cells, SEM
  9. Colorized scanning electron micrograph of filamentous Ebola virus particles
  10. Cryptosporidiosis, TEM
  11. Microscopic view of Giardiasis
  12. Yeast protein interaction map
  13. Enterococcus faecalis bacteria, SEM
  14. Used interdental brush, SEM
  15. Bacterial lung infection
  16. Hepatitis C virus, molecular model
  17. Rod-shaped bacteria, artwork
  18. Artistic representation of the immune system's reaction to bacteria invading the tissues
  19. Group of Escherichia coli bacteria cells, known as E. Coli
  20. Group of H5N1 virus with glassy view
  21. Salmonella, TEM
  22. Bladder cancer cells dividing, SEM
  23. Microscopic view of Stachybotrys