Croosword puzzle

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Across
  1. 1. free from microorganisms
  2. 3. caused by Entamoeba histolytica
  3. 5. recent pandemic caused by
  4. 7. Trepanoma pallidum
  5. 9. do not like oxygen
  6. 11. ____resistance: the silent pandemic
  7. 13. Active acquired immunity
  8. 16. resistance against pathogens
  9. 17. process in yogurt, pickle, beer production
  10. 18. ___staining: background is stained
  11. 19. ____eye: conjunctivitis
  12. 20. Typhoid ___, her cooking made folk ill
Down
  1. 2. food that help in growth of gut bacteria
  2. 4. both organisms involved are benefited
  3. 6. carry Oxygen to tissues
  4. 8. bacteria found in yogurt
  5. 10. salt loving
  6. 12. using living organisms to remove pollutants
  7. 14. complementary to antigen
  8. 15. an organism that cause disease