Terms relating to health and safety

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Across
  1. 5. To be free of bacteria and other micro-organisms that could cause disease (7)
  2. 6. A substance that stops bacteria from reproducing but does not kill them (12)
  3. 8. Disease producing and harmful (10)
  4. 9. Medical term that describes a state of having sufficient biological defenses to avoid infection, disease, or other unwanted invasion (8)
  5. 10. Infection transferred from one person to another usually due to poor hygiene practices (5-9)
  6. 13. An abnormal condition of an organism that impairs bodily function and can be deadly (7)
  7. 16. The unit used to measure the acidity or alkalinity of a substance (2)
  8. 19. Poisonous substances produced by living cells or organisms (6)
  9. 20. Refers to practices associated with ensuring good health and cleanliness (7)
  10. 23. To make something clean and sanitary (10)
  11. 24. The overpopulation of an organism (11)
  12. 26. Infectious agents that are unable to grow or reproduce outside a host cell (7)
  13. 27. Large group of uni-cellular organisms that can be either pathogenic or non-pathogenic (8)
  14. 28. A substance that kills or inhibits fungi and fungal spores (9)
Down
  1. 1. Microscopic plant organisms consisting of many cells and are parasitic in nature (5)
  2. 2. Colour of the label on a fire extinguisher containing carbon dioxide (5)
  3. 3. A chemical agent which completely destroys bacteria (12)
  4. 4. A substance that kills bacteria and ideally nothing else (11)
  5. 7. Colour of the label on a fire extinguisher containing water (5)
  6. 11. The complete destruction of micro-organisms and their cause (13)
  7. 12. Does not produce disease and is not harmful (3-10)
  8. 14. Colour of the label on a fire extinguisher containing foam (4)
  9. 15. Detrimental colonisation of a host organism by a foreign species (9)
  10. 17. Colour of the label on a fire extinguisher containing powder (5)
  11. 18. The breathing in of a substance (10)
  12. 21. The consumption of a substance (9)
  13. 22. A chemical or biological agent that stops fungi from reproducing (9)
  14. 25. A chemical agent which inhibits the growth and multiplication of bacteria (10)