Pathogen terms

5. anything that can produce disease.
6. a biological agent that reproduces inside the cells of living hosts.
8. used in the treatment and prevention of bacterial infections.
9. make (something) impure by exposure to or addition of a poisonous or polluting substance.
10. typically by being exposed to something contagious.
11. a unicellular organism that lacks a membrane-bound nucleus.
14. worldwide spread of a new disease.

1. constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length.
2. the communication of disease from one person to another by close contact.
3. a highly contagious viral infection of the respiratory passages causing fever, severe aching, and catarrh, and often occurring in epidemics.
4. a non-mutual relationship between species.
7. biological preparation that provides active acquired immunity to a particular disease.
12. a widespread occurrence of an infectious disease in a community at a particular time.
13. is any member of the group of eukaryotic organisms.