Across
- 4. An infective agent that typically consists of a nucleic acid molecule in a protein coat and is able to multiply only within the living cells of a host.
- 5. A member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus
- 6. Any of a group of spore-producing organisms feeding on organic matter
- 9. A substance used with water for washing and cleaning
- 11. A medicine or other substance which has a physiological effect when ingested or otherwise introduced into the body
- 13. Prevalent over a whole country or the world.
Down
- 1. Conditions or practices conducive to maintaining health and preventing disease
- 2. A covering for all or part of the face
- 3. An organism that lives in or on an organism of another species (its host) and benefits by deriving nutrients at the other's expense.
- 7. The state or quality of being resistant to a particular infectious disease
- 8. A bacterium, virus, or other microorganism that can cause disease.
- 10. Free from bacteria or other living microorganisms; totally clean
- 12. A physical or mental feature which is regarded as indicating a condition of disease