Across
- 4. Confined to a particular area or country
- 9. Skin, respiratory tract, urogenital
- 11. Direct, indirect
- 13. Touching someone while having a disease, how does it leave?
- 14. Molds, rusts, mildews, smuts, mushrooms, and yeasts
- 15. A single-celled, prokaryotic microorganism
Down
- 1. Someone who specializes in the study of outbreaks within a population
- 2. A harmless variant of a pathogen that stimulates a host's immune system to fight off diseases
- 3. People, animals, the environment
- 5. Children, elderly, unimmunized people
- 6. A tiny, nonliving particle that invades and then reproduces inside a living cell
- 7. Tapeworm, liver fluke, ascarid, or leech
- 8. Any eukaryotic protist of the phylum
- 10. Infection acquired in a hospital
- 12. Abnormal forms of normal cellular proteins