Across
- 4. Made the observation that his patients who had contracted and recovered from cowpox, seemed to be immune not only to further cases of cowpox, but also to smallpox.
- 5. Was the founder of antiseptic medicine.
- 8. While investigating tobacco mosaic disease on plants, proposed that the infectious agent was a “filterable virus”.
- 10. Discovered that a substance produced by the mold Penicillium killed cultures of staphylococcal bacteria.
- 11. Used heat to sterilize culture media, eliminating unwanted microorganisms.
- 12. Living organism or particle that causes an infectious disease.
- 15. A process named after Louis Pasteur.
- 16. Discovered that yellow fever in humans is caused by a virus.
- 18. Devised a set of steps called Koch’s postulates.
Down
- 1. Wrote in a poem that diseases could be transmitted by direct contact with an infected. person, contaminated materials or infected air
- 2. Robert Koch was studying this disease when he came up with the four steps to prove the "germ theory".
- 3. Discovered the microorganism.
- 6. A type of protein that can trigger normal proteins in the brain to fold abnormally.
- 7. Diseases that have not occurred in humans before or that occurred only in small numbers in isolated places.
- 9. While studying foot-and-mouth disease, these two discovered that the infectious agent was small enough to pass through filters that would screen out all known bacteria.
- 13. Organisms that live at the expense of another organism.
- 14. Diseases that once were major health problems globally or in a particular country, and then declined dramatically, but are again becoming health problems for a significant number of our population.
- 17. Body of an organism that harbors another organism.