Infectious Diseases

3. Type of immunity acquired by receiving antibodies from a source other than one's own immune system.
6. Your body's ability to destroy pathogens it has previously encountered.
7. Single-celled organisms larger and more complex than bacteria.
9. Type of infectious disease that has become increasingly common in humans within the last 20 years.
12. This disease caused by ticks infects more than 20,000 people each year.
17. Caused by bacteria or viruses that enter and multiply in the body (2 words).
19. Single-celled microorganisms.
20. About 100 x smaller than bacteria.
21. One example of a disease caused by bacteria (2 words)
25. One type of immunization recommended for 4 to 12 years old.
27. Pathogens can be spread through contact with an infected person or animal, contaminated objects or food, water and:
28. A virus that invades skin cells.
29. Type of worm that can live in the muscle tissue of some animals, especially pigs.
30. One example of a disease caused by protozoans (common in the game Oregon Trail).
31. One example of a disease caused by fungi.
33. One example of a disease caused by viruses.
34. Viral disease that develops from the flu.
35. Prescription medicine that inhibits or kills bacteria.
36. An infection of the fluid in the spinal cord or brain.
37. Primary physical and chemical barrier against pathogens.

1. Yeast, molds and mushrooms.
2. Type of white blood cell that carries out most of the immune system's functions.
4. Protective lining covering openings in your body such as mouth, eyes and nose (2 words).
5. Highly contagious bacterial infections of the lungs.
8. Can cause an infectious disease when they enter the body.
10. First stage of the flu, from day 1-3.
11. Poisons given off by some bacteria.
13. Type of white blood cell that fights disease.
14. Disease-causing organisms so small they can only be seen through a microscope.
15. Group of viruses that infect the liver.
16. Along with tears, this traps and washes away pathogens.
18. An unusually high occurrence of a disease.
22. One type of immunization from birth to 4 months.
23. Type of immunity that results from either having a disease or from receiving a vaccine.
24. Tiny hair-like structures that help trap and remove pathogens.
26. The body's second line of defense - fights infections and promotes the healing process.
30. One type of immunization recommended for 6-18 month year-olds.
32. The bacterium known as strep throat.