5.1 Key Terms Quiz Infection

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Across
  1. 6. The way a microbial organism moves from one host to another.
  2. 9. A cell (as a white blood cell) that engulfs and consumes foreign material (as microorganisms) and debris.
  3. 10. A type of lymphocyte that develops in the bone marrow and later produces antibodies.
  4. 12. Any of a large group of submicroscopic infective agents that typically contain a protein coat surrounding an RNA or DNA core of genetic material but no semipermeable membrane, that are capable of growth and multiplication only in living cells, and that cause various important diseases in humans, animals, or plants.
  5. 13. The state produced by the establishment of an infective agent in or on a suitable host.
  6. 14. A condition of being able to resist a particular disease, especially through preventing development of a pathogenic microorganism or by counteracting the effects of its products.
  7. 18. Communicable by contact.
  8. 19. A spherical bacterium.
Down
  1. 1. Any of various infectious proteins that are abnormal forms of normal cellular proteins, that proliferate by inducing the normal protein to convert to the abnormal form, and that in mammals include pathogenic forms.
  2. 2. A type of lymphocyte responsible for cell-mediated immunity that differentiates under the influence of the thymus.
  3. 3. An antigen-binding immunoglobulin, produced by B cells, that functions as the effector in an immune response.
  4. 4. A method for the differential staining of bacteria that involves fixing the bacterial cells to a slide and staining with crystal violet and iodine, then washing with alcohol, and counterstaining with safranin. Results in gram-positive bacteria retaining the purple dye and gram-negative organisms having it decolorized so that the red counterstain shows up.
  5. 5. A branch of biology dealing especially with microscopic forms of life (as bacteria, protozoans, viruses, and fungi).
  6. 7. A procedure performed under sterile conditions.
  7. 8. A spiral-shaped bacterium.
  8. 11. Saprophytic and parasitic spore-producing eukaryotic organisms that lack chlorophyll and include molds, rusts, mildews, smuts, mushrooms, and yeasts.
  9. 15. A parasitic worm (as a tapeworm, liver fluke, ascarid, or leech).
  10. 16. Any protist of the phylum or subkingdom Protozoa.
  11. 17. A cylindrical or rod-shaped bacterium.