| antibiotic
- [n] a chemical substance that comes from a mold or bacterium that
kills microorganisms and cures infections |
| contagious
- [adj] easily spread from one person to another |
| effective
- [adj] works well as a remedy |
| flea
- [n] any wingless blood-sucking parasitic insect noted for ability
to leap  Rodents
Pests and Their Control |
| growth
medium - a substance containing nutrients to support growth of microorganisms |
| lymph
nodes - small glands clustered in the neck, armpits, abdomen, and groin
that supply infection-fighting cells to the bloodstream and filter out bacteria
and other disease causing particles. |
| microogranisms
- a living thing that can only be seen through a microscope; includes
bacteria, fungi, protozoans, and microscopic algae |
| microscope
- [n] magnifier of the image of small objects; "the invention
of the microscope led to the discovery of the cell" |
| natural
pest-killer - a natural chemical used to kill insects |
| parasites
- [n] an animal or plant that lives in or on a host |
| respiratory
tract - [n] the passages through which air enters and leaves the body
|
| sample
- a small part of something collected as an example of the whole |
| sewage
- [n] waste matter carried away in sewers or drains |
| symptoms
- something that is shows a person has a certain illness |
| tick
- [n] any of two families of small parasities, related to spiders
and mites. They feed on blood of warm-blooded animals. (The tick on the
right is enlarged because it has been feeding on the host.)
emedicine.com |