Chapter 10

3. the ratio of the toxic dose to the effective therapeutic dose that is used to assess the safety and reliability of drug
4. nutrients used to stimulate the growth of favorable biota in the intestines
9. toxic property of an antimicrobial agent to be highly toxic against its target microbe while being far less toxic to other cells, particularly those of the host organism
10. the altered usually exaggerated, immune response to an allergen also known as hypersensitivity
11. substances produced by the natural metabolic processes of some microorganisms that can inhibit or destroy other microorganisms
13. use of a drug to prevent infection of a person at risk
15. a substance derived rom cinchona trees that was used as an antimalarial treatment; has been replaced by synthetic derivatives

1. drugs that are chemically modified in the lab after being isolated from natural sources
2. an adaptive response in which microorganisms begin to tolerate an amount of drug that would ordinary be inhibitory
5. the use of drugs to control infection
6. the range of blood level of the drug in which it is producing the desired effect without toxicity.
7. the smallest concertation of drug needed to kill test bacteria
8. the smallest concentration of drug needed to visibly control microbial growth
12. drugs produced entirely by chemical reaction
14. Preparations of live microbes used as a preventative or therapeutic measure to displace or compete with potential pathogens