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- Many antibacterial hand soaps contain the chemical agent _____ , which belongs to the _____ antimicrobial category. a. sodium hypochlorite; halogen b. triclosan; phenolic c. sodium chlorite; halogen d. ethanol; alcoholA study of microbial pathogen transport in an aqueous environment is to be studied. The target microorganism is Escheria Coli with a characteristic length of 25 micrometers. The pathogen moves at a rate of 2.5 micrometer/second. What model fluid should be used? Why?Which of the following is NOT a property of an antimicrobial agent? a. Must have a known concentration over a period of time required to eliminate a pathogen b. all choices are correct c. must be selectively toxic d. Must have a favorable chemotherapeutic index
- Microbes are exposed to a wide variety of environmental factors that affect growth and survival. By giving two (2) examples, discuss how the microbial survival in various environmental conditions has been used to understand its ability to make flavorful and long shelf-life type of foods.which of the following is not a chemical method of microbial control? a. soaps and detergents b. hydrogen peroxide c. filtration d. food preservationsThe statements are given below, which will best describe why antimicrobial drugs that affect cell wall synthesis tend to have selective toxicity when used by humans? Human cells only synthesize peptidoglycan as a food source Cell wall synthesis is a common metabolic process in humans and bacteria. Most bacteria only synthesize cell walls during their log phase of growth. Human cells do not have cell walls.
- What is an experiment used to determine an antimicrobial agent is acting as a cidal or static agent.Drying is an effective antimicrobial strategy because:(a) It oxidizes cellular macromolecules(b) It limits the amount of water available to microbes(c) It increases susceptibility to UV irradiation(d) It triggers the thermal death pointCompare and contrast the action of alcohols, halogens, and oxidizing agents in controlling microbial growth.
- Which of following statements is TRUE about antiseptics and disinfectants? A. Disc diffusion works because the disc is soaked in bacteria and is the exposed to antimicrobial. B. You can tell the characteristics of the zone inhibition whether an organism is cidal or static in its effect. C.The shape of an object being cleaned may influence the effectiveness of germicides D. Gram + organisms are more resistant than Gram - organisms E. A large zone of inhibition shows bactericidal effectExplain the difference in Microbial Inhibitory Concentration and Microbial Bactericidal Concentration. (When explaining differences you have to talk about both things being compared. Just explain how they are different. Definitions will not be accepted.)Which of the following is not used as an antiseptic? A. Chlorhexidine B. Phenol C. Iodophor D. Hydrogen Peroxide