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- 4. discuss the disinfection protocols for removing potential pathogens in frequently- used environments.3. Why not test water samples directly for Salmonella typhosa or other pathogens?3. Which disinfectant would you choose if you were trying to kill both bacterial species? (In other words, which chemicals works the most effectively against both species tested?) 4. Which disinfectant is the least successful against each bacterial species? (You should have an answer for the least effective against Gram positives and an answer for the least effective against gram-negatives- it may or may not be the same chemical.)
- 1. How is UV radiation a good type of control mechanism against microbial growth and what happens to the microbe and effects this control causes.3A.) A throat and nasal sample are taken from a patient to determine the type of bacterial infection they are suffering from. Would a gram stain help clearly identify the bacteria responsible for causing the infection? Why or why not? What else would be found there? (Think critically) 3B.) What other types of test could you do to determine what is causing the infection? (You may need to do a little outside research)1. What is the significance of biofilm presence on medical equipment?
- 1. List multiple reasons why preventing the growth of certain microbes is necessary/valuable 2. For bacterial growth, what can we do to compose a continuous culture where we would get continuous supply of the product? 3. Antibiotics - How did we compose major issues for treatment through resistance built up from the antibiotics?1. The colonies on a negative MSA plate would appear _____________. 2. "E. Coli and S. epidermidis were chosen to represent Gram-negative and Gram-positive bacteria, respectively. For a given antibiotic, is there a difference in susceptibility between the Gram-positive and Gram-negative bacteria?" "No, they are usually similar" "yes, drugs that target the cell membrane are more effective on gram negatives" "yes, drugs that target the cell wall are more effective on gram negatives" "yes, drugs that target the cell wall are more effective on gram positives" how can I tell the difference1. Why do you think the 5% sheep blood agar was selected for the culture of mouth bacteria?
- What is a biofilm? Give an example of a biofilm that is beneficial to humans and one that is harmful.1. Why should we not use toothpicks in streaking bacterial colonies in an agar plate? what should be used instead of toothpicks? 2. Enumerate at least two normal flora each living in the skin and in the intestines I will upvoteee2. You use tubes to test aerotolerance of bacteria. From your samples you have 3 results: A. Bacteria growing on the surface. B. Bacteria growing throughout the tube, the agar shows cracks. C. Bacteria growing about 5 mm below the surface. Please interpret each bacterial result. (Give the bacteria an oxygen classification, explain what classification means and interpret the cracks in the agar.)