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Based on the Exercise on the Isolation of Coliform to assess water quality. When is your drinking water safe for drinking? Why? Why not? *
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Solved in 2 steps
- Identify (stepwise) the process of purifying drinkingwater. What important contaminants are targeted byeach step in the process?Discuss the process of purifying drinking water and the importance of each step in the removal of contaminants.match coloumn a to coloumn b coloumn a coloumn b 11. Safe drinking water is totally free from chemicals.12. Total bacteria present in water samples from water vending machines isdetermined using an enzyme-substrate test. 13. All water samples from the La Trinidad water district must report <1.1 MPNper 100 mL total coliform to comply with DOH standards. FALSE All water samplesfrom the La Trinidad water district must report <1.1 MPN per 100 mLthermotolerant coliform to comply with DOH standards.14. Baguio ice plant and cold storage samples must be tested with the presenceof total bacteria, total coliform, and thermotolerant coliform once a month.15. A water sample that contains beyond the maximum acceptable level oftotal coliform must be retested. a. true b. false
- "To discard the household waste we should have two separate dust-bins, one for the biodegradable waste and the other for the non-biodegradable waste." Justify this statement suggesting the proper way of disposal of these wastes.What other methods can be used to determine the microbiological quality of water? What infectious diseases can be transmitted by polluted water? Give at least 2 viral, 2 bacterial, and 2 protozoan waterborne infectious agentMake a unique answer: Describe the methods for identifying and quantifying microbial contaminants in water supplies.
- What is the most likely biosafety level of your introductory microbiology lab classroom? BSL-1 BSL-2 BSL-4 BSL-3Leachate production is whatColiforms are commonly used as an indicator of drinking water quality. As we discussed, in March and April of 1993 there was a major outbreak of gastrointestinal illness in Milwaukee, Wisconsin caused by contamination in the public drinking water supply. As summarized by MacKenzie et al.1, “throughout the period from February to April 1993, samples of treated water from both (water treatment) plants were negative for coliforms and were within the limits set by the Wisconsin Department of Natural Resources for water quality.” Why, in this case, did coliforms remain at acceptable levels despite water contamination that resulted in over 400,000 cases of gastrointestinal illness?
- 1. Why is water activity important? 2. Do an online search to learn about four foods with low water activity. What organisms , if any. grow in these foods? 3. Do an online search to learn about four foods with high water activity. What organisms, any, grow in these foods? 4. go to https://www.metergroup.com/food/articles/microbial-growth/ What are the approximate water activity values of the organisms used in today's exercise? 5. List the media used in today's lab in order from that with the lowest water activity to that with the highest activity . On which do you expect to see growth of all the microbes ?Which of the following microbes grow best below 20 degrees C? thermophiles mesophiles hyperthermophiles psychrophilesWhich of the following statements regarding low temperature storage is FALSE? Question options: freezing inhibits microbes through the unavailability of water freezing causes microbial death largely through DNA denaturation all of these statements are TRUE refrigeration functions largely by reducing the metabolic rate of microbes psychrophiles are generally not effectively inhibited by refrigeration many bacteria can survive freezing for years at a time