Describe the standardized tests used to measure coliform density in water from preliminary tests, confirmatory tests and complete tests.
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- Describe the standardized tests used to measure coliform density in water from preliminary tests, confirmatory tests and complete tests.
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- Describe the process of qualitative water test for coliform contamination. If shown EMB plates, be able to determine if coliforms are present or not.What is the preferred specimen type for lipid studies in a clinical setting? EDTA, Serum, 24 hour urine, Sodium fluoride?Does a positive presumptive test mean that the water is absolutely unsafe to drink? Explain
- For a simple routine qualitative analysis, why is an early morning sample of urine used for the tests, and not a sample collected after a meal? Explain briefly.Describe the proper technique for performing reagent strip testing.What are the common tests that are used to identify water quality? Briefly describe them
- Thermotolerant coliforms are often referred to as "faecal coliforms", although the organisms may not be of faecal origin. The time interval between collection of the sample and testing shoud not exceed 6 hours, why is this?Describe situations that require high-level disinfection and thosefor which medium- or low-level disinfection is adequate.In a(n) _________ test, the effectiveness of a microbial control agent is compared to that of carbolic acid. Question options: use-dilution in-use Kelsey-Sykes capacity phenol coefficient Entner-Doudoroff algebra
- what is the purpose and objectives on doing nitrious acid test?What is the most commonly used fixative in stool samples and why?Explain this example of the following water quality serial dilution. Note the dilution factors and how you would calculate #’s from the incubated plates. ……A serial dilution yielded TNTC in the 1:1 plate and the 1:10 plate, 50 cfu’s in the 1:100 plate and 3 cfu’s in the 1:1000 plate . What is the concentration (CFU)/ml of the raw sample? Is water acceptable for potable or Recreational use? Explain. When do you use filtration rather than serial dilution