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Q: What is the correct arrangement of the unknown bacterium growing on your MacConkey agar?
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Q: What bacteria grow on both a MacConkey agar plate and Mannitol Salt agar?
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Q: How can I tell if there is contamination?
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Q: why macconkey agar and mannitol salt are regard as salective and deffrental medium?
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Q: If you suspect that your microbial culture growing in nutrient broth is contaminated, what can you…
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how could you determine if there is any contamination on your agar?
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Solved in 2 steps
- How can I tell if there is contamination?You mixed up the numbers on the tubes when you inoculated the mannitol salt agar (MSA) plate. You do not know if you grew staph epidermis or E. coli. You found that the organism growing on the mannitol salt agar remained red after incubation. It is most likely that the organism is E.coli. a) True b) False1) would you describe the contents of the soil-inoculated broth as being a “pure culture”? Why or why not? 2) How did the uninoculated broth differ in appearance from the broths inoculated with E. Coli and M. Luteus? And then how could you tell if a supposedly sterile, uninoculated broth was contaminated? Please explain in detail and highlight the important parts cuz I am confused and need help! Thanks
- Why the microorganisms in the hay infusion are not stained?Abigail did not dry the top of her agar plate and stored it top up. Now she wants to count colonies but there is a smear over the entire plate. She was working with E. coli. Why does she have a smear?Why did you perform the catalase test on colonies growing on nutrient agar plates but not on the blood agar plates?
- I'm having trouble identifying the type of bacteria I have cultured. I know that it is gram-negative and cocci in shape, it grows wonderfully on the MSA plate but did not grow so well on the EMB plate, and it is non-motile. It has a yellow color but I'm just not sure what it is. It was obtained from a public area. Any ideas?In the preparation of a bacterial smear, why is there a need to fix the bacteria to the slide? Aside from passing the slide over a flame, what are the other ways of fixing the bacteria to the slide?What is the correct shape of the unknown bacterium growing on your mannitol salt agar?
- Why does uninoculated agar plates still has visible growth of microorganisms? Where do you think the microorganisms came from?a) explain in your own words how to do a nitrate reduction test to identify unknown bacteria b) explain in your own words how to perform a phenol red broth (prb) test to help identify unknown bacteriaYou are hired in one of the microbiology labs in Memphis and your first assignment to identify microbial samples from a local restaurant. You are given a set of slides and asked to classify the specimens as Gram positive or Gram negative. 6) What would be the last reagent you use to identify the bacteria? 7) What type of visual aid you need to help you see the bacterial samples clearly? 8) After the use of what reagent, you will be able to decide if you have a Gram positive or Gram negative bacteria? **Please give the answer**