Microbiology study group spring 2009

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Just wanted to Start a study group for spring semester .I thought it will also be fun to give pop questions for us to make up from our classes and answer to help us learn more. Hope to hear from u guys

bluemalibu, thank you so much. I was really stumped.
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You're welcome... and I forgot to mention that Listeria monocytogenes is correct for your second scenario.

~Blue

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Double thankyou. We have a takehome assignment and it is quite a bit of work. I am thinking that I would have preferred an actual exam.

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Specializes in ICU.

I am studying for my first lab exam. Can anyone give me practical/beneficial uses for the following fungi?

Rhizopus

Aspergillus

Penicillium

Saccharomyces

Candida

I have looked through my entire lab manual and can't find this info anywhere.

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penicillum- antibiotic

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Rhizopus is used in the malting of barley, and Rhizopus delemar has found a use in the remediation of standing bodies of water that have become contaminated by acid rain.

Penicillium is of course used in the production of the antibiotic penicillum.

Saccharomyces is the yeast used in bread making.

Candida has been used recently to aid in the formation of new epithelium to cover cancerous lesions of the mouth and throat. Without Candida Albicans in our intestines we would be defenseless against many pathogenic bacteria.

Aspergillus is used to ferment the Japanese liquor sake.

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What type of bacteria (gram positive or gram negative) and microbes are beta-lactam drugs such as penicillin effective against? Does the outer membrane in Gram-negative bacteria stop the drug from being effective?

Thanks

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A newborn female developed extensive vesicular and ulcerative lesions over her face and chest. What is the most likely cause of her symptoms? How would you determine the viral cause of this disease without doing a viral culture?

I'm thinking rubella or roseolovirus. Any takers?

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What type of bacteria (gram positive or gram negative) and microbes are beta-lactam drugs such as penicillin effective against? Does the outer membrane in Gram-negative bacteria stop the drug from being effective?

Thanks

The 'cillin drugs act as an inhibitor to cell wall synthesis. They are effective against gram positive microbes which have a thick peptidoglycan wall. The gram negative microbes have an outer membrane of phospholipids which shield the cell wall from contacting the antibiotics, and therefore are relatively ineffective against them.

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What bluemalibu said...penicillins are very effective against microbes with thick Peptidoglycan walls and less effective against microbes which have a lps layer.

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Oh okay... Thank you both for your help!

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Specializes in Critical Care.

I know its been ages since this thread was relevant lol (M.Bio. took up soo much time I was never on Allnurses, so I forgot), but I just wanted to post a little celebration post. I got an A (was 98%) as my final grade in Microbio. !!! :D I'm super happy and grateful! Kudos to all of you who made it through - esp. those of you who had bad teachers. :yeah: I got lucky and had a really nice teacher and wonderful classmates and a good textbook. :D Still it was alot of work and I'm glad its over! Now on to A&P :eek:

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Congrats!!!!! I know is an excellent idea to do this kind of study group. It's a lot of support and you all want to get "As." Good for you!

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