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Gram-negative bacteria

Gram-negative bacteria

(Science: microbiology) bacteria which lose crystal violet stain but are stained pink when treated by grams method.

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Using oxidizing agents in gram stain

... happen if I replaced iodine with another oxidizing agent during the gram staining process ? So far I know that the purpose of the iodine is to ... complex with the crystal violet in order to enable the cell wall of the bacteria to retain the dye but certainly there must be other oxidizing agents ...

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by ccBiologist
Sun Sep 22, 2013 2:44 pm
Forum: Microbiology
Topic: Using oxidizing agents in gram stain
Replies: 1
Views: 851

Re: Bacteremia in humans

PS: Just realized SA is a Biosafety level 2 bacteria, so I am left with no common, Biosafety-level 1 gram positive bacteria to test! Which one should I use then?

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by trivedv
Fri May 03, 2013 7:31 am
Forum: Human Biology
Topic: Bacteremia in humans
Replies: 1
Views: 1030

Help! "Unknown Bacteria" I have no idea where to look =T

Hi, I have been having a hard time figuring out my unknown bacteria. I honestly thought all of my test results added up to Staphylococcus Aureus, but my oxidase test read positive. My results were: 1. Gram- + 2. Morph- Coccus, cluster 3. Lactose fermentation- acid, yellow + 4. Gelatin ...

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by stephanie1234
Mon Dec 03, 2012 4:44 am
Forum: Microbiology
Topic: Help! "Unknown Bacteria" I have no idea where to look =T
Replies: 1
Views: 2438

How to create a science project about acne?

... be really hard to test acne the way you are thinking. When you culture bacteria from skin, you have to use several, let's call them dichotomous keys, to determine what kind of bacteria you are looking at. Gram stain is the first step, but then cell shape, cluster patterns, etc all ...

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by tmbirkhead
Sun Sep 23, 2012 5:25 am
Forum: Human Biology
Topic: How to create a science project about acne?
Replies: 2
Views: 2953

Growth on metal pot?!

... specific pathogens rather than numbers (some foods carry milions of bacteria per gram) and such pathogens are well characterized and documented. I refer you to the US FDA "Bad ...

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by JorgeLobo
Sun Jun 10, 2012 5:37 pm
Forum: Microbiology
Topic: Growth on metal pot?!
Replies: 24
Views: 7693
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