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If you observed growth of gram negative organisms on the PEA plate you inoculated does the negate the usefulness of PEA as a selective medium why or why not?
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What selective growth media is best suited for isolation of coliform bacteria?
MacConkey's agar is a selective growth media that is best suited for isolation of coliform bacteria. This bacterial is red and is gram negative. The agar plate inhibits the growth of gram positive organisms and allows gram negative organisms to grow.
Is a non motile organism over inoculation of the slide with organisms a false negative?
If a slide is over-inoculated, it means that there are too many samples on one slide. This means that it can give a false negative regarding the motility of the organism in question.
What is the negative control in a fermentation lab?
Howdy there! Negative control for a fermentation lab should have the substrate in the vessel, and it should be very sterile so no contamination doesn't happen (make sure to label them vessels well). Secondly, the negative control vessel should not be inoculated with the microbe, like yeast, in it at all because you want no response. If there is a response, it could be contamination or you mistakenly inoculated with the microbe which fermented the substrate. Hope this helped you plenty! 😄
EMB is a selective medium Is it also a defined or an undefined medium Why is that formulation desirable?
EMB is an undefined selective/differential medium. It contains aniline dyes (methylene blue and eosin), which inhibit the growth of Gram-positive bacteria selecting for Gram-negative bacteria. EMB also contains lactose which makes the media differential based on an organisms ability to ferment lactose
What is the alteration in aquatic bodies which has a negative effect on apnatic organisms?
noise pollution
Why 7.5 percent sodium chloride agar is selective media?
Because 7.5% NaCl agar inhibits gram negative organisms from growing, and is "selective" in that only gram positive organisms can grow in this type of agar.
What selective growth media is best suited for isolation of coliform bacteria?
MacConkey's agar is a selective growth media that is best suited for isolation of coliform bacteria. This bacterial is red and is gram negative. The agar plate inhibits the growth of gram positive organisms and allows gram negative organisms to grow.
Is a non motile organism over inoculation of the slide with organisms a false negative?
If a slide is over-inoculated, it means that there are too many samples on one slide. This means that it can give a false negative regarding the motility of the organism in question.
Can selective connotations be negative?
Yes, they can be negative or positive.
What is the negative control in a fermentation lab?
Howdy there! Negative control for a fermentation lab should have the substrate in the vessel, and it should be very sterile so no contamination doesn't happen (make sure to label them vessels well). Secondly, the negative control vessel should not be inoculated with the microbe, like yeast, in it at all because you want no response. If there is a response, it could be contamination or you mistakenly inoculated with the microbe which fermented the substrate. Hope this helped you plenty! 😄
What could be a selective medium in eliminating gram positive and gram negative from a mixture?
streptococ
EMB is a selective medium Is it also a defined or an undefined medium Why is that formulation desirable?
EMB is an undefined selective/differential medium. It contains aniline dyes (methylene blue and eosin), which inhibit the growth of Gram-positive bacteria selecting for Gram-negative bacteria. EMB also contains lactose which makes the media differential based on an organisms ability to ferment lactose
Is glucose salts agar selective?
Glucose Salts Agar (GSA) is a selective agar that selects for gram-negative bacteria only. This means that no gram-positive bacteria will be able to grow on it.
What is negative lactose fermentative organisms?
these are those bacteria which are not able to ferment lactose sugar hence are called non lactose fermenting or negative lactose fermenting organisms.
What types of organisms are subjected to Negative Staining Technique?
Bacteria .
Do Gram negative organisms grow on MSA plates?
Yes
What is the significance of eugenics?
It is a social philosophy for improving the genetics of a population by selective breeding. Those in power deciding what traits are positive and which are negative.
