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Streptococcus pneuomoniae

When this organism is tested on a blood agar plate it's colonies will be surrounded by a greenish discoloration due to alpha-hemolysis.

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Lactose fermentation mac conkey test which color indicate a positive test?

MacConkey agar is yellow (due to the lactose in the agar). When an organism consumes the lactose, the agar turns purple. Purple indicates a positive test. If the organism doesn't use the agar, the agar stays yellow.


Is blood agar enriched media?

yes, blood provide all essential nutrient for the growth of fastidious organism (org requiring more nutrient)


Why flurescent happen on kings B Agar media?

King B agar allows the production of fluoresceine (or pyoverdin), a yellow-green pigment that fluoresces under ultraviolet light in certain strains of Pseudomonas.


Does Chromobacterium violaceum pit blood agar?

No it does not pit blood agar I am curently studying Chromobcaterium violaceum and recently grew it on a sheep blood agar it did not pit it. Cv turned the agar a brown color.


If an organism can grow on both a nutrient agar and a MacConkey Agar on which would you expect it to grow better?

You would expect the organism to grow better on nutrient agar because it is a general-purpose medium that supports the growth of a wide range of organisms. MacConkey agar, on the other hand, contains inhibitors that selectively inhibit the growth of Gram-negative bacteria, so the organism may not grow as well on this medium.


Will Moraxella grow on maconkey agar?

Moraxella is a fastidious organism and may grow on MacConkey agar, but not as well as it would on media specifically designed for its growth, such as blood agar. MacConkey agar is selective for Gram-negative bacteria that ferment lactose, which may not support the growth of Moraxella well as it is usually non-lactose fermenting.


What is the purpose of stabbing the blood agar?

By stabbing the blood agar, the hemolysis will be easier to see and identify.


Does Haemophilus influenzae grow on blood agar?

Yes, Haemophilus influenzae can grow on blood agar.


What type of media is used for growing a culture from a throat specimen?

blood and chocolate agar plates as well as in universities laboratory Nutrient agar plates are also provided


A common medium used for growing fastidious bacteria is?

blood agar, as it provides essential nutrients and growth factors needed for the growth of fastidious bacteria. Additionally, the presence of blood in the agar helps to support the growth of these bacteria by providing additional nutrients.


What do yellow areas on the agar indicate?

yeet


Why have zone inhibition?

It is the area on an agar plate where growth of a control organism is prevented by an antibiotic usually placed on the agar surface. If the test organism is susceptable to the antibiotic, it will not grow where the antibioitic is.