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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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From which organism agar agar is extracted?
red algae Agar agar is a malay term meaning red algae. This algae which agar is extracted lives in the ocean around Malaysia
Why cant blood agar used in catalase test?
Care must be taken if testing an organism cultured on a medium containing blood because catalase is present in red cells. If any of the blood agar is removed with the colony, a false positive reaction will occur. It is usually recommended, therefore that catalase testing be performed from a blood-free culture medium such as nutrient 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
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.
What is sheeps blood agar made of?
Sheeps blood
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)
If an organism can grow on both a nutrient agar and a MacConkey Agar on which would you expect it to grow better?
The organism would be expected to grow better in nutrient agar. Nutrient agar is rich in nutrients and microorganisms grow well when there is availability of nutrients.
From which organism agar agar is extracted?
red algae Agar agar is a malay term meaning red algae. This algae which agar is extracted lives in the ocean around Malaysia
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.
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.
Why cant blood agar used in catalase test?
Care must be taken if testing an organism cultured on a medium containing blood because catalase is present in red cells. If any of the blood agar is removed with the colony, a false positive reaction will occur. It is usually recommended, therefore that catalase testing be performed from a blood-free culture medium such as nutrient agar.
A common medium used for growing fastidious bacteria is?
Blood Agar, and trypticase soy agar grows semi fastidious
What is the purpose of stabbing the blood agar?
By stabbing the blood agar, the hemolysis will be easier to see and identify.
Alpha hemolytic reaction in blood agar culture?
This occurs when there is partial damage to the red blood cells. The plate will turn green. This is characteristic of streptococcus pneumonia.
Lactosefermenting bacteria in maconkey agar?
if maconkey agar lemon yellow color indacates what???
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.
