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What positive role may be played by the nonpathogenic streptococci normally found between the teeth and in the gingival crevice?
Wiki User
∙ 11y ago
The normal flora occupy available colonization sites which makes it more difficult for other microorganisms (nonindigenous species) to become established. Also, the oral flora contribute to host nutrition through the synthesis of vitamins, and they contribute to immunity by inducing low levels of circulating and secretory antibodies that may cross react with pathogens. Finally, the oral bacteria exert microbial antagonism against nonindigenous species by production of inhibitory substances such as fatty acids, peroxides and bacteriocins.
Wiki User
∙ 11y ago
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If you have isolated a gram-positive coccus from a throat culture that you cannot identify as staphlycocci or streptococci A test for one enzyme can be used to distinguish quickly between these bacter?
The enzyme catalase is present in staphylococci but not streptococci.
What organisms can grow on horse blood agar?
streptococci like S.mutans grow on this medium.. may be other anaerobic pathogenic streptococci(animals) also grow in this medium . Listeria monocytogenes, a gram positive foodborne pathogen, also grows very well on this medium and may actually show better hemolysis zones than when grown on regular sheep blood agar.
Is steel positively charged or negatively charged?
It should normally be neutral, that is, it should not have a significant charge, positive or negative.
What causes streptococcus?
Streptococcus is a gram-positive bacteria that causes various illnesses in human bodies. To answer the question briefly, the streptococcus is caused by other streptococcus, which asexually reproduces by binary fission to get another streptococcus. To answer the question regarding the disease, the disease is simply caused by the bacteria.
Is Beryllium a positive or negative ion?
Normally positive. However under the right conditions it could be either, as could anything.
What enzyme distinguishes staphylococci from streptococci?
Catalase. Staphylococci are catalase positive. Streptococci are catalase negative.
Streptococci bacteria causing strep throat are in what group?
Gram positive cocci - arranged in chains
If you have isolated a gram-positive coccus from a throat culture that you cannot identify as staphlycocci or streptococci A test for one enzyme can be used to distinguish quickly between these bacter?
The enzyme catalase is present in staphylococci but not streptococci.
All test results for streptococcus pyogenes?
Streptococcus pyogenes is a gram-positive bacterium caused by infections. It is tested by a catalase test that will show either a positive or negative reaction to streptococci.
Which is bigger negative or positive?
Positive is normally taken to be bigger.
What colour is positive and neg in a car?
Normally Positive (+) is RED and Negative (-) is Black.
What color is the positive car battery terminal?
Positive is normally red.
A Father with A positive blood type and a mother with O positive blood type will have a baby with what blood type?
The baby will normally be A positive.
What does red mean positive or negative?
normally the lightest color is the positive but that doesnt matter because i had stuff in which the black cable is the positive...
Which wires are the positive and negative power window wires on a 2001 Nissan Frontier?
Positive is normally red and negative is normally black or green. Test them with a volt meter to be sure.
What organisms can grow on horse blood agar?
streptococci like S.mutans grow on this medium.. may be other anaerobic pathogenic streptococci(animals) also grow in this medium . Listeria monocytogenes, a gram positive foodborne pathogen, also grows very well on this medium and may actually show better hemolysis zones than when grown on regular sheep blood agar.
How can you tell which is positive lead on a battery charger?
It is normally red.
