Streptoccoci Viridans Flashcards

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1
Q

all streptococci are what gram?

A

positive

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2
Q

all streptococci are catalase negative or positive?

A

negative

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3
Q

streptococci viridans is alpha, beta or gamma hemolytic?

A

alpha hemolytic

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4
Q

where can strep. viridans be found normally in the body?

A

in the oropharynx

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5
Q

is strep viridans bile soluble?

A

no

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6
Q

what two characteristics differentiate strep viridans from strep pneumoniae?

A

optochin resistant

not bile soluble

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7
Q

how does strep viridans look under the mircroscope?

A

chains

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8
Q

What is an example of strep viridans?

where do we find it?

A

strep mutans

we find it in the mouth, and is responsible for caries and dental plaque by producing acid

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9
Q

strep viridans is the most common cause of what?

A

subacute endocarditis

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10
Q

what is the treatment for strep viridans caused subacute endocarditis?

A

penicillin G and aminoglycoside

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11
Q

how can strep viridans be prevented?

A

through prophylactic antibiotics during dental work with patients with previous damage to the heart valves

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12
Q

what bacteria can be found in the throat?

A

strep viridans

strep pneumoniae

nontypeable haemophilus influenza

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