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32 Cards in this Set
- Front
- Back
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What are the 5 Gram + Cocci? |
1) Staphylococcus aureus 2) Streptococcus pyogenes 3) Streptococcus pneumoniae 4) Streptococcus agalactiae 5) Viridans Streptococci |
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What does Staphylococcus aureus cause? |
Skin infections, toxic shock syndrome, and MRSA |
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Examples of Staphylococcus aureus skin infections |
Furuncles (boils), carbuncles, impetigo, and scalded skin syndrome. |
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Toxic Shock Syndrome |
Has the most virulence factors of any pathogen, found on the skin and mucous membranes, can therefore withstand high salt conditions, and temperature and pH fluctuations. |
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Is Staphylococcus aureus catalase negative or positive? |
Catalase positive |
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Is Staphylococcus aureus coagulase negative or positive? |
Coagulase positive |
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Is staphylococcus aureus alpha or beta-hemolytic |
Beta-hemolytic |
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Methicillin-resistance S. Aureus (MRSA) |
Difficult to treat, have to use vancomycin, some isolates are even VRSA |
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Streptococcus pyogenes causes |
Strept throat/pharyngitis, scarlet fever, and rheumatic fever |
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What Group is Streptococcus pyogenes |
Group A |
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Strept throat/pharyngitis |
Scarlet fever due to erythrogenic toxin |
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Is Streptococcus pyogenes catalase negative or positive? |
Catalase negative |
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Is streptococcus pyogenes alpha or beta-hemolytic? |
Beta-hemolytic |
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What does Streptococcus pyogenes grow on? |
Grows on blood agar. Is fastidious |
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How is Streptococcus pyogenes treated? |
Treated with penicillin |
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What does Streptococcus pneumoniae cause? |
60-70% of bacterial pneumonia, and causes otitis media in young children |
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What does streptococcus pneumoniae grow on? |
Grows on blood agar. The pneumococcus Is fastidious |
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Is streptococcus pnemoniae alpha or beta-hemolytic? |
Alpha-hemolytic |
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How and where does streptococcus pneumoniae appear? |
Appear as lancet-shaped diplococci in sputum smear of pneumonia patient |
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What is streptococcus pneumoniae's major virulence factor? |
Capsule |
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Can streptococcus pneumoniae be treated? |
Pneumococcal vaccine available |
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What group is streptococcus agalactiae in? |
Group B |
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What does streptococcus agalactiae cause? |
Meningitis in newborns |
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Who is tested for streptococcus agalactiae? |
Pregnant women are tested for carriage of this organism due to the risk of infection to newborns |
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How is streptococcus agalactiae detectef? |
Detect by positive CAMP test. |
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What does streptococcus agalactiae grow on? |
Grow on blood agar Is fastidious |
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How is streptococcus agalactiae treated? |
Treated with penicillin |
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Where does Viridans streptococci present? |
Present in the oral cavity |
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What does Viridans streptococci cause? |
Can cause dental caries |
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Why can Viridans streptococci cause more serious infections in heart patients? |
They take antibiotics prophylatically for invasive dental work |
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What are the two Gram - Cocci? |
1) Neisseria meningitidis 2) Neisseria gonorrhoeae |
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What does Neisseria meningitidis cause? |
Epidemic meningitis |
