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35 Cards in this Set
- Front
- Back
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What is the morphology and staining of strep?
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Gram-positive
Cocci |
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What type of ultrastructure does Steptococci tend to form?
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Chains
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Is Steptococci catalse positive or negative?
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Negative
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Under which oxygen conditions can Steptococci grow?
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Both!
Aerobically and anaerobically |
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Steptococus pyogenes grows in what part of the body?
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Skin
Mucous membranes |
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Steptococcus viridans grows in what part of the body?
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Oropharync
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Enterobacteriae faecalis grows in what part of the body?
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GI tract
GU tract |
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Steptococcus agalactiae grows in what part of the body?
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Lower GI tract
Female GU tract |
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What organism of the natural reservoir for Steptococci?
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Humans
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What is does beta hemolysis show up like on a blood agar plate?
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Clear zone
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What is does alpha hemolysis show up like on a blood agar plate?
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Green zone
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What is does gamma hemolysis show up like on a blood agar plate?
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No hemolysis
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What types of streptococci perform beta hemolysis?
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Group A (pyogenes)
Group B (agalctiae) |
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What tyeps of streptococci perform alpha hemolysis?
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S. pneumoniae
Enterococci S. bovis |
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What bateria is associated with neonatal meningitis?
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S. agalctiae
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What disease is S. agalctiae associated with?
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Neonatal meningitis
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What is the diagnostic culturing feature of Enterococcus faecalis?
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Grows in high NaCl
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What diseases is Enterococcus faecalis associated with?
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Endocarditis
UTI Biliary tract infection |
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What bacteria can cause endocarditis, UTIs, and biliary tract infections?
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Enterococcus faecalis
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S. Viridans causes what kinds of diseases?
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Dental caries
Endocarditis |
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Endocarditis secondary to dental caries can be caused by what streptococcus species?
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Viridans
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Is S. pneumonia bile soluble or insoluble?
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Soluble
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What are pyogenic/supparative conditions can Group A Streptococcus cause?
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Pharyngitis
Impetigo |
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What pyrogenic conditions can Group A Streptococcus cause?
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Scarlet fever
Toxic shock syndrome (TSS) Puperal fever Sepsis |
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What immunologic conditions can Group A Streptococcus cause?
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Rheumatic fever
Acute glomerulonephritis |
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What are the virulence factors of Group A Streptococcus?
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C5a peptidase
Fibronectin binding proteins M-protein Superantigens! |
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What is the activity of F protein in this bacteria?
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Group A Streptococcus
Binding to respiratory epithelium |
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What is the activity of the C5a peptidase in this bacteria?
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Group A Streptococcus
Cleaving of the C5a; destroying C5a chemotactic activity |
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What is the activity of M protein in this bacteria?
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Group A Streptococcus
Sequestering H factor to block C3 maturation, disrupting the alternative complement pathway |
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What sort of exterior is on Group A Streptococcus?
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Hyaluronic acid capsule
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What is the function of the hyaluronic acid capsule in this organism?
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Group A Streptococcus
Antiphagocytic Host mimicry |
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What is the mechanism for variation in the M protein in this bacteiral species?
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Group A Streptococcus
"Slip strand mispairing" Repeats on the end of genes which cause the formation of different lengths of proteins |
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What are some digestive enzymes secreted by Group A Streptococcus that help it to spread throughout the tissues?
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Hyaluronidase
Streptokinase DNasess A-D SPE B - cysteine protease |
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What is a major determinant if Group A Streptococcus is able to penetrate deep into human tissue?
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Capsule!
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What are some of the Group A Streptococcus systemic toxins?
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SpeA, SpeC
Superantigens |
