Gram Positive Cocci Flashcards Preview

Microbiology > Gram Positive Cocci > Flashcards

Flashcards in Gram Positive Cocci Deck (12)
Loading flashcards...
1
Q

Microorganism cocci gram (+) associated with endocarditis in IV drug users? What other infection is associated?

A

Staphylococcus epidermidis

Catheter and prosthetic device infection

2
Q

Which streptococcus strain is associated with glomerulonephritis?

A

Streptococcus pyogenes M12

3
Q

Superantigens used by streptococcus pyogenes? Associated with which disease?

A
Exotoxins A-C (pyogenic or erythrogenic)
Scarlet fever (fever and rash)
4
Q

Acute suppurative disease of streptococcus pyogenes (group A)

A

Impetigo (pyoderma), scarlet fever, pharyngitis

*also cellulitis/necrotizing fascitis, puerperal fever, lymphangitis, erysipelas

5
Q

Major pathogenic factors of streptococcus agalactiae? Disease associated.

A

Capsule, Beta-hemolysin, CAMP factor

Neonatal septicemia and meningitis

6
Q

Major virulence factor of streptococcus pneumoniae. Why is it important?

A

Polysaccharide capsule

Asplenia ▶️ ⬆️ risk of septicemia

7
Q

Diseases caused in adult age by streptococcus pneumoniae

A

Lobar typical pneumonia
Meningitis

*most common cause of these diseases in adults

8
Q

Diseases in children most commonly caused by streptococcus pneumoniae

A

Ottis media, sinusitis

9
Q

Which is the most specifically test for streptococcus pneumoniae? What sample do you need? What do you look for?

A

Latex particle agglutination ▶️ capsular antigen in CSF

10
Q

Virulence factor of streptococcus viridans. Diseases that can cause.

A

Dextran (biofilm) ▶️ adherence on teeth and damaged heart valves (vegetations - immune system protection)
Dental caries, subacute infective endocarditis

11
Q

Mainly diseases associated with enterococcus faecalis/faecium. Conditions that predispose them.

A

Subacute infective endocarditis ▶️ elderly males, follow GI/GU surgery, previous damage heart valve
Urinary and biliary tract infections ▶️ nursing home, hospitals, catheter associated, suspect if AB doesn’t work

12
Q

Exact subspecie of streptococcus viridans group that cause subacute endocarditis.

A

Streptococcus sanguinis