2b. Staphylococcus Flashcards
What type of Gram stain are Staphylococcus?
G(+).
Are all Staphylococcus catalase positive?
Yes.
What is the general shape of Staphylococcus?
Cocci arranged in clusters.
Which species of Staphylococcus is the one responsible for infective endocarditis (dominant cause in IV drug users), abscesses, toxic shock syndrome, gastroenteritis, and suppurative lesions?
Staphylococcus aureus.
Which species of Staphylococcus is the one responsible for Catheter and prosthetic device and infections and endocarditis in IV drug users?
Staphylococcus epidermidis.
Which species of Staphylococcus is the one responsible for urinary tract infections in newly active adolescent women?
Staphylococcus saprophyticus.
Which species of Staphylococcus has the ability to make biofilm?
Staphylococcus epidermidis.
Which species of Staphylococcus is resistant to novobiocin?
Staphylococcus saprophyticus.
Which species of Staphylococcus is susceptible to novobiocin?
Staphylococcus epidermidis.
Which species of Staphylococcus is coagulase positive and beta-hemolytic?
Staphylococcus aureus.
Which species of Staphylococcus is salt tolerant?
Staphylococcus aureus.
How does Staphylococcus aureus transmit?
Via hands and sneezing.
What does TSST-1 do?
Causes toxic shock syndrome. Decreases normal liver clearance of endotoxin; superantigen nonspecifically activates large number of T helper cells without processed antigen.
What does coagulase do?
Convert fibrinogen to a fibrin clot.
What is MRSA?
Methicillin-resistant S. aureus. Is commonly resistant to all antibiotics except vancomycin and fusidic acid.
