MicroBiology Chapter 13 Quiz
MRSA stands for methicillin-resistant Staphylococcus aureus, which is a strain of S. aureus that is unaffected by methicillin. Select one: True False
True
Staphylococcus aureus is responsible for toxic shock syndrome and scalded skin syndrome. Select one: True False
True
Which of the following Staphylococcus species is/are coagulase positive? (check ALL that apply) Select one or more: a. Staphylococcus epidermidis b. Staphylococcus aureus c. Staphylococcus saprophyticus d. Staphylococcus haemolyticus e. Staphylococcus auricularis
b. Staphylococcus aureus
Match the organism with the type of infection it is commonly associated with. 1. Infections in those who are immunocompromised 2. Nosocomial infections 3. Toxic shock syndrome 4. UTIs in sexually active young women
1. Micrococcus sp. 2. Staphylococcus epidermis 3. Staphylococcus aureus 4. Staphylococcus saprophyticus
Suppose that you have done a Gram stain on a bacterial organism and have found that it is Gram positive cocci. You suspect that it is Staphylococcus aureus, so you perform a catalase test. The result of the catalase test is positive. Next, you do a coagulase test, and find that it is negative. Below is a summary of all of your results. Gram positive Catalase positive Coagulase negative Is this organism Staphylococcus aureus? Select one: a. No b. Yes
A. No
The presence of which gene gives Staphylococcus aureus methicillin resistance? Select one: a. SCCmec b. PBP2A c. mecA d. mecB
C. mecA
How is Staphylococcus aureus transmitted? Select one: a. Contaminated water b. Insect bites c. Fecal-oral route d. Person-to-person
D. Person-to-person
Which of the following characteristics is/are true of Staphylococcus aureus? (check ALL that apply) Select one or more: a. Catalase positive b. Aerobic or facultatively anaerobic c. White to yellow colonies d. Gram positive cocci e. Gram negative bacilli
a. Catalase positive b. Aerobic or facultatively anaerobic c. White to yellow colonies d. Gram positive cocci
Which of the following Staphylococcus species is/are coagulase negative? (check ALL that apply) Select one or more: a. Staphylococcus epidermidis b. Staphylococcus aureus c. Staphylococcus auricularis d. Staphylococcus saprophyticus e. Staphylococcus haemolyticus
a. Staphylococcus epidermidis c. Staphylococcus auricularis d. Staphylococcus saprophyticus e. Staphylococcus haemolyticus
Which toxins does Staphylococcus aureus produce? (check ALL that apply) Select one or more: a. Omega toxin b. Beta toxin c. Alpha toxin d. Gamma toxin e. Delta toxin
b. Beta toxin c. Alpha toxin d. Gamma toxin e. Delta toxin