ASCP Microbiology

Question 1

Which organism is the most common cause of community-acquired urinary tract infections?

Accepted Answer

Escherichia coli

Answer

Klebsiella pneumoniae

Answer

Staphylococcus saprophyticus

Answer

Enterococcus faecalis

Question 2

A Gram stain showing gram-positive cocci in clusters is most consistent with:

Accepted Answer

Staphylococcus species

Answer

Streptococcus pneumoniae

Answer

Enterococcus faecalis

Answer

Listeria monocytogenes

Question 3

Which test differentiates Staphylococcus aureus from coagulase-negative staphylococci?

Accepted Answer

Coagulase test

Answer

Catalase test

Answer

Oxidase test

Answer

Urease test

Question 4

Which medium is selective for gram-negative enteric pathogens like Salmonella and Shigella?

Accepted Answer

Hektoen enteric (HE) agar

Answer

Blood agar

Answer

Chocolate agar

Answer

Thayer-Martin agar

Question 5

The CAMP test is used to identify which organism?

Accepted Answer

Streptococcus agalactiae (Group B Strep)

Answer

Listeria monocytogenes

Answer

Clostridium perfringens

Answer

Corynebacterium diphtheriae

Question 6

Which fastidious organism requires X (hemin) and V (NAD) factors and causes meningitis in children?

Accepted Answer

Haemophilus influenzae

Answer

Neisseria meningitidis

Answer

Streptococcus pneumoniae

Answer

Listeria monocytogenes