ASCP Technologist in Microbiology 2

Question 1

Which staining technique is most commonly used to differentiate bacteria into two major groups?

Accepted Answer

Gram stain

Answer

Acid-fast stain

Answer

Wright stain

Answer

India ink

Question 2

What is the purpose of blood agar in microbiology?

Accepted Answer

To detect hemolysis patterns that help identify bacterial species

Answer

To selectively grow only gram-negative bacteria

Answer

To inhibit fungal growth

Answer

To test antibiotic susceptibility

Question 3

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

Accepted Answer

Escherichia coli

Answer

Staphylococcus aureus

Answer

Pseudomonas aeruginosa

Answer

Streptococcus pneumoniae

Question 4

What is the purpose of an antibiotic susceptibility test?

Accepted Answer

To determine which antibiotics will effectively inhibit or kill the pathogen

Answer

To identify the species of bacteria

Answer

To count bacteria in a specimen

Answer

To detect viral infections

Question 5

Which culture medium is selective for gram-negative bacteria?

Accepted Answer

MacConkey agar

Answer

Blood agar

Answer

Chocolate agar

Answer

Thioglycollate broth

Question 6

What does MRSA stand for, and why is it clinically significant?

Accepted Answer

Methicillin-resistant Staphylococcus aureus; resistant to beta-lactam antibiotics

Answer

Multi-resistant Streptococcus aureus; causes severe pneumonia

Answer

Macrolide-resistant Staphylococcus aureus; resistant to erythromycin only

Answer

Multi-resistant Salmonella; causes food poisoning