Clinical Microbiology Questions and
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is clinical microbiology mainly concerned with?
✔✔ The study of microorganisms that cause human disease
Which types of organisms are studied in clinical microbiology?
✔✔ Bacteria, viruses, fungi, and parasites
What is a pathogen?
✔✔ A microorganism capable of causing disease
What is normal flora?
✔✔ Microorganisms that normally live in or on the human body
Why is normal flora important?
✔✔ It helps prevent infection by harmful microbes
What is the most common method for sterilisation in laboratories?
✔✔ Autoclaving
What temperature is commonly used in an autoclave?
1
,✔✔ 121°C
What is a culture medium?
✔✔ A substance used to grow microorganisms in the lab
What is agar?
✔✔ A solidifying agent used in culture media
Why is blood agar used in microbiology?
✔✔ To grow fastidious bacteria and observe hemolysis
What does hemolysis mean?
✔✔ Breakdown of red blood cells
What organism is commonly associated with beta hemolysis?
✔✔ Streptococcus pyogenes
What staining technique differentiates bacteria into two major groups?
✔✔ Gram staining
What color do Gram-positive bacteria appear after Gram staining?
✔✔ Purple
2
,What color do Gram-negative bacteria appear after Gram staining?
✔✔ Pink or red
What component is thicker in Gram-positive bacteria?
✔✔ Peptidoglycan layer
What is the function of a bacterial capsule?
✔✔ Protection from host immune response
What is a spore?
✔✔ A dormant, resistant bacterial structure
Which bacteria are known for spore formation?
✔✔ Bacillus and Clostridium species
What is aseptic technique?
✔✔ Procedures used to prevent contamination
What is an opportunistic pathogen?
✔✔ A microorganism that causes disease in weakened hosts
3
, What is the purpose of antimicrobial susceptibility testing?
✔✔ To determine effective antibiotics
What does antibiotic resistance mean?
✔✔ Ability of bacteria to survive antibiotic treatment
What is MRSA?
✔✔ Methicillin-resistant Staphylococcus aureus
What specimen is commonly used to diagnose urinary tract infections?
✔✔ Urine
What is bacteremia?
✔✔ Presence of bacteria in the bloodstream
What is septicemia?
✔✔ Systemic infection caused by bacteria in blood
What is a virus?
✔✔ An obligate intracellular infectious agent
Why can viruses not grow on artificial media?
4
Answers | Latest Version | 2025/2026 |
Correct & Verified
What is clinical microbiology mainly concerned with?
✔✔ The study of microorganisms that cause human disease
Which types of organisms are studied in clinical microbiology?
✔✔ Bacteria, viruses, fungi, and parasites
What is a pathogen?
✔✔ A microorganism capable of causing disease
What is normal flora?
✔✔ Microorganisms that normally live in or on the human body
Why is normal flora important?
✔✔ It helps prevent infection by harmful microbes
What is the most common method for sterilisation in laboratories?
✔✔ Autoclaving
What temperature is commonly used in an autoclave?
1
,✔✔ 121°C
What is a culture medium?
✔✔ A substance used to grow microorganisms in the lab
What is agar?
✔✔ A solidifying agent used in culture media
Why is blood agar used in microbiology?
✔✔ To grow fastidious bacteria and observe hemolysis
What does hemolysis mean?
✔✔ Breakdown of red blood cells
What organism is commonly associated with beta hemolysis?
✔✔ Streptococcus pyogenes
What staining technique differentiates bacteria into two major groups?
✔✔ Gram staining
What color do Gram-positive bacteria appear after Gram staining?
✔✔ Purple
2
,What color do Gram-negative bacteria appear after Gram staining?
✔✔ Pink or red
What component is thicker in Gram-positive bacteria?
✔✔ Peptidoglycan layer
What is the function of a bacterial capsule?
✔✔ Protection from host immune response
What is a spore?
✔✔ A dormant, resistant bacterial structure
Which bacteria are known for spore formation?
✔✔ Bacillus and Clostridium species
What is aseptic technique?
✔✔ Procedures used to prevent contamination
What is an opportunistic pathogen?
✔✔ A microorganism that causes disease in weakened hosts
3
, What is the purpose of antimicrobial susceptibility testing?
✔✔ To determine effective antibiotics
What does antibiotic resistance mean?
✔✔ Ability of bacteria to survive antibiotic treatment
What is MRSA?
✔✔ Methicillin-resistant Staphylococcus aureus
What specimen is commonly used to diagnose urinary tract infections?
✔✔ Urine
What is bacteremia?
✔✔ Presence of bacteria in the bloodstream
What is septicemia?
✔✔ Systemic infection caused by bacteria in blood
What is a virus?
✔✔ An obligate intracellular infectious agent
Why can viruses not grow on artificial media?
4
