WorksheetsThe Chain of Infection
Total questions: 15
Worksheet time: 8mins
Which pairing correctly matches an infectious agent with an example shown?
Protozoa with Pseudomonas aeruginosa
Bacteria with Candida albicans example
Virus with Hepatitis B example
Fungi with E. coli example
A nurse suspects a reservoir for a patient’s infection. Which source is best classified as inanimate?
Bloodstream carrying Hepatitis B virus
Symptomatic human with viral hepatitis
Mosquito transmitting malaria parasite
Reusable equipment on a ward
During an outbreak of dengue, what is the primary mechanism moving the virus from one host to another?
Airborne droplet nuclei in closed spaces
Direct contact via broken skin surfaces
Gastrointestinal spread through contaminated saliva
External mechanical transfer by mosquito stings
Which scenario best illustrates indirect contact transmission in a clinical setting?
Talking near a patient while wearing a mask
Assisting with feeding using clean utensils
Sharing a contaminated commode chair between patients
Holding a patient’s hand during reassurance
A pathogen enters a host via transplacental entry. Which route describes this portal of entry?
Penetrating skin through needlestick injury
Swallowing contaminated food or water
Crossing from maternal blood to the fetus
Breathing droplets into the lungs
A nurse prepares instruments for a procedure. Which action maintains asepsis most effectively in this scenario?
Wiping instruments with tap water only
Sterilizing the instruments before use
Placing used instruments in a covered tray
Gloving without handwashing beforehand
Which statement best differentiates medical asepsis from surgical asepsis?
Medical asepsis reduces microorganisms; surgical asepsis eliminates them
Both approaches eliminate all microorganisms on surfaces
Medical asepsis eliminates all microorganisms; surgical asepsis reduces them
Both approaches only clean visible debris without reducing microbes
A patient is scheduled for an invasive procedure in the operating room. Which PPE and environment combination reflects surgical asepsis?
Sterile equipment, clean gowns, and optional cap
Clean disposable gowns, non‑sterile gloves, and no cap
Sterile equipment, sterile gowns, and a cap
Clean equipment, sterile gloves, and uncovered hair
Which scenario correctly requires surgical asepsis rather than medical asepsis in a hospital setting?
Nasogastric feeding in the general ward
Oral suctioning for a stable patient
Routine handwashing before vital signs
Central line insertion in the theatre
What is the main aim of antimicrobial stewardship programs?
Maximize patient access to over-the-counter antibiotics
Increase broad-spectrum antibiotic availability
Reduce antibiotic resistance through judicious use
Eliminate all microbial exposure in hospitals
Which activity characterizes MOH epidemiological investigations?
Rigorous interviews and field tracing of transmission
Forecasting elective surgery waitlists
Auditing hospital financial expenditures
Benchmarking international insurance premiums
Which component is emphasized in medical management for infectious diseases in Singapore?
Routine home isolation without testing
Delayed therapy to observe natural course
Exclusive reliance on traditional remedies
Early diagnosis and treatment with subsidies
A patient with suspected tuberculosis presents to a clinic. What is the immediate reporting obligation?
Report monthly after laboratory confirmation
Notify MOH within twenty-four hours
Wait until contact tracing concludes
Inform only the hospital infection committee
Which scenario best illustrates appropriate use of isolation facilities?
Training staff for financial compliance
Housing healthy travelers during holidays
Observing chronic non-infectious conditions
Managing mild cases at community care centers
Which combination reflects NCID’s integrated functions in Singapore?
Running sports events, funding arts programs
Treating patients, training staff, conducting research
Issuing visas, collecting taxes, managing trade
Organizing elections, setting school curricula
