WorksheetsDisinfectants and Infection Control Quiz
Total questions: 20
Worksheet time: 10mins
Chemical disinfectants act mainly by
Stimulating immunity
Protein denaturation and membrane damage
DNA replication
Enhancing sporulation
Phenol coefficient test assesses efficacy of disinfectants against
Mycobacterium tuberculosis
Staphylococcus aureus
Salmonella typhi
E. coli
Rideal–Walker test uses which organism?
E. coli
Salmonella typhi
Staphylococcus aureus
Pseudomonas aeruginosa
Chick–Martin test differs from Rideal–Walker because it uses
No organic matter
Organic matter present
Higher temperature
Shorter exposure
Ideal chemical disinfectant should be
Highly toxic to humans
Inactive in organic matter
Stable and effective in organic matter
Expensive
Catheter-related bloodstream infection (CRBSI) is most commonly caused by
Viruses
Gram-positive cocci
Fungi only
Parasites
Most common organism causing CRBSI is
Escherichia coli
Staphylococcus epidermidis
Pseudomonas aeruginosa
Candida albicans
Primary route of CRBSI is
Contaminated infusate
Extraluminal colonization along catheter track
Hematogenous spread
Airborne contamination
Key preventive measure for CRBSI is
Routine catheter change
Hand hygiene and aseptic insertion
Antibiotic prophylaxis only
Heparin flushes
Biofilm formation on catheters contributes to
Reduced infection risk
Increased antimicrobial susceptibility
Persistence of infection
Immediate clearance
Chemical sterilants are used for
Heat-stable items
Living tissues
Heat-sensitive medical devices
Air sterilization
Commonly used high-level chemical sterilant is
Phenol
Glutaraldehyde
Chlorhexidine
Alcohol
Glutaraldehyde is effective against all EXCEPT
Vegetative bacteria
Mycobacteria
Viruses
Spores at low exposure
Peracetic acid is preferred because it
Leaves toxic residues
Is ineffective against spores
Acts rapidly and is sporicidal
Requires high temperature
Hydrogen peroxide plasma sterilization is effective at
High temperatures only
Low temperatures with rapid cycles
Only for liquids
Only for powders
Biomedical waste management aims to
Recycle all waste
Reduce hospital costs
Prevent infection and environmental hazard
Increase landfill use
Yellow color container is used for
Sharps waste
Glassware
Human anatomical and soiled waste
Plastic tubing
Red color container is used for
Human tissues
Contaminated recyclable plastics
Sharps
Glassware
White (translucent) container is used for
Soiled waste
Sharps
Expired medicines
Glassware
Blue container is used for
Human tissues
Plastic waste
Glassware and metallic implants
Microbiology waste
