Cleaning and Disinfection Final Exam with all Correct & 100%
Verified Answers |Latest Version |Already Graded A+
Cleaning and disinfection definition ✔Correct Answer--involves the use of physical or
chemical processes to reduce, remove, inactivate, or destroy
pathogenic microorganisms.
Cleaning definition ✔Correct Answer--involves the removal of visible organic and inorganic
matter (e.g.,
soil, dirt, debris, salts, oils, blood) from objects or surfaces.
Disinfection definition ✔Correct Answer--involves the destruction of microorganisms, but not
usually
spores, on inanimate surfaces or objects. Disinfection is not sterilization!
Sterilization definition ✔Correct Answer--describes a process that destroys or eliminates all
forms of microbial life,
including spores
What do disinfection methods involve? ✔Correct Answer--the use of physical (e.g., heat or
ultraviolet light) or
chemical (e.g., disinfectants) processes to reduce, inactivate, or destroy pathogenic
microorganisms.
Why is cleaning and disinfection important (i.e., colonized or infected patient)? ✔Correct
Answer--Contaminate surfaces > healthcare personnel's hands > susceptible patient > colonized
or infected patient
Infectious disease cycle and where can you use C/D to break the cycle ✔Correct Answer--
Infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host
**Infectious agent
**Mode of transmission
Most effective to least effective C/D methods ✔Correct Answer--1. Elimination - physically
removing the hazard
2. Substitution - replace the hazard
3. Engineering controls - isolate people from the hazard
4. Administrative controls - change the way people work
5. PPE - protect the worker with personal protective equipment
Where should C/D practices be applied? ✔Correct Answer--Clinics/Hospitals
, Farms - premises, vehicles, staff, equipment (need to be thinking about all possible vectors of
disease)
Processing plants
Laboratories/Biocontainment facilities
Emergency response/infectious disease outbreaks
Considerations for C/D product selection ✔Correct Answer--1. What am I C&Ding? - organic
load, surface topography, value, material (i.e, porous surfaces, with cracks, holds manure/mud)
2. What pathogen? - susceptibility to chemical disinfectants (ex. Fungal spores-measures point
for true sterilization)
3. What is in the environment I am cleaning? - Ph, humidity, temperature, water hardness, other
chemicals, people/animals
4. What are the specifications of my available of my available C&D products - concentration
(static vs cidal, is more better), method of application, cost, shelf life, toxicities,
corrosiveness/staining, sensitivity to organic material, contact time, label claims)
What are label claims primarily determined by? ✔Correct Answer--Three test microorganisms
- Staphylococcus aureus, salmonella cholerasuis, and pseudomonas aerguinosa
What is limited efficacy label claims? ✔Correct Answer--A claim of disinfection or germicidal
activity against ONE specific microorganism group (e.g., gram negative or gram positive. Gram
positive designation comes from effectiveness against staphylococcus aureus, while gram-
negative bacteria claims must be effective against salmonella cholerasuis. The label must specify
the group against which the product is effective
What is general-purpose or broad-spectrum label claims? ✔Correct Answer--A claim of
effectiveness against gram positive AND gram negative bacteria. This claim must be supported
by efficacy testing against staphylococcus aureus and salmonella cholerasuis
What are hospital or medical environmental label claims? ✔Correct Answer--Must be
supported by efficacy testing against S. Aureus AND S. Cholerasuis but AlSO efficacy against the
nosocomial bacterial pathogens, Psuedomonas aeruginosa
Are claims against pathogenic fungi or other microorganisms required? ✔Correct Answer--
They are permitted but not required on the label following standardized testing procedures
Who regulates chemical disinfectants in the US? ✔Correct Answer--the US EPA under Federal
Insecticide, Fungicide, and Rodenticide Act (FIFRA)
Disinfectant categories ✔Correct Answer--Alcohols, alkalis, aldehydes, halogens: chloride,
halogens: iodine, peroxygen compounds, phenols, quaternary ammonium compounds
Alcohol mechanism of action ✔Correct Answer--Precipitates proteins; denatures lipids
Verified Answers |Latest Version |Already Graded A+
Cleaning and disinfection definition ✔Correct Answer--involves the use of physical or
chemical processes to reduce, remove, inactivate, or destroy
pathogenic microorganisms.
Cleaning definition ✔Correct Answer--involves the removal of visible organic and inorganic
matter (e.g.,
soil, dirt, debris, salts, oils, blood) from objects or surfaces.
Disinfection definition ✔Correct Answer--involves the destruction of microorganisms, but not
usually
spores, on inanimate surfaces or objects. Disinfection is not sterilization!
Sterilization definition ✔Correct Answer--describes a process that destroys or eliminates all
forms of microbial life,
including spores
What do disinfection methods involve? ✔Correct Answer--the use of physical (e.g., heat or
ultraviolet light) or
chemical (e.g., disinfectants) processes to reduce, inactivate, or destroy pathogenic
microorganisms.
Why is cleaning and disinfection important (i.e., colonized or infected patient)? ✔Correct
Answer--Contaminate surfaces > healthcare personnel's hands > susceptible patient > colonized
or infected patient
Infectious disease cycle and where can you use C/D to break the cycle ✔Correct Answer--
Infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, susceptible host
**Infectious agent
**Mode of transmission
Most effective to least effective C/D methods ✔Correct Answer--1. Elimination - physically
removing the hazard
2. Substitution - replace the hazard
3. Engineering controls - isolate people from the hazard
4. Administrative controls - change the way people work
5. PPE - protect the worker with personal protective equipment
Where should C/D practices be applied? ✔Correct Answer--Clinics/Hospitals
, Farms - premises, vehicles, staff, equipment (need to be thinking about all possible vectors of
disease)
Processing plants
Laboratories/Biocontainment facilities
Emergency response/infectious disease outbreaks
Considerations for C/D product selection ✔Correct Answer--1. What am I C&Ding? - organic
load, surface topography, value, material (i.e, porous surfaces, with cracks, holds manure/mud)
2. What pathogen? - susceptibility to chemical disinfectants (ex. Fungal spores-measures point
for true sterilization)
3. What is in the environment I am cleaning? - Ph, humidity, temperature, water hardness, other
chemicals, people/animals
4. What are the specifications of my available of my available C&D products - concentration
(static vs cidal, is more better), method of application, cost, shelf life, toxicities,
corrosiveness/staining, sensitivity to organic material, contact time, label claims)
What are label claims primarily determined by? ✔Correct Answer--Three test microorganisms
- Staphylococcus aureus, salmonella cholerasuis, and pseudomonas aerguinosa
What is limited efficacy label claims? ✔Correct Answer--A claim of disinfection or germicidal
activity against ONE specific microorganism group (e.g., gram negative or gram positive. Gram
positive designation comes from effectiveness against staphylococcus aureus, while gram-
negative bacteria claims must be effective against salmonella cholerasuis. The label must specify
the group against which the product is effective
What is general-purpose or broad-spectrum label claims? ✔Correct Answer--A claim of
effectiveness against gram positive AND gram negative bacteria. This claim must be supported
by efficacy testing against staphylococcus aureus and salmonella cholerasuis
What are hospital or medical environmental label claims? ✔Correct Answer--Must be
supported by efficacy testing against S. Aureus AND S. Cholerasuis but AlSO efficacy against the
nosocomial bacterial pathogens, Psuedomonas aeruginosa
Are claims against pathogenic fungi or other microorganisms required? ✔Correct Answer--
They are permitted but not required on the label following standardized testing procedures
Who regulates chemical disinfectants in the US? ✔Correct Answer--the US EPA under Federal
Insecticide, Fungicide, and Rodenticide Act (FIFRA)
Disinfectant categories ✔Correct Answer--Alcohols, alkalis, aldehydes, halogens: chloride,
halogens: iodine, peroxygen compounds, phenols, quaternary ammonium compounds
Alcohol mechanism of action ✔Correct Answer--Precipitates proteins; denatures lipids
