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Avian Health > LECTURE 6: Cleaning and Disinfectants > Flashcards

LECTURE 6: Cleaning and Disinfectants Flashcards

*go over starred and underlined parts especially for this lecture

1
Q

TRUE or FALSE? Cleaning a disinfecting are the same thing?

A

FALSE

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2
Q

What is cleaning?

A

These are the steps of C&D that occur prior to
disinfection

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3
Q

What is the purpose of cleaning?

A

Remove “organic” matter to the best degree possible

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4
Q

What is disinfecting?

A

Actual application of a chemical/product that will eliminate
a certain % of remaining potential pathogens or
organisms (bacteria, fungi, viruses)

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5
Q

What are the 5 basic steps of cleaning?

A
  1. Pre-Cleaning
  2. Foaming with Soap
  3. Pressure rinsing
  4. Drying (yes that’s a step!)
  5. Application of disinfectant
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6
Q

What is the main goal of pre cleaning?

A

Remove organic matter and pathogens WITHOUT the aid of water

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7
Q

What are some examples of dry cleaning you can
think of for a poultry house?

A

Removal of litter (tractor or skid steer).
and shoveling fecal waste from baseboards.

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8
Q

What is the purpose of soap?

A

Break up dried organic matter

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9
Q

How is soap applied?

A

foamers

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10
Q

What is the ideal contact time for soap?

A

10-20 minutes

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11
Q

You are doing a 500 foot long barn. What
challenge might this be?

A

Don’t want soap to dry before rinsing! This reduces
the effectiveness of soap.

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12
Q

Why should surfaces be dry prior to disinfecting?

A

Disinfectant + water = dilution
Organic material in lift over water will inactivate the disinfectant

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13
Q

How can you aid the drying process?

A
  1. Squeegee pooled water (only on a concrete floor houses/areas)
  2. Utilize the house ventilation! Fans can be run over the course of a day or two, potentially even with added heat, to speed up the drying process.
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14
Q

What are the 2 major types of disinfectants?

A
  1. Liquids
  2. Foams
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15
Q

What might you need to be concerned about with
your disinfectant other than it’s efficacy?

A

Some disinfectants can be corrosive

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16
Q

What is scott’s rule of thumb?

A

80% cleaning and disinfecting should be done on the first 4 steps (pre cleaning) 20% effort should be applying the disinfectant

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17
Q

What are some challenges of live production C&D?

A
  1. High loads of organic mater
  2. Most disinfectants not designed for production uses
18
Q

What is required for effective C&D?

A

Hands on dirty work and effective cleaning

19
Q

What things are considered when choosing a disinfectant?

A
  1. Cost
  2. Water usage pH?
  3. Surface area to cover
  4. What you are tying to fight/prevent
20
Q

What are 6 different types of disinfectants?

A
  1. Phenols
  2. Cresols
  3. Quaternary Ammonium
  4. Aldehydes
  5. Peroxygens
  6. Halogens
  7. Combo Products
21
Q

What is the chemical makeup of phenols?

A

Six carbon ring with OH group attached

22
Q

What are some characterisitics of phenols?

A
  1. Residual activity
  2. Broad spectrum (EXECPT BACTERIAL SPORES)
  3. Best activity in presence of ORGANIC MATTER of the disinfectants
23
Q

What are some issues with phenols?

A
  1. Costly
  2. Efficacy is highly dependent on a number of factors
  3. Not great against clostridial diseases (spore formers)
  4. Causitc
24
Q

Quats are a _____.

A

Detergent similar to soap

25
Q

How does the chemical make up of quats effect the function?

A

+ charge and binds well to proteins and bacteria and denatures proteins and inhibit enzyme activity

26
Q

What are some highlights of quats?

A
  1. MAJOR disinfectant used in hatcheries
  2. Some residual activity
  3. Work well on cleaned and sealed concrete floors, non rusted metals, and non-porous surfaces
27
Q

What are some downsides of quats?

A
  1. Not suited for high organic load
    environments
  2. Very poor choice for any field
    applications where high organic matter
    is present (including vehicles)
28
Q

What is the residual effect of aldehydes?

A

VERY POOR

29
Q

What are formaldehyde characteristics?

A
  1. gaseous state
  2. carcinogen
  3. strict use of OSHA approved PPE
30
Q

What are glutaraldehyde characteristics

A
  1. liquid
  2. does not revert to formaldehyde
  3. can be used as a fogged disinfectant (STILL NOT IN GAS)
31
Q

What is the major halogen?

A

Bleach

32
Q

What are characteristics of bleach?

A
  1. Quick kill
  2. No residual activity
33
Q

Why is new solutions of bleach made every 24 hours?

A

Very short half life

34
Q

Bleach (chlorine) works best in what conditions?

A

Acidic BUT don’t mix acid with bleach for better effectiveness

35
Q

Iodine is used mostly as what?

A

Water supplements, seen used in foot baths

36
Q

TRUE or FALSE? Iodine is generally used as a disinfectant?

A

FALSE

37
Q

Peroxygens are most commonly used for what?

A

Products are most commonly used for drinker line
sanitation and hatcher humidity line sanitation

38
Q

What is the “pad”?

A

Dirt pad layer underneath the litter

39
Q

Can the pad be disinfected?

A

No

40
Q

What are some methods of treating “the pad”?

A
  1. SALT
  2. Acidic liquids and solid powders/granules
41
Q

Whats a short cut of cleaning and disinfecting that is commonly used in the industry?

A

practice of using the same sprayer/foamer for dual insecticide and disinfection. Will inactivate chemicals.

Avian Health (23 decks)

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