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sop for Disinfectant Efficacy Test

sop for Disinfectant Efficacy Test

 

1.0 OBJECTIVE

1.1 To lay down Procedure for Disinfectant Efficacy Test.

2.0 SCOPE

2.1 This procedure applicable for Disinfectant Efficacy Test of Microbiology Laboratory

3.0 RESPONSIBILITY

3.1 Microbiologist QC

4.0 ACCOUNTABILITY

4.1 QC Manager

5.0 PROCEDURE



5.1 Requirement
5.1.1 Disinfectant
5.1.2 Measuring Cylinder
5.1.3 Sterile Petri Plates
5.1.4 Sterile Saline solution
5.1.5 Sterile & Molten cooled Soybean casein digest agar
5.1.6 Sterile & Molten cooled Sabouraud dextrose agar

5.2 Methodology
5.2.1 From a recently grown stock culture of each of the test organisms subculture on

the surface of respective media slants as given below.
Table 1

Organism

 

    Medium Incubation temperature and duration
Salmonella sp.       SCDA 30-35ºC for 24 to 48 hours
Bacillus subtilis SCDA 30-35ºC for 24 to 48 hours
Aspergillus niger SDA 20-25°C for 48 to 72 hours
Candida albicans SDA 20-25°C for 48 to 72 hours
Pseudomonas aeruginosa SCDA 30–35OC for 24 to 48 hours
Staphylococcus aureus SCDA 30–350C for 24 to 48 hours

5.2.2 Transfer 1 ml of sterile normal saline solution to the freshly grown culture slant, mix properly and transfer

the content of the slant to a tube containing 10 ml sterile normal saline & mix it properly. Similarly prepare the

culture suspension of other cultures. The concentration of culture suspension to be prepared, should be not less

than 106 cfu/ml. To suspend spores of Aspergillus niger 0.05 per cent polysorbate 80 may be added to the saline.
5.2.3 Determine the number of cfu per ml in each suspension by a ten-fold serial dilution.
5.2.4 Transfer 1.0 ml of culture suspension to a tube containing 9.0 ml of sterile saline solution to obtain 10-1 dilution and mix properly.
5.2.5 Transfer 1.0 ml of the 10-1 dilution to a tube containing 9.0 ml of sterile saline solution to obtain test dilution 10-2 and mix properly.
5.2.6 Similarly serially dilute the culture suspension to obtain dilution of 10-3, 10-4, 10-5, 10-6, 10-7 and 10-8.
5.2.7 Plate 1.0 ml from test dilution 10-5, 10-6, 10-7 and 10-8 in duplicate into 90 mm sterile Petri plates in duplicate.
5.2.8 Aseptically pour in each plate about 20 ml sterilized Soyabean Casein Digest agar medium for bacterial culture



and sterilized Sabouraud Dextrose agar for fungal culture, previously liquefied and cooled to around 450C.
5.2.9 Carry out the same dilution method for all the cultures and label accordingly with dilution number and test organism.
5.2.10 Allow to solidify the plates under LAF, invert and incubate individually as specified in above table.
5.2.11 Count the number of colonies and find out the concentration of culture suspension and tabulates the results in specified format.
5.2.12 Apply the above known culture cells (NLT 106 cfu) individually to a surface of 25 cm2.
5.2.13 Allow to air dry the applied cultures at room temperature.
5.2.14 Prepare the disinfectant solution to be tested as per SOP for Preparation of Disinfectant Solution

SOP No. FPPL/MB/018-00 and apply on the surface of artificially contaminated area.
5.2.15 Take a swab immediately after 5 min, 10 min and after 15 min., and then proceed the swab testing.
5.2.16 Media, to be used in swab testing, should be having following neutralizing agents to neutralize the residual disinfectant effect :

Table 2

Organism

 

    Medium Incubation temperature and duration
Salmonella sp.       SCDA 30-35ºC for 24 to 48 hours
Bacillus subtilis SCDA 30-35ºC for 24 to 48 hours
Aspergillus niger SDA 20-25°C for 48 to 72 hours
Candida albicans SDA 20-25°C for 48 to 72 hours
Pseudomonas aeruginosa SCDA 30–35OC for 24 to 48 hours
Staphylococcus aureus SCDA 30–350C for 24 to 48 hours

5.2.7 Incubate the plates as specified in Table 1 and tabulate the result in specified format.
5.2.8 The tested sample is effective at specified concentration if not less than 3 log reduction is achieved in 10 minutes for each culture.

5.3 PRECAUTION
5.3.1 Artificially contaminated area should be cleaned immediately after completion of work.
5.3.2 Use hand gloves and nose mask during testing.
5.4 FREQUENCY: After 6 Month
5.5 ACCEPTANCE CRITERIA
Not less than three log reduction in 10 minutes.

6.0 ABBREVIATIONS

Abbreviation used Extended Form
SOP Standard Operating Procedure
NLT Not less than
   LAF Laminar air flow

sop for calibration and validation of micro autoclave

sop for Sterility failure investigation

cleaning and operation of discard autoclave

sop for operation of fogger machine

sop for Biological assay of lactic acid bacillus

sop for preparation of culture inoculum

STP for sterility testing of sterile gloves

sop for Operation and calibration of active air sampler

sop for transfer of material for testing and sampling in sterile area

entry & exit procedure in microbiology laboratory

Growth Promotion Test In Microbiology Laboratory

Operation of B.O.D in Microbiology Laboratory

Operation of Horizontal Laminar Air Flow in the microbiology laboratory

Operation and cleaning of Pass Box.

Operation and cleaning of air sampler

Cleaning and Sterilization of Glassware

Analysis of water for microbial load in microbiology lab

Operation and temperature monitoring of Refrigerator

Fumigation of Microbiology Laboratory.

Entry & Exit procedure In Sterility Area

SOP for Microbial analysis of Raw Material Finished Products

SOP for Operation & Calibration of pH meter in Micro Department

SOP for Operation & Calibration of pH meter in Micro Department

SOP Operation and calibration of Hot Air Oven In Microbiology

SOP for operation cleaning & calibration of Digital colony counter

SOP for Operation And Cleaning of Microscope

sop for Media Preparation and Consumption

sop for Receipt Storage and Usage of Culture Media

sop for Cleaning Sanitization And Disinfection In Microbiology

sop for Environmental monitoring of all the Classified area

sop for Handling and Sub culturing of Microbial cultures

sop for Media Growth Promotion Test and various Microbiological test

sop for BOD incubator operation and cleaning

sop sampling of water for microbiological analysis

sop for Disinfectant Efficacy Test

sop for for cleaning and operation of vortex mixture

sop for Temperature & Relative Humidity Monitoring

sop for Operation and Calibration of Heating Block

sop for Sterility Testing of Microbiology

sop for Disposal of Culture Media

sop for Drain point of Microbiology

sop for entry & exit procedure In Microbial limit test and Biosafety

sop for Gram Staining of Bacteria in Microbiology Laboratory

sop for Monitoring of Compressed Air/gases for microbiological analysis

sop for BET (Bacterial Endotoxin) test in Microbiology

sop for receipt storage and Determining the population of Biological indicators

sop for qualification of analyst microbiologist

sop for Bioburden test of Packing materials in Microbiology Laboratory

sop for microbiological assay of erythromycin antibiotic

sop for liquid particle counter

sop for operation and calibration of digital zone reader

sop for monitoring of ultraviolet efficiency LAF and pass box

microbiological assay of cyanocobalamin or vitamin B12

gowning procedure for microbiological testing area

swab testing of various surfaces for bioburden determination

sop for endotoxin challenge test

Hold time study protocol for sterilized media

sop for personnel Qualification protocol for aseptic area

sop for sampling and testing of drain water

Sop for Operation of Airborne Particle Counter

sop for Inoculum Preparation

sop for Validation protocol of steam sterilizer autoclave

sop for pathogen detection from drain point

Sop for Analysis of Raw water Purified water water for injection and pure steam water

sop for preservatives efficacy test

sop for collection and preservation of in house isolated microorganisms

sop for Operation Calibration and Maintenance of Micropipette

Sop for UV Efficacy Test

sop for gram staining

Sop for swab testing

sop for microbiological testing of water

PROCEDURE FOR FUMIGATION

sop for depyrogenation of apparatus

sop for media preparation

sop for fertility test growth promotion test of media

sop for Operation and cleaning of moist heat sterilizer

sop for monitoring by active air sampler

sop for swab sampling and testing for clean rooms in production area

sop for monitoring in microbiology laboratory

sop for Fumigation of aseptic area and microbiology lab

sop for monitoring of personnel in aseptic area

sop for maintenance of cultures

sop for Operation and cleaning of laminar bench

preparation of settle plates

sop for monitoring of pure steam

sop for entry and exit procedure to m.l.t and b.e.t room

sop for storage of and use of media

sop for disposal of microbiological media and cleaning of microbiological glassware

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