EQUIPMENT MONITORING BY SWAB AND RINSE BIOLOAD METHOD

• PROCEDURE FOR THE EQUIPMENT MONITORING BY SWAB AND RINSE BIOLOAD METHOD:

• Equipment Bio load:
• By Swab Method:

• Sterilize the non-sterile swab stick in 20 mL of normal saline with 0.5% Soya lecithin with 1% Polysorbate 80 in a test tube plugged with non-absorbent cotton/plastic cap and sterilize in an Autoclave as per validated cycle.
• Pre sterilized readymade swabs can also be used.
• Note: Before transferring to sampling location add aseptically 20 mL of normal saline with 0.5% Soya lecithin with 1% Polysorbate 80, incase of ready prepared swab stick are used.
• Carry the sterilized swabs in a stainless steel box, previously wiped with 70% v/v IPA to the respective area.

• Refer respective cleaning validation protocol for swab sampling locations.

• Press the swab with a rolling motion against the side of the glass tube to remove excess saline, Swab an area of approximately 25cm² (5×5 cm) of the equipment, first with horizontal strokes followed by vertical strokes as per Figure-1.

• The swab is mixed in the saline by swirling vigorously. Label the tube with the equipment name/ID, designated location and date. Transfer the swabs samples to the microbiology department.

Note: In case any delay in analysis, store the swab samples at 2-8°C. The time elapsing between collection and examination should not exceed 72 hours. If stored at 2-8°C, allow the samples to attain the ambient temperature before analysis.

• After thorough mixing of the swab samples, filter 10 ml of saline each through 0.45 µm sterile membrane filters and rinse with 100 ml of 0.1 % sterile peptone water and place in SCDA.
• Incubate the SCDA plates at 20-25°C for 72 Hrs. followed by 30-35°C for further 48 Hrs. After completion of incubation count the colonies by using colony counter and record the results in Format-II.
• Number of colonies observed on a membrane X 2.

Example: if two colonies observed on the membrane X 2 = 4 cfu/Swab Here 10 mL used for Total Viable Count another 10 mL used for Pathogen testing.

• Transfer the remaining 10 mL sample to 90 mL of previously sterilized soya bean casein digest broth with 0.5% Soya lecithin with 1% Polysorbate 80 and incubated at 30-35°C for 18-24 hours.
• Perform test for specified organisms listed below as per GTP.
• Frequency: After every ‘type C ’cleaning/Whenever received TRF.

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• Acceptance criteria:

• Rinse Bio load:
• After completion of final cleaning rinse the required equipment with specified quantity of water and collect about 100mL of this sample in a sterilized bottle. Label the bottle with the equipment name/ID, designated location and date. Transfer the bottles to the microbiology department.

Note: In case any delay in analysis, store the samples at 2-8°C. The time elapsing between collection and examination should not exceed 72 hours. If stored at 2-8°C, allow the samples to attain the ambient temperature before analysis.

• Take 10ml of this sample and filter through 0.45mm sterile membrane filters followed by 100 ml of 0.1 % peptone water place in SCDA plate.

• Incubate the SCDA plates at 20-25°C for 72 Hrs. followed by 30-35°C for further 48 Hrs. Count the number of colonies after completion of incubation.
• Count the number of colonies observed on filters / Sample volume and report as cfu/mL in Format-II.
• Take the another 10mL of the sample and transfer to 90mL of previously sterilized soya bean casein digest broth with 0.5% Soya lecithin with 1% Polysorbate 80 and incubated at 30-35°C for 18-24 hours.
• Perform test for specified organisms listed below as per GTP.
• Acceptance criteria:

• Negative control:
• Negative control shall be perform by filtering with Sterile swab containing with 20 mL sterile saline solution, after filtration rinse with 100ml of 0.1% peptone water.
• Acceptance criteria: Negative control should not show any growth.
• Action plan for excursion of Acceptance criteria: If any test result exceeds the specified limits, investigation shall be carried out as per SOP and take necessary corrective action and preventive action (CAPA) shall be taken.

• ANNEXURES: 

• ABBREVIATIONS:

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Annexure-I
EQUIPMENT SWAB/ RINSE REPORT

Annexure-II
EQUIPMENT SWAB/RINSE RAW DATA REPORT