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NOTE:
Depending on the heater unit, allow approximately 30-50 minutes for the 3M Molecular
1
Detection Heat Block Insert to reach temperature. Using a calibrated thermometer, verify that the 3M
2
Molecular Detection Heat Block Insert is at 100 ±1°C.
3
H. P
REPARATION OF THE
3MM
OLECULAR
D
ETECTION
I
NSTRUMENT
4
1.
Launch the 3M™ Molecular Detection Software and log in.
5
2.
Turn on the 3M Molecular Detection Instrument.
6
3.
Create or edit a run with data for each sample. Refer to the 3M Molecular Detection System User
7
Manual for details.
8
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NOTE:
The 3M Molecular Detection Instrument must reach and maintain temperature of 60°C before
10
inserting the 3M Molecular Detection Speed Loader Tray with reaction tubes. This heating step takes
11
approximately 20 minutes and is indicated by an ORANGE light on the instrument’s status bar. When the
12
instrument is ready to start a run, the status bar will turn GREEN.
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I. L
YSIS
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1.
Allow the lysis solution(LS) tubes to warm up to room temperature by setting the rack on the
15
laboratory bench for 2 hours
(a)
.
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2.
Remove the enrichment broth from the incubator and gently agitate the contents.
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3.
One LS tube is required for each sample and the Negative Control (NC) sample.
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3.1
LS tube strips can be cut to desired LS tube number. Select the number of individual LS tubes
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or 8-tube strips needed. Place the LS tubes in an empty rack.
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3.2
To avoid cross-contamination, decap one LS tubes strip at a time and use a new pipette tip for
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each transfer step.
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4.
Transfer enriched sample to LS tubes as described below:
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Transfer each enriched sample into individual LS tube
first
. Transfer the NC
last
.
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4.1
Use the 3M™ Molecular Detection Cap/Decap Tool-Lysis to decap one LS tube strip - one
27
strip at a time. Set the tool with cap attached aside on a clean surface.
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4.2
Transfer 20 µL of sample into a LS tube.
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4.3
Repeat step 4.2 until each individual sample has been added to a corresponding LS tube in the
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strip
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4.4
Use the 3M Molecular Detection Cap/Decap Tool-Lysis to re-cap the LS tube strip. Use the
32
rounded side of the tool to apply pressure in a back and forth motion ensuring that the cap is
33
tightly applied.
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4.5
Repeat steps 4.1 to 4.4 as needed, for the number of samples to be tested
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4.6
When all samples have been transferred, then transfer
20 µL of NC into a LS tube
. Use the
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3M Molecular Detection Cap/Decap Tool-Lysis tool to re-cap the LS tube.
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4.7
Cover the rack of LS tubes with the rack lid and firmly invert 3-5 times to mix.
Suspension has
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to flow freely inside the tube.
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Candidates for 2016 Method of the Year
119