DuPont Qualicon BAX
®
System
PCR ASSAY FOR GENUS
LISTERIA
24E
PRODUCT DESCRIPTION
Listeria species are indicator organisms whose detection can indicate that pathogenic Listeria monocytogenes is
present. Listeria monocytogenes can cause serious illness in persons with heightened susceptibility, especially
pregnant women and immunocompromised persons. Traditional culture methods can take four days or more to get
results, and many rapid methods require a two-stage, 48-hour enrichment. With this BAX
®
system assay, however,
accurate and reliable results are available the next day with a single-step, 24-hour enrichment.
BAX
®
System PCR Assay
Genus Listeria 24E
Part # QB8135C
96 tests per kit
PCR tubes with tablets, optical caps,
lysing agents, protease, lysis buffer
Store at 2-8°C
Stable to expiration date on label
Benefits
•
Speed – Single-stage enrichment complete in only 24
hours
•
Accuracy – Automated DNA-based analysis
•
Exceptional sensitivity – Detects 10
4
cfu/mL
•
Ease of use – Tableted reagents reduce operator error
•
Closed-cap system avoids amplicon contamination in the lab
•
LIMS-compatible electronic data for easy storage, sharing and retrieval
•
Designed for efficient workflow and reliable results
Features
•
PCR processing completes in 3.5 hours
•
Can be run in mixed batches with other BAX® system standard assays
•
Validated on meat, seafood, dairy, vegetable and environmental samples
•
Detects all species of Listeria except some strains of
L. grayi
•
100%
exclusivity
•
Next-day results with 24 LEB media (CM1107/SR0243E)
Approvals
•
AFNOR validated to ISO 16140; Certificate number QUA 18/06 – 07/08
.
.
Copyright © 2007 DuPont. All rights reserved. The DuPont oval logo, DuPont™, The Miracles of Science™ and BAX® are trademarks or registered trademarks of DuPont or its affiliates. BAX® System Q7
instruments are sold under licensing arrangement with Applied Biosystems for food testing. Use for research and development, quality assurance and quality control testing under supervision of technically
qualified persons. Not approved for clinical use. Please read the limitation of warranty and liability before use. 27A-031.1-0608
BAX® System PCR Assay for Genus
Listeria 24E
Page 2
Sample preparation
Enrichment: Homogenise samples (1:10) in prepared 24 LEB
(CM1107/SR0243E) using filterless stomacher bags.
Incubate 24 hours at 37°C.
BAX® system protocol
10:00
Create rack file and
warm up cycler.
10:05
Dilute Lysing agent 1
with 1.8 mL sterile water, and
combine in 4:1 ratios with
Lysing agent 2.
10:10
Transfer 50 µL of
combined agents to cluster
tubes, then add 0.5 mL
enriched sample and incubate
for 30 minutes at 37°C.
10:50
Mix protease with
lysis buffer and transfer
200 µL of lysis reagent to
new cluster tubes.
10:55
Transfer 5 µL of
lysate to cluster tubes.
11:00
Heat cluster tubes for
30 minutes at 55°C, then 10
minutes at 95°C. Cool for 5
minutes in lysis cooling block.
11:45
Hydrate PCR tablets in
second cooling block with
50 µL of chilled lysate.
11:50
Place sealed PCR
tubes in cycler and run
program.
3:20
Review results.
Oxoid
Wade Road
Basingstoke
Hampshire, RG24 8PW, UK
Tel: +44 (0) 1256 841144
Fax: +44 (0) 1256 814626
Email:
oxoid.info@thermofisher.com
Folio No. 1249 08/08