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1.00439

ChromoCult® Listeria Agar Enrichment-Supplement

ChromoCult®, selective for Listeria spp.

Synonym(s):

Listeria Enrichment Supplement

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About This Item

NACRES:
NA.74
UNSPSC Code:
41106212
Technical Service
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Quality Segment

100

agency

APHA, ISO 11133, ISO 11290-1, ISO 11290-2

form

lyophilized powder

manufacturer/tradename

ChromoCult®

technique(s)

microbiological culture: suitable

pH

6.6 (20 °C in H2O)

application(s)

food and beverages
microbiology
pathogen testing

compatibility

for use with ChromoCult® Listeria agar (base) acc. OTTAVIANI and AGOSTI (1.00427)

storage temp.

2-8°C

suitability

selective for Listeria spp. (Agar)

General description

ChromoCult® Listeria Agar Enrichment-Supplement is a homogeneous, sterile suspension of L-α-phosphatidylinositol in distilled water. Differentiation of Listeria monocytogenes from non-pathogenic Listeria sp. is achieved through the production of a phosphatidylinositol-specific phospholipase C (PI-PLC). Listeria monocytogenes hydrolyses the specific purified substrate added to the medium producing an opaque halo around the colonies.

Application

ChromoCult® Listeria Agar Enrichment-Supplement is used as an additive for the preparation of ChromoCult® Listeria Selective Agar (1.00427) for detection and enumeration of Listeria monocytogenes and of Listeria sp. in a variety of food products.

Analysis Note

Growth promotion test according to ISO 11133.
Inoculum on reference medium
- Listeria monocytogenes ATCC 13932 (WDCM 00021):
10 - 100
- Listeria monocytogenes ATCC 19111 (WDCM 00020): 10 - 100
- Listeria innocua ATCC 33090 (WDCM 00017): 10 - 100
Recovery on test medium
- Listeria monocytogenes ATCC 13932 (WDCM 00021):
≥ 70 %
- Listeria monocytogenes ATCC 19111 (WDCM 00020): ≥ 70 %
- Listeria innocua ATCC 33090 (WDCM 00017): ≥ 70 %
Colonies
- Listeria monocytogenes ATCC 13932 (WDCM 00021):
blue-green; non-transparent zone
- Listeria monocytogenes ATCC 19111 (WDCM 00020): blue-green; non-transparent zone
- Listeria innocua ATCC 33090 (WDCM 00017): blue-green
Growth
- Escherichia coli ATCC 25922 (WDCM 00013):
no growth
- Escherichia coli ATCC 8739 (WDCM 00012): no growth
- Enterococcus faecalis ATCC 19433 (WDCM 00009): no growth
- Enterococcus faecalis ATCC 29212 (WDCM 00087): no growth
Incubation: Listeria 24-48 Std. 37°C aerobic; other strains at least 48 hrs.

Other Notes

Replaces: 1004390017

Legal Information

CHROMOCULT is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class

12 - Non Combustible Liquids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

NACL1004390010: + 1004390010: + 1004398001: + 1004390017:

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Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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