Matrix list for Listeria monocytogenes and Listeria spp.
Matrix group |
Category |
Types (matrix) |
Example of items |
Milk & Dairy |
Raw milk and dairy products |
Raw milks and/or fermented/acidified milks (not heat treated) |
Raw milk |
Raw fermented/acidified, raw milk yoghurts, raw dairy-based drinks |
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Raw milk-based products, with high fat content and/or high background microflora |
Raw butters |
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Raw creams |
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Hard and semi-hard cheeses (e.g. Comté, Beaufort) |
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Blue cheeses (Roquefort) |
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Soft cheeses (e.g. Brie, Munster) |
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Heat-processed milk and dairy products |
Pasteurized dairy products |
Milk-based desserts, ice creams, drinks, creams |
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Fermented/acidified pasteurized milk, yoghurts, dairy-based products |
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Pasteurized milks |
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Butters |
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Creams |
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Hard and semi-hard cheeses (heat processed) (e.g. Comté, Emmental, Gouda) |
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Blue cheeses (Bleu de Bresse) |
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Soft cheeses (e.g. Brie, Munster) |
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Dry |
Milk powders |
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Powder for milk-based desserts |
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Meat
|
Raw meat and ready-to-cook meat products (except poultry) |
Fresh meats (unprocessed) |
Carcasses, meat cuts, Carpaccio's |
Minced meat, meat preparations, Carpaccio's |
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Carcasses, swabs, rinsates |
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Ready-to-cook (processed) |
Frozen burger patties, marinated beef shish-kabobs |
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Ready-to-eat, ready-to-reheat meat products |
Cooked meat products |
Cooked ham, pâté |
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Fermented or dried meat products |
Salami |
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Raw cured (smoked) (aw > 0,92) |
Filet de sax, lard |
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Raw cured (smoked) (aw < 0,92) |
Cobourg ham, dry cured ham |
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Raw poultry and ready-to-cook poultry products |
Fresh meats (unprocessed) |
Carcasses, meats, cuts |
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Carcasses, swabs, rinsates |
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Minced meat, meat preparations |
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Ready-to-cook products (processed) |
Seasoned chicken breasts |
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Ready-to-eat, ready-to-reheat meat poultry products |
Cooked meat products |
Cooked turkey filet |
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Fermented or dried meat products |
Chicken sausage |
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Raw cured (smoked) (aw > 0,92) |
Smoked turkey filet |
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Eggs |
Eggs and egg products (derivates) |
Eggs (unprocessed) |
Shell eggs |
Egg products (heat processed) with additives (salt or sugar >2%) |
Egg yolk, egg white, whole liquid egg |
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Egg products (heat processed) without additives |
Egg yolk, egg white, whole liquid egg |
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Dry |
Egg powder |
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Fish & Seafoods |
Raw and ready-to-cook fish and seafoods (unprocessed) |
Fish (unprocessed) |
Fish |
Shellfish (unprocessed) |
Oyster, clam, scallop, mussel |
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Crustaceans (unprocessed) |
Shrimp, crab and crab meat, lobster |
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Ready-to-eat, ready-to-reheat fishery products |
Cooked fishery products |
Shelled and shucked products of cooked crustaceans, fish and seafood terrines |
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Acidified and marinated fishery products |
Roll herring, anchovy |
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Smoked or cured, and other processed products (aw > 0,92) |
Smoked fish |
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Smoked or cured, and other processed products (aw < 0,92) |
Smoked fish, dried (salted) fish |
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Vegetables |
Fresh produce and fruits |
Cut ready-to eat fruits |
Fruit mixes |
Bagged pre-cut leafy vegetables, salads, shredded carrot |
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Produces grown in or in contact with the ground |
Potatoes, yams, sweet potatoes, cassava, dahlia, carrots, cruciferous vegetables |
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Sprouts |
Soy, fenugreek, alfalfa, mung |
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Raw fruit/vegetable juices (unpasteurized) |
Freshly squeezed strawberry juice, smoothies, carrot juice |
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Leafy greens |
Basil, cilantro, green onions, lettuce and parsley |
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Vegetables and fruits (unprocessed) not described above |
Crops |
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Processed fruits and vegetables |
Heat-processed fruit/vegetables juices |
Pasteurized apple juice |
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Canned fruits and vegetables (ambient stable) |
Canned pineapples |
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Heat processed vegetables and fruits |
Blanched spinach, frozen vegetables blanched |
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Fermented/acidified vegetables |
Fermented cabbage, pickle |
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Dried cereals, fruits, nuts, seeds and vegetables |
Nuts and seeds |
Nuts, nut meats, nut butters, seeds |
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Dried fruits and vegetables (aw <0.60) |
Freeze-dried vegetables |
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Dried cerealas |
Corn, oat, breakfast cereals |
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Flours |
Wheat, buckwheat, oat |
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Chocolate, bakery products and confectionary
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Chocolate, bakery products and confectionary
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Pasteries |
Bakery products with custard, confectionaries |
Dry powered |
Cake mixes |
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Multi-component foods |
Multi-component foods or meal Components |
Dry & sugared low moisture (aw <0.85) |
Hot meals |
Ready to (re)heat food: refrigerated |
Cooked chilled foods, boiled rice or pasta, vol-au-vent in vacuum |
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Ready to (re)heat food: frozen |
Frozen fries, pizza, stuffed croissants |
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Ready to (re)heat food: ambient stable (canned) |
Vol-au-vent in glass bottles |
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Mayonnaisebased delisalads (acid) with raw ingredients |
Raw vegetable salads with dressing |
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Mayonnaisebased delisalads (acid) with processed ingredients |
Sandwich spreads |
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Ambient stable acid foods (pH < 4,8) |
Ketchup, sauces, dressings, mayonnaises, mustard |
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Environmental samples |
Environmental samples (food or feed production) |
Equipment or production environment |
Swabs, dusts |
Waters used in manufactureing process |
(Recycled) washing water, process water |