This method is applicable to the enumeration of Salmonella species in the following foods: raw meat (pork and poultry), processed meat (smoked ham), dairy (raw milk), egg products (whole shell egg and dried egg products), and fruit and vegetables (cantaloupe, bean sprouts, and spinach).
Note: While this method is only approved for certain food products and animal feeds, as listed above, it is assumed that this method can be used with other commodities. It is imperative that the Laboratory Supervisor ensures that proper validation is completed for other commodities to fulfill SCC accreditation requirements. It is requested that these validation data be forwarded to Don Warburton so the "Application Section" can be expanded to include these new categories.
| Food Category | Sample Information | Actual Data (new method compared to standard method) |
Calculated Criteria | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Food Type | Contaminating Microorganism1 | NC or AC? CFU or MPN/g (needed for artificially contaminated) |
Total Tested | Positive | Negative | False Positive | False Negative | Sensitivity (≥98%) |
Specificity (≥90.4%) |
FP Rate (<9.6%) |
FN Rate (<2%) |
Test Efficacy (≥94%) |
|
| Application for multiple foods | (Application approved for raw meat (pork and veal), processed meat (smoked ham), dairy (raw milk cheese), egg products ( whole shell egg, and dried egg products), and fruit and vegetables (cantaloupe, bean sprouts, and spinach) as the other food types need more work; yellow below shows areas not meeting HC criteria) | ||||||||||||
| Raw meat | Pork | Salmonella | NC | 113 | 82 | 30 | 1 | 0 | 100 | 96.8 | 3.2 | 0 | 99.1 |
| Beef | Salmonella | NC | 50 | 19 | 31 | 0 | 0 | 100 | 100 | 0 | 0 | 100 | |
| Veal | Salmonella | NC | 103 | 62 | 40 | 0 | 1 | 98.4 | 100 | 0 | 1.6 | 99 | |
| Processed meat | Smoked ham | Salmonella | NC | 30 | 20 | 10 | 0 | 0 | 100 | 100 | 0 | 0 | 100 |
| Pepperettes | Salmonella | NC | 94 | 79 | 9 | 0 | 0 | 100 | 100 | 0 | 0 | 100 | |
| Lunch meats | Salmonella | NC | 105 | 69 | 34 | 0 | 2 | 97.2 | 100 | 0 | 2.8 | 98.1 | |
| Dairy | Raw milk cheese | Salmonella | NC | 140 | 83 | 48 | 6 | 3 | 96.5 | 88.9 | 11.1 | 3.5 | 93.6 |
| Ice cream | Salmonella | NC | 141 | 10 | 129 | 1 | 1 | 90.9 | 99.2 | 0.8 | 9.1 | 98.6 | |
| Raw milk | Salmonella | NC | 114 | 75 | 38 | 1 | 0 | 100 | 97.4 | 2.6 | 0 | 99.1 | |
| Animal feed | Dog food | Salmonella | NC | 76 | 69 | 5 | 0 | 2 | 97.2 | 100 | 0 | 28.6 | 97.4 |
| Hog feed | Salmonella | NC | 86 | 69 | 5 | 2 | 10 | 87.3 | 71.4 | 28.6 | 12.7 | 86 | |
| Chicken feed | Salmonella | NC | 118 | 83 | 33 | 0 | 2 | 97.6 | 100 | 0 | 2.4 | 98.3 | |
| Egg products | Raw liquid egg | Salmonella | NC | 101 | 69 | 30 | 0 | 2 | 97.2 | 100 | 0 | 2.8 | 98 |
| Whole shell egg | Salmonella | NC | 56 | 21 | 35 | 0 | 0 | 100 | 100 | 0 | 0 | 100 | |
| Dried Egg products | Salmonella | NC | 79 | 66 | 12 | 1 | 0 | 100 | 92.3 | 7.7 | 0 | 98.7 | |
| Fruits and vegetables | Cantaloupe | Salmonella | NC | 151 | 22 | 129 | 0 | 0 | 100 | 100 | 0 | 0 | 100 |
| Bean sprouts | Salmonella | NC | 102 | 62 | 39 | 0 | 1 | 98.4 | 100 | 0 | 1.6 | 99 | |
| Spinach | Salmonella | NC | 162 | 60 | 100 | 1 | 1 | 98.4 | 99 | 1 | 1.6 | 98.8 | |
1 Contaminating microorganism: if artifically contaminated then the ID of the inoculating organism must be supplied. If naturally contaminated, supply serotype if available.
DISCLAIMER: This table is a fictitious example of a part of a data submission and is NOT meant to be representative of true data.
This method is applicable to the enumeration of Salmonella species in the following dairy products: yogurt and raw milk cheese.
Note: While this method is only approved for certain dairy products, as listed above, it is assumed that this method can be used with other dairy products as well as other commodities. It is imperative that the Laboratory Supervisor ensures that proper validation is completed for other commodities to fulfill SCC accreditation requirements. It is requested that these validation data be forwarded to Don Warburton so the "Application Section" can be expanded to include these new categories.
| Food Category | Sample Information | Actual Data (new method compared to standard method) |
Calculated Criteria | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Food Type | Contaminating Microorganism1 | NC or AC? CFU or MPN/g (needed for artifically contaminated) |
Total Tested | Positive | Negative | False Positive | False Negative | Sensitivity (≥98%) |
Specificity (≥90.4%) |
FP Rate (<9.6%) |
FN Rate (<2%) |
Test Efficacy (≥94%) |
|
| Application for one food commodity | (Application approved for Ayogurt and raw milk cheese as the other food types need more work; yellow below shows areas not meeting HC criteria) | ||||||||||||
| Dairy | Ice cream | Salmonella Berta | AC 1 CFU/25 |
89 | 59 | 30 | 0 | 0 | 100 | 100 | 0 | 0 | 100 |
| Raw milk | Salmonella | NC | 76 | 69 | 5 | 0 | 2 | 97.2 | 100 | 0 | 2.8 | 97.4 | |
| Processed cheese | Salmonella Infantis | AC 1.2 CFU/25 |
82 | 75 | 6 | 1 | 0 | 100 | 85.7 | 14.3 | 0 | 98.8 | |
| Dry skim milk powder | Salmonella Senftenberg | AC 0.4 CFU/25 |
118 | 83 | 33 | 0 | 2 | 97.6 | 100 | 0 | 2.4 | 98.3 | |
| Yogurt | Salmonella Agona | AC 3 CFU/25 |
79 | 66 | 42 | 1 | 0 | 100 | 97.7 | 2.3 | 0 | 99.1 | |
| Ice milk | Salmonella Heidelberg | AC 1 CFU/25 |
118 | 83 | 33 | 0 | 2 | 97.6 | 100 | 0 | 2.3 | 98.3 | |
| Cream cheese | Salmonella | NC | 133 | 98 | 33 | 0 | 2 | 98 | 100 | 0 | 2 | 98.5 | |
| Raw milk cheese | Salmonella | NC | 162 | 60 | 100 | 1 | 1 | 98.4 | 99 | 1 | 1 | 98.8 | |
1 Contaminating microorganism: if artifically contaminated then the ID of the inoculating organism must be supplied. If naturally contaminated, supply serotype if available.
DISCLAIMER: This table is a fictitious example of a part of a data submission and is NOT meant to be representative of true data.