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Food and Nutrition

Example of a Completed Data Summary with Criteria for a Qualitative Study

Example 1 - Data Submitted for Multiple Foods

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.


Example 2 - Application for One Food Commodity

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.