What causes false positive (FP) or false negative (FN) results?

What causes false positive (FP) or false negative (FN) results?
Cause FP FN
Inappropriate storage conditions (see question XX)
Shorter incubation time
Incubate at a lower temperature than 37 °C
Incubate at a higher temperature than 37 °C
Immediate or delayed measurement of the sample after tablet release contrary to the directions in the N-Light™ Salmonella Risk Instructions for Use (IFU)
The antibiotic tablet was not released into the broth
Swabs were not left inside the tube.

Any deviation from the N-Light™ Salmonella Risk test IFU can lead to FP or FN results.

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