What does the dark blue-green dot in the upper-left corner of the 4Dx SNAP® test window indicate?

The dark blue-green dot in the upper-left corner of the 4Dx SNAP® test window serves as a control indicator that confirms the test was run correctly. This control dot ensures that the reagents are working appropriately and that the test is valid. When this dot appears, it indicates that the testing process was executed without any issues, allowing the results to be considered trustworthy.

Recognition of this control is critical in interpreting the results accurately, as it helps the veterinarian determine whether subsequent results — which assess the presence of certain antigens indicative of specific diseases in dogs — can be relied upon. If the control dot were absent, it would suggest issues such as an incorrect test procedure, which would necessitate repeating the test for accurate results.