User Manual

5
Example of a new test Example of a positive test
Example of a negative test
Read the Test Strip
Leavetheteststripsittingonaatsurfaceduringincubation.Foroptimumresultsthetestresultsshouldbe
performed at room temperature. After waiting 25 minutes, examine the test strip in good lighting. If the
testisnotreadwithin60minutesofaddingthewatersample,itshouldbediscardedandanewtestshouldbe
run. The test should show one of the following results on the large result window on the test strip:
Negative Result:One(1)REDlineacrosstheresultwindowattheendfurthestfromthesamplewindow.
Positive Result:Two(2)REDlinesacrosstheresultwindow.Theredlineclosesttothesamplewindowmay
be very faint (pale pink). Any distinct line, no matter how faint, should be counted as positive.
Invalid Result: If the test does not show any red lines; or if it only shows a line at the end closest to the sample
window;orifthelinefurthestfromthesamplewindowisveryfaint,thenthetestisinvalid.Repeatthetestand
notify your supplier for technical support.
Interpreting the Results
Positive Results:
A positive test result indicates that Legionella pneumophila serogroup 1 bacteria were present in the sample
above the detection limit.
The test does not differentiate between viable (living) and non-viable (dead) organisms. The test will detect
viablebutnon-cultruablebacteriawhicharenotdetectablebytraditionallaboratorytechniques.Apositive
result does not necessarily mean that viable bacteria are present.
When a positive result is observed, seek advice from your risk management plan, or water treatment specialist.
Negative Results:
A negative test result indicates that Legionella pneumophila serogroup 1 bacteria were not detected or the
number of bacteria in the sample were below the detection limit.
A negative result does not necessarily mean that Legionella bacteria are absent.
A negative result does not mean that the system is completely free from risks associated with Legionella
bacteria. The test only detects Legionella pneumophila serogroup 1. The test does not detect the presence of
other Legionella species or serogroups.