The presence of Salmonella in the sample is detected by the combination of 3 different test principles, alkalization of the medium (medium color change to yellow), greening colonies (black also), and motility of Salmonella.
Salmonella Positive
1. Black to green isolated or fused colonies
2. Medium around the colonies changes to yellow
3. Tailing due to motility
Salmonella Negative
1. No change in plate color
2. Red or reddish-purple colonies
Compact Dry SL is a simple dry culture medium that detects existence of Salmonella qualitatively based on its specific character, such as biochemical reactivity and motility.
