In the manual version of UNIQUE , a plastic module containing specially prepared reagents is used in conjunctionwith a plastic stick coated with antibodies specific for the bacteria to be detected. This stick is used to captureany bacteria, e.g. Salmonella, that are present in the sample to be tested. Using a procedure patented by TECRA, any captured bacteria can then be grown on the surface of the stick, and detected using an immunoassayprocedure that shows the presence of the bacteria as a purple colour.