Salmonella Detection in Eggs Using

Recombinant bacteriophages specific for Salmonella spp. and containing bacterial luciferase genes were constructed. The phage caused the host cells to luminesce when mixed with Salmonella spp. and the luminescence could be detected using a photon-counting charge-coupled device (CCD) camera, a luminometer, or X-ray film. The initial assay system was capable of detecting Salmonella isolates from group B and group D. Certain isolates from group C could also be detected. With 6 h of preincubation, as few as 10 CFU of Salmonella cells per ml in the original sample could be detected. The minimum time required for the detection of 10