Specificity of the genomic DNA probes. Vertical lanes contained genomic DNA amounts equivalent to different numbers of cells of each tested species (105, 5 × 105, 106, 5 × 106, as indicated). The samples labeled "Mix" are standards that contain DNA amounts equivalent to 105, 5 × 105, 106, 5 × 106, cells of each tested species. (A) The horizontal rows contain either Asaia sp. or Serratia sp. genomic DNA probes previously diluted in hybridization buffer, as indicated, and (B) the horizontal rows contain either Chryseobacterium sp. or Klebsiella sp. genomic DNA probes previously diluted in hybridization buffer, as indicated. A signal at the intersection of the horizontal and vertical lanes indicates the presence of a species.