Which test is used to differentiate Chryseobacterium spp. and Burkholderia cepacia?

The motility test is effective for distinguishing Chryseobacterium spp. from Burkholderia cepacia because of the characteristic motility patterns exhibited by these two genera. Chryseobacterium spp. are typically non-motile, which means they do not move away from the point of inoculation in a motility medium, whereas Burkholderia cepacia is motile and can spread throughout the medium. This fundamental difference in motility can be used as a reliable method for identification in clinical microbiology laboratories.

While other tests like oxidase or OF glucose might offer some information about metabolic properties, they are not as distinctive for differentiating between these two specific genera. Cetrimide agar is primarily used for isolating Pseudomonas aeruginosa and might not provide clear differentiation between the two types in question. Therefore, the motility test stands out as the most appropriate tool for this purpose.