Hi Hilltrekker.
I was under the impression that glanders is a zoonotic infection of cattle, horses etc caused by Burkholderia spp while Rose Bengal Plate Test or RBPT is performed for Brucellosis in cattle.
Could you provide more details in your post?
I found this 1917 article in Nature on tests for glanders in horses. We have to appreciate the amount of work that went into tedious tests.