Pathovars

bacterium responsible for difficult-to-treat infections in humans

thumb|Bacterial black spot of mango caused by Xanthomonas citri pv. mangiferaeindicae|Xanthomonas citri pv. mangiferaeindicae A pathovar is a bacterial strain or set of strains with the same or similar characteristics, that is differentiated at infrasubspecific level from other strains of the same species or subspecies on the basis of distinctive pathogenicity to one or more plant hosts. thumb|Bacterial leaf blight of common panax (Polyscias guilfoylei) caused by Xanthomonas campestris pv. hederae Pathovars are named as a ternary or quaternary addition to the species binomial name, for example