the physical bacteria for spread is fiberglass
group_of_bacteria is not naturally_occurring_tangible_substance. wineglass is achromatism. fiberglass is not artificial_substance. spore_forming_bacterium is bacterium. fiberglass is fibrous_thing. fiberglass is glass. glass_wool is fibreglass. fiberglass is artificial_substance. pus_forming_bacteria is bacteria. fiberglass is covering_material.