text: what is the meaning of eubacteria?   eubacteria, also known as the true bacteria, have a bad reputation. they are seen as disease causing agents. every day new products come out adverstising their ability to destroy these microscopic but dangerous creatures. in reality, only a small percentage of these unicellular organisms cause disease. the rest fullfill many important roles in the natural world. eubacteria can be photoautotrophs, saprophytes, or symbionts.