Bacterial parasites that cause disease are called pathogens. Among bacterial plant diseases are leaf spot, fire blight, and wilts; animal diseases caused by bacteria include tuberculosis, cholera, syphilis, typhoid fever, and tetanus.
Definition of cascade 1: a steep usually small fall of water; especially: one of a series 2 a: something arranged or occurring in a series or in a succession of stages so that each stage derives from or acts upon the product of the preceding
1. A waterfall or a series of small waterfalls over steep rocks. 2. Something, such as lace, thought to resemble a waterfall or series of small waterfalls, especially an arrangement or fall of material. 3. A heavy, uncontrolled outpouring: a cascade of abusive comments. 4. a. A succession of stages, processes, operations, or units.