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
The first is the cascade process, in which the natural gas is cooled by another gas which in turn has been cooled by still another gas, hence named the cascade process. There are usually two cascade cycles prior to the liquid natural gas cycle.