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
A cascade reaction, also known as a domino reaction or tandem reaction, is a chemical process that comprises at least two consecutive reactions such that each subsequent reaction occurs only in virtue of the chemical functionality formed in the previous step.