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 Cascade Effect. âAn ecological cascade effect is a series of secondary extinctions that is triggered by the primary extinction of a key species in an ecosystemâ. (http://en.wikipedia.org/wiki/Cascade_effect_(ecology)). Recently, the removal of apex predators from food chains in certain areas of the world has had a devastating effect on the ecosystem from which it derives, one of the most common predators removed being the shark.