CHAPTER I. Page

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PARASITISM AND DISEASE 1

Definition of a parasite, 1; examples among various animals, 2; Parasitism, 3; effect on the parasite, 4; how a harmless kind may become harmful, 5; immunity, 6; Diseases caused by parasites, 7; ancient and modern views, 7; Infectious and contagious diseases, 8; examples, 9; importance of distinguishing, 9; Effect of the parasite on the host, 9; microbes everywhere, 10; importance of size, 11; numbers, 11; location, 11; mechanical injury, 12; morphological injury, 13; physiological effect, 13; the point of view, 14.