CONTENTS 



Introduction 33 



Etiology (cause) of diseases 34 



Predisposing causes 34 



Age 34 



Sex . . . . 34 



Heredity 34 



Race 35 



Climate . 35 



Preexisting disease 35 



Exciting causes 35 



Food 35 



Micro-organisms 35 



Bacteria '. „ 36 



Protozoa 37 



Fungi 37 



Treatment of disease 38 



Preventive treatment 38 



Curative treatment 39 



American foul brood 39 



European foul brood . . . * 41 



So-called ' ' pickled brood " 41 



Paralysis 41 



Summary and conclusions 4'2 



ii 



