TABLE OF CONTENTS

        Page
 
Introduction 9
 
I. The Pathology of the Respiratory Tract in Influenza 13
 
    (A) Lesions of the Trachea and Bronchi 13
 
        (a) Gross Picture 13
        (b) Histological Picture 14
        (c) Summary 16
 
    (B) Lesions of the Lung 16
 
      (1) Acute Diffuse Fulminating Type 18
 
        (a) Gross Picture 18
        (b) Summary 19
        (c) Histological Picture 20
        (d) Summary 22
 
      (2) Localization and Necrotization of the Pneumonic Process 22
 
        (a) Gross Picture 22
        (b) Histological Picture 24
        (c) Summary 26
 
      (3) Organization of the Bronchiolar and Pneumonic Processes 26
 
        (a) Illustrative Protocols 27
        (b) Summary 30
 
II. Influence of the Respiratory Complications of Influenza upon Tuberculosis of the Lung 32
 
        (a) Illustrative Protocols 32
        (b) Summary 33
 
III. Extrarespiratory Lesions in Influenza 34
 
    (A) Lesions of the Hematopoietic System 34
 
        (a) Lymphadenoid Tissue 34
        (b) Spleen 35
        (c) Bone Marrow 35
 
    (B) Lesions of the Blood Vessels and Elsewhere in the Body 36
 
        (a) Vascular System 36
        (b) Skeletal System 36
        (c) Parenchymatous Organs 36
        (d) Alimentary Canal 37
        (e) Urinary Bladder 37
 
    (C) Miscellaneous Lesions 38
 
        (a) Parenchymatous Organs 38
        (b) Jaundice 39
        (c) Central Nervous System 39
        (d) The Pregnant Uterus 39
        (e) Summary 39
 
IV. A Comparison between the Respiratory Lesions of Influenza and those Initiated by the Inhalation of Poisonous Gases with Special Reference to:— 40
 
    (A) The Inflammatory Response versus the Systemic Capacity to Compensate 40
 
    (B) The Primary Injury 41
 
    (C) The Tendency to Organization of Bronchiolar and Alveolar Exudates with Bronchiolitis and Bronchiolectasis as Sequelæ 42
 
    (D) The Importance of the Trachea and its Ramifications as a Protective Mechanism against Infection of the Pulmonary Parenchyma 42
 
V. Peculiarities of the Histology of Influenzal Pneumonia 44
 
    (A) The Extent of the Initial Pulmonary Lesion 44
 
    (B) The Hemorrhagic Exudate—The Relation of Red to Grey Hepatization 44
 
    (C) The Aplastic Exudate 45
 
    (D) The Hyaline Necrosis of the Pulmonary Tissue 46
 
    (E) The Organization Process 46
 
VI. Infection as a Possible Etiological Factor for Malignant New Growths 48
 
VII. The Bacteriology of Influenzal Pneumonia 49
 
    (A) Organisms Associated with Influenzal Pneumonia 49
 
    (B) The Relation of the Type of Organism to Pleural Involvement 50
 
    (C) The Relation of Different Organisms to the Type of Pneumonia 50
 
    (D) Summary and Discussion 54
 
VIII. Conclusions 55
 
IX. Bibliography 56
 
X. Illustrations 63

FIG. II. AUTOPSY NO. 98. DRAWING OF A SECTION THROUGH A TRACHEA SHOWING NECROTIZING HEMORRHAGIC INFLAMMATORY PROCESS OF THE MUCOSA.