Infection : the search for its causes -- Worms. Ascaris-the giant intestinal roundworm ; Tapeworms ; Hookworm anaemia ; Schistosomiasis (sometimes called Bilharziasis) ; Filariasis (elephantiasis) -- Arthropods. Lice (pediculosis) ; The itch (scabies) -- Fungi. Tinea (ringworm, etc.) ; Candidiasis (thrush) -- Protozoa. Giardiasis ; Amoebic dysentery and liver abscess ; Malaria ; Sleeping sickness (African trypanosomiasis) ; Cutaneous leishmaniasis (Oriental sore) and visceral leishmaniasis (kala azar) ; Chagas disease (South American trypanosomiasis) -- Bacteria. The germ theory of disease ; Anthrax ; Tuberculosis (consumption) ; Leprosy (Hansen's disease) ; The golden staphylococcus ; The pus-forming streptococcus ; Childbed fever ; Infections of the skin and underlying tissues ; Tonsillitis and scarlet fever ; Post-streptococcal diseases ; Rheumatic fever ; Post-streptococcal acute glomerulonephritis ; The pneumococcus and pneumonia ; Upper respiratory infections : sinusitis, middle ear infections, and mastoiditis ; Gonorrhoea (the clap) ; Syphilis (the pox) ; The meningococcus and meningitis ; Diphtheria ; Whooping cough (pertussis) ; Cholera ; Typhoid fever ; Escherichia coli ; Bacillary dysentery (shigellosis) ; Tetanus (lockjaw) ; Plague (the Black Death) ; Brucellosis (undulant fever) ; Legionnaires' disease ; Helicobacter pylori and peptic ulcers ; Typhus ; Chlamydia, trachoma, and urethritis -- Viruses. The discovery of viruses and determination of their nature ; Smallpox (variola) ; Rabies (hydrophobia) ; Yellow fever ; Dengue fever (breakbone fever) ; Poliomyelitis (infantile paralysis) ; Measles (rubeola) ; German measles (rubella) ; Mumps ; Varicella (chickenpox and shingles) ; Herpes simplex (cold sores and more) ; Glandular fever (infectious mononucleosis) ; Influenza (the flu) ; Viral hepatitis (A, B, and C) ; Human Immunodeficiency Virus and the Acquired Immune Deficiency Syndrome -- Prions. Kuru, mad cows, and variant Creutzfeldt-Jacob Disease -- Unde venis et quo vadis?