Abbott, Principles of Bacteriology (7th ed., London, 1905); Crookshank, Bacteriology and Infective Diseases (with bibliography, 4th ed., London, 1896); Duclaux, Traite de microbiologie (Paris, 1899-1900); Eyre, Bacteriological Technique (Philadelphia and London, 1902); Flugge, Die Mikroorganismen (3rd ed., Leipzig, 1896); Fischer, Vorlesungen fiber Bakterien (2nd ed., Jena, 1902); Gunther, Einfiihrung in das Studium der Bakteriologie (6th ed., Leipzig, 1906); Hewlett, Manual of Bacteriology (2nd ed., London, 1902); Hueppe, Principles of Bacteriology (translation, London, 1899); Klein, Micro-organisms and Disease (3rd ed., London, 1896); Kolle and Wassermann, Handbuch der pathogenen Mikroorganismen (Jena, 1904) (supplements are still being published; this is the most important work on the subject); Lofler, Vorlesungen fiber die geschichtliche Entwickelung der Lehre von der Bacterien (Leipzig, 1887); M`Farland, Text-book upon the Pathogenic Bacteria (5th ed., London, 1906); Muir and Ritchie, Manual of Bacteriology (with bibliography, 4th ed., Edin.
In the case of the latter animal the serum infective conditions led Metchnikoff to place great p g importance on phagocytosis.
However, they remain infective in water or moist soil for about one year.
In some of the infective conditions the conflict fortifies the organism against future attacks of the same nature, as for example in the immunity following many of the acute infective diseases.
The parasitic hypothesis postulates the invasion of a parasite from without, thus making a new growth an infective process.