Contents 



Preface v 



Part I. The Actinomycetes 



By Selman A. Waksman 



Classification of the Actinomycetes 



Introduction 1 



The Genus Streptomyces 2 



Need for Standard Media and Standard Conditions of Growth .... 4 



Classification System of Krassilnikov 6 



Classification System of Waksman and Henrici 9 



Classification of Certain Important Group-Species of Streptomyces 



from the Point of View of Antibiotic Production 20 



The Genus Nocardia 29 



Classification System of Krassilnikov 29 



Classification System of Waksman and Henrici 32 



The Genus Micromonospora 35 



Classification System of Krassilnikov 35 



Classification System of Jensen (emend.) 36 



The Genus Thermoactinomyces 36 



The Genus Actinomyces 37 



Description of Species of Streptomyces 38 



Description of Species of Micromonospora 127 



Description of Species of Thermoactinomyces 130 



Description of Species of Nocardia 132 



Description of Species of Actinomyces 161 



Part II. The Antibiotics 



By Selman A. Waksman and Hubert A. Lechevalier 



Production of Antibiotics by Actinomycetes 165 



Antibiotic Groups 168 



Key I to the Identification of the Antibiotics of Actinomycetes. . . . 170 



Key II to the Identification of the Antibiotics of Actinomycetes. . . 178 



Description of the Antibiotics of Actinomycetes 185 



Selected General References 237 



Index to Species of Actinomycetes 241 



Index to Antibiotics of Actinomycetes 245 



vii 





