148 MANUAL OF BACTERIOLOGY. 



sharply between them. Fomites are the materials on which 

 the infectious material is conveyed. 



A miasmatic disease is a variety of infection in which the 

 microorganisms are not received from another case of the dis- 

 ease, but are supposed to have been derived from the external 

 world, particularly through foul air. This word is less used 

 than formerly. 



The following is a list of the most important diseases of 



man caused by bacteria. The proof as required by the rules 



of Koch is not complete for all of them : 



Tuberculosis, Suppuration and Influenza, 



Leprosy, certain inflamma- Diphtheria, 



Glanders, tory conditions al- Typhoid fever, 



Anthrax, lied to it, Dysentery (not ame- 



Tetanus, Epidemic cerebro- bic dysentery), 



Malignant edema, spinal meningitis, Asiatic cholera, 



Bubonic plague, Gonorrhea, Relapsing fever, 



Malta fever, Chancroid or soft Rhinoscleroma (?), 



Erysipelas, chancre, Actinomycosis. 

 Lobar pneumonia, 



Malaria and amebic dysentery are caused by microscopic 

 unicellular animal organisms (protozoa). It has been claimed 

 that small-pox is caused by protozoa; this view has acquired 

 added interest from the recent researches of Councilman. 

 Recent work indicates that the "sleeping sickness" (of Africa) 

 and some other diseases of tropical climates are caused by 

 protozoa (see appendix). 



Thrush and certain parasitic skin diseases are caused by 

 fungi of more highly organized structure than bacteria. 



In each of the following diseases there is good reason to think 

 that the cause is some kind of microorganism, but it has not yet 

 been discovered: 



Syphilis, chicken-pox, measles, scarlet fever, German measles, 

 mumps, whooping-cough, yellow fever, typhus fever, rabies, 

 dengue. 



Rheumatic fever and beri-beri would be placed in this list 

 by many writei's. 



