INDEX OF INFECTIOUS DISEASES AND 
BACTERIA FOUND IN THEM. 
Abscesses. The bacteria most commonly found in acute abscesses 
are: Staphylococcus pyogenes aureus, 468, and albus, 470, and strep- 
tococcus pyogenes, 481-483. The following species are also occa- 
sionally met with: Pneumococcus, 509; colon bacillus, 449-453; 
typhoid bacillus, 410; micrococcus tetragenus, 472, and influenza 
bacillus, 324. In ‘“‘cold ahscesses” the tubercle bacillus is usually 
the only micro-organism present. Beside these bacteria other varie- 
ties may sometimes cause circumscribed suppurative processes. 
Acne. Unna and Hodara (1894) obtained a bacillus from the 
contents of acne pustules which they believe to be the cause of true 
acne in man. Staphylococci are usually present in the pustules, and 
undoubtedly exert some influence in the production of the affection. 
Actinomycosis. Due to the presence of the actinomyces or ray 
fungus, 618. 
Alopecia. Although many dermatologists consider alopecia 
areata to be of neurotic origin, others incline to the belief that 
this affection is due to micro-organisms. Definite proof, however, 
is still wanting of the infectiousness of the disease, or of the causal 
relation of any specific micro-organism to it. Holborn (1895) de- 
scribed a micro-organism which he named trichophyton radeus, 
obtained it in pure culture and produced a similar affection in rab- 
bits by inoculation, claiming that it was the cause of the disease in 
man. 
Angina. When not diphtheritic the pyogenic cocci, 483, includ- 
ing the pneumococcus, are most frequently found in angina, also 
Vincent's bacillus, 354. 
Anthrax. Due to the bacillus anthracis, 554. 
Appendicitis. In thirty-two out of thirty-five cases of appen- 
dicitis bacteriologically examined by Hodenpyl (1893) the bacillus 
43 
