BACTERIA OF THE STOMACH AND INTESTINE, 663 
their growth to the fatty acids, as they are the most resistant to the action of 
acids. Their products in the small intestine are sufficient to keep the con- 
tents of that viscus acid, and they thereby prevent or control putrefaction. 
In the large intestine the secretion is so alkaline that the putrefactive organ- 
isms reassert themselves. 
“*15. Increased putrefaction in the intestinal canal may therefore be due, 
in some cases, either to insufficient mortality among the putrefactive organ- 
isms in the stomach, or to too great mortality among the acid-forming bac- 
teria and yeasts. 
‘‘16. The lactic acid which appears during the first stages of digestion is 
due to the action of organisms. 
‘17, The lactic, acetic, butyric, and succinic acids found in gastroectasis 
are due also to organisms which luxuriate in the too stationary contents. 
The marsh gas, the Brennender-gas of the Germans, is probably due to the 
same cause ; in the only case of this character with edileh I have had the 
good fortune to meet no material for examination could be obtained.” 
The following species have been isolated from feeces and the con- 
tents of the intestine of cadavers : 
Non-pathogenic.-—Streptococcus coli gracilis (Escherich), Micrococcus 
aérogenes (Miller), Micrococcus tetragenus versatilis (Sternberg), Micrococ- 
cus ovalis (Escherich), ‘' Yellow liquefying staphylococcus ” (Escherich), 
‘*Porzellancoccus” (Escherich), Bacillus subtilis, Bacillus aérogenes (Miller), 
Bacterium aérogenes (Miller), Bacillus lactis erythrogenes (Hueppe), Clostri- 
dium foetidum (Liborius), Bacillus muscoides (Liborius), Bacillus putrificus 
coli (Bienstock), Bacillus subtilis similis I. and II. (Bienstock), Bacillus 
Zopfii, Bacillus liquefaciens communis (Sternberg), Bacillus intestinus lique- 
faciens (Sternberg), Bacillus intestinus motilis (Sternberg), Bacillus fluores- 
cens liquefaciens (Fliigge), ‘‘ Colorless fluorescent liquefying bacillus” 
(Escherich), ‘‘ Yellow liquefying bacillus” (Escherich), Bacillus mesenteri- 
cus vulgatus, Bacilli of Booker, A to T, first series; a to s, second series; 
Bacilli of Jeffries A to Z, and a, #. 
Pathogenic.—Staphylococcus pyogenes aureus, Bacillus typhi abdo- 
minalis, Bacillus septiceemiee heemorrhagice, Bacillus of Belfanti and Pas- 
carola, Bacillus enteritidis (Gartner), Bacillus of Lesage, Bacillus pseudo- 
murisepticus (Bienstock), Bacillus coli communis (Escherich), Bacillus lactis 
aérogenes (Escherich), Bacillus cavicida (Brieger), Bacillus of Emmerich, 
Bacillus coprogenes foetidus (Schottelius), Bacillus of Utpadel, Bacillus leporis 
lethalis (Sternberg), Bacillus acidiformans (Sternberg), Bacillus cuniculicida 
Havaniensis (Sternberg), Bacillus cadaveris (Sternberg), Bacillus cavicida 
Havaniensis (Sternberg), Proteus vulgaris (Hauser), Bacillus tuberculosis, 
Spirillum choleree Asiaticee Spirillum of Finkler and Prior. 
