194 INFLAMMATORY AND SUFPURAT1VE CONDITIONS. 



they are frequently present, though in most cases associated 

 with other pyogenic organisms. Some cases of enteritis in 

 infants streptococcic enteritis are also apparently due to 

 a streptococcus, which, however, presents in cultures certain 

 points of difference from the streptococcus pyogenes. 



The bacillus coli communis is found in a great many inflam- 

 matory and suppurative conditions in connection with the 

 alimentary tract for example, in suppuration in the perito- 

 neum, or in the extraperitoneal tissue with or without perforation 

 of the bowel, in the peritonitis following strangulation of the 

 bowel, in appendicitis and the lesions following it, in suppura- 

 tion around the bile-ducts, etc. It may also occur in lesions in 

 other parts of the body, endocarditis, pleurisy, etc., which in 

 some cases are associated with lesions of the intestine, though 

 in others such cannot be found. It is also frequently present in 

 inflammation of the urinary passages, cystitis, pyelitis, abscesses 

 in the kidneys, etc., these lesions being in fact most frequently 

 caused by this or closely allied organisms. 



In certain cases of enteritis it is probably the causal agent, 

 though this is difficult of proof, as it is much increased in 

 numbers in practically all abnormal conditions of the intestine. 

 We may remark that it has been repeatedly proved that the 

 bacillus coli cultivated from various lesions is more virulent than 

 that in the intestine, its virulence having been heightened by 

 growth in the tissues. 



The micrococcus tetragenus is often found in suppurations 

 in the region of the mouth or in the neck, and also occurs in 

 various lesions of the respiratory tract, in phthisical cavities, 

 abscesses in the lungs, etc. Sometimes it is present alone, and 

 probably has a pyogenic action in the human subject under 

 certain conditions. In other cases it is associated with other 

 organisms. Recently one or two cases of pyaemia have been 

 described in which this organism was found in a state of purity 

 in the pus in various situations. In this latter condition the pus 

 has been described as possessing an oily, viscous character, and 

 as being often blood-stained. 



The bacillus pyocyaneus is rarely found alone in pus, though 

 it is not infrequent along with other organisms. We have met 

 with it twice in cases of multiple abscesses, in association with 

 the staphylococcus pyogenes aureus. Lately some diseases in 



