SUPPURATION. 165 



attacked seem to be the bile-ducts and the vermiform 

 appendix, though the significance of the organism in 

 appendicitis has no doubt been overrated. It has also 

 been found in the kidney in scarlatinal nephritis, and 

 is thought to be the exciting cause of some cases. For 

 a more particular study of this organism the reader is 

 referred to the chapter on Typhoid Fever. 



The typhoid bacillus is probably less frequently a cause 

 of suppuration than either of the others, yet it seems to 

 be the occasional cause of the purulent sequelae of typhoid 

 fever. A case has recently been reported by Flexner in 

 which metastatic abscesses were found to be caused by it. 



The Micrococcus tetragenus has also been found in the 

 pus of acute abscesses : it is quite common in the cavities 

 of pulmonary tuberculosis, and may aid in the destructive 

 processes involved in the general phthisical infection. 



Gonorrhea. All authorities now accept the "gono- 

 coccus" to be the cause of gonorrhea. It was first ob- 

 served in the urethral and conjunctival secretions of gon- 





* ? 



** 



FIG. 53. Gonococcus in urethral pus; x 1000 (Frankel and Pfeiffer). 



orrhea and purulent ophthalmia by Neisser in 1879. The 

 organisms are of hemispherical shape, arranged in pairs, 

 so that the inner surfaces are separated from each other 



