108 SANITARY ENTOMOLOGY 



Streptococcus fecalis Andrewes and Horder, an organism occurring 

 normally in the human intestine and occasionally pathogenic has been 

 isolated from city caught Musca doinestica by Scott (1917), Cox, Lewis 

 and Glynn (1912) and Torrey (1912). 



Streptococcus pyogenes Rosenbach, an organism causing ERYSIPE- 

 LAS, SUPPURATION and SEPTICAEMIA was isolated by Scott 

 (1917) from city caught Musca domestica in Washington. 



Streptococcus salivarius Andrewes and Horder, an organism fre- 

 quently found in the mouth, but rarely pathogenic, has been isolated from 

 the intestines of city caught Musca domestica by Torrey (1912), and 

 was also found on flies by Cox, Lewis and Glynn (1912). 



Diplococcus gonorrhoeae Neisser (Gonococcus), the cause of GONOR- 

 RHOEA, was found by Welander (1896) carried on the feet of a fly 

 for three hours after they had been soiled with secretion. 



Diplococcus intracellularis meningitidis Weichselbaum (Meningococ- 

 cus), the cause of CEREBROSPINAL MENINGITIS, is thought to be 

 possibly carried by flies by MacGregor (1917). 



Micrococcus flavus was isolated by Torrey (1912) from the intes- 

 tinal content as well as the surface of city caught flies. 



Micrococcus tetragenus GaffTcy, commonly found in the human body, 

 sometimes pathogenic, sometimes saprophytic, was isolated from Musca 

 domestica by Scott (1917). 



Staphylococcus pyogenes alhus Rosenbach, a cause of SEPTICAE- 

 MIA, was isolated by Cao (1906B) from the mucilaginous envelope cov- 

 ering the eggs of Musca domestica, Sarcophaga vomitoria, Lucilia caesar 

 and Calliphora vomitoria at the time of deposition. Scott (1917) iso- 

 lated it from the bodies of Musca domestica. 



Staphylococcus pyogenes aureus Rosenbach, a frequent cause of 

 ABSCESSES, etc., was shown by Celli (1888) to retain its virulence after 

 passing through the flies' intestines. Herms (1915) proved by experi- 

 ment that Musca domestica can carry great numbers of this organism 

 on its feet. Torrey (1912) and Scott (1917) isolated it from the bodies 

 of city caught flies. Cao (1906B) isolated it from the eggs at the time 

 of deposition of laboratory caught flies of Musca domestica, Calliphora 

 vomitoria, Sarcophaga camaria and Lucilia caesar. 



Staphylococcus pyogenes citreus Passet, a pathogenic, chromogenic, 

 pus-forming organism, was isolated by Scott (1917) from bodies of 

 house flies Musca domestica in Washington. Cao (1906B) fed larvae of 

 Musca domestica, Sarcophaga carnaria, Calliphora vomitoria, and 

 Lucilia caesar on meat polluted with this organism and recovered it from 

 the feces of mature flies bred from these lai-vae. 



Sarcvna aurantiaca Lindner and Koch, a zymogenic, chromogenic 

 (orange yellow) organism found in air and water, rarely pathogenic, 



