214 
HUMilARY OF CURRENT RESEARCHES RELATING TO 
though not unfrequently several were linked together. B. anindolicunv 
is motile and flagellated, while B. anaerogenes is motionless and devoid 
of flagella. B. coli anindolicum gives in bouillon with potassium nitrite 
and strong sulphuric acid a red colour which can be extracted with 
amyl alcohol. It ferments grape and milk sugars with formation of gas- 
and acid. B. coli anaerogenes also ferments both these sugars, but 
without production of gas. On account of the quantity of acid produced, 
the two organisms were held to belong to the coli group. Only B. coli 
anaerogenes was pathogenic to mice, guinea-pigs, and rabbits. 
Trichorrhexis nodosa.* — Dr. St. Markusfeld finds that the disease- 
of the hair known as Trichorrhexis nodosa is produced by a bacillus 
which cau be demonstrated in all cases by staining and cultivation, and 
which will infect healthy hairs. The bacillus is endosporous, about 2 p, 
long and 0*5 p broad, and has rounded ends. It often forms filaments,, 
and is a facultative anaerobe. It is cultivable on bouillon, agar, and 
gelatin, the latter being liquefied. It coagulates milk. Pure agar cul- 
tures suspended in bouillon and inoculated on healthy hairs reproduced 
the disease. 
* Contralbl. Bakt. u. Par., l te Abt., sxi. (1897) pp. 230-4. 
