602 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Spirochseta pallida.*— F. Schaudinn and E. Hoffman announce 

 the discovery of two varieties of Spirochceta in venereal lesions. These 

 they name Sp. refringens and pallida. The former is coarser and stains 

 darkly, and is found in surface lesions, while the latter is more slender 

 and difficult to stain, and is found in primary sores, condylomata, and 

 enlarged lymphatic glands. Sp. pallida is actively motile, its movements 

 being undulatory in character. It measures from 4-14 /a in length and is 

 less than \ /<. thick. The number of coils, which are closely set, varies 

 from 6-14. It is extremely resistant to dyes, Giemsa's Eosin-Azurt 

 mixture being the most effective. Spirochsetae are probably Protozoa, 

 and differ from spirilla in the character of their movements, in the 

 flexibility of their bodies, the possession of an undulatory membrane, 

 and a resting stage. One interesting and important point in connection 

 with their life-history is that a Spirochseta stage is a phase in the cycle 

 of a Trypanosome. 



* T. Ziemanni, Deutsche Med. Wochenschr', 1905, No. 18. See also Centralbl. 

 Bakt., I*" Abt.Ref., xxxvi. (1905) pp. 759-61. 

 t J.R.M.S., 1905, p. 115. 



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