SYPHILIS OF THE EYE 



359 



generation, it is possible that they, like the Trypanosoma, will not 

 show their usual form in many of their stages. 



Spirochatfe are scanty in the Giemsa preparations : a considerable 

 number of them must therefore be stained and examined. In 

 superficial processes, according 

 to Schaudinn, another Spiiv- 

 ch<eta is occasionally found, the 

 Spirochceta perfringens. This 

 stains much more clearly with 

 the ordinary aniline stains, and 

 with the Giemsa method is blue 

 and has no flagellae. 



According to Schaudinn, the Spiro- 

 chceta pallida is between 10 and 15 /*. 

 in length (by the silver method still 

 longer spirals can be found), and of 

 an even breadth of only j M. The ends 

 are pointed, and have each a ciliuin. 

 The coils are sharp, regular, short, and 

 about 1 fj. long. 1 (For methods, see 

 ' Technique.') 



FIG. 77. ' SPIROCHJET.E ' IN THE CORNEA 

 OF A RABBIT : TANGENTIAL SECTION. 



Microphoto by Hoffmann and Bertarelli ; 

 silver method. 



Positive inoculations can be 

 made on apes ; the skin of the 



eyebrows and the lid 'margins, as well as the genitals, is specially suit- 

 able for inoculation. The surface is scarified, and the syphilitic material 

 is rubbed in. In two to seven weeks a hard sore results, and the 

 usual symptoms follow. 



1 Full details of the appearances and the differential diagnosis are to be found in the 

 monograph by E. Hoffmann. 'Die Atiologie d. Syphilis,' Berlin, 1906 (J. Spinger). 



