290 



BACILLI PATHOGENIC IN MAN. 



placed at equal distances ; these spots are, in all proba- 

 bility, spores. 



The bacilli do not occur free in the tissue, but are for 



the most part present 



only in large oval or 



polygonal cells, in the 

 interior of whi <* they 



two to eight, often 

 crossed or twisted 

 round one another. As 

 a rule there are only 

 relatively few bacilli in 

 the affected parts, so 

 Fig. 83A. Syphilis bacilli. Group from that at times several 



a chancre X 1050. (After Lustgarten.) .. . , 



sections must be ex- 

 amined before a cell containing bacilli is found. 



Lustgarten has been able to demonstrate these bacilli 

 in each of 16 cases of syphilis examined by him. They 

 were also found in a periosteal gumma in a case of 

 congenital syphilis ; on the other hand, they were absent 

 in two cases of soft chancre, and in numerous specimens 

 of normal and pathological organs which were examined 

 for purposes of control, 

 other methods De Giacomi, in demonstrating these bacilli, has 



of staining. 



^^^iQ:^^!^ 



Fig. 83s. Wandering cells con- 

 taining syphilis bacilli X 1050. 

 (After Lustgarten.) 



Fig. 83c. Cover glass preparation 

 from the pus from a chancre 

 showing syphilis bacilli X 1050. 

 (After Lustgarten.) 



employed a solution of chloride of iron to decolourise 

 the sections and cover glass preparations ; this method 

 has been tested and recommended by Gottstein. In 



