482 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Etiologically, however, these cases are identical with those of rhinitis- 

 fibrosa — both varieties, in the opinion of the author, should be called 

 nasal diphtheria, and should be differentiated only by the addition of 

 the words "with membrane formation" or "without." Both are active 

 sources of infection, consequently all doubtful cases of rhinitis, especially 

 those which under treatment prove refractory, should be examined bac- 

 teriologically as to the presence of the JB. diphtherise, in order that 

 therapeutic injections of serum may be administered at an early stage^ 

 In many of the cases the " pseudo-bacillus " was associated with the true 

 B. diphtherise, without, however, exercising any influence on the disease. 

 Indeed, Neumann states as his opinion that the pseudo-diphtheria bacillus 

 is a harmless saprophyte. 



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