508 N. S. FERRY AND ARLYLE NOBLE 



3. The human and monkey strains of B. hronchisepticus gave 

 identical complement fixation reactions, but these two strains 

 cross-fixed with the dog strain only with larger amounts of serum. 



4. Immime sera of B. hronchisepticus did not cross-fix with 

 antigens of Perez' Bacillus. 



5. Immune sera of Perez' Bacillus did not cross-fix with anti- 

 gens of B. hronchisepticus. 



CONCLUSIONS 



According to the cultural reactions and the agglutination and 

 complement fixation tests there appear to be no reasons why 

 Perez' Bacillus should be confused with B. hronchisepticus. The 

 organisms can be differentiated from each other by any one or 

 more of the above methods. 



The results of Horn and Victors with the complement fixation 

 test have not been corroborated by us. 



REFERENCES 



Ferry, N. S. 1910 A preliminary report of the bacterial findings in canine dis- 

 temper. Am. Vet. Rev., 37, 499. 



Ferry, N. S. 1911 Etiology of canine distemper. J. Infect. Dis., 4, 399. 



HoFER, G., AND KoFLER, K. 1914 Weiterc Mitteilungen iiber die Ergebnisse 

 der Vakzinationstherapie bei genuiner Ozana mit einer aus dem Cocco- 

 bacillus fotidus ozanaee Perez. Arch. f. Laryngol., 29, 1. 



Horn, H., and Victors, E. A. 1916 A contribution to the bacteriology of the 

 so-called Coccobacillus fetidus ozenae (Perez) — , with additional notes 

 on the treatment of clinical ozena by means of polyvalent vaccines made 

 from the same organisms. Ann. Otol., Rhinol. Laryngol., 25, 251. 



M'GowAN, J. P. 1911 Some observations on a laboratory epidemic, principally 

 among dogs and cats, in which the animals affected presented the 

 symptoms of the disease called "distemper." J. Path. & Bacterid., 

 15, 372. 



Perez 1913 Die Ozana eine infectiose und kontagiose Krankheit. Berl. klin. 

 Wchnschr., 52, 2411. 



ToRREY, J. C, AND Rahe, A. H. 1913 Studies in canine distemper. J. Med. 

 Research, 27,291. 



Ward, H. C. 1917 Coccobacillus (foetidus) ozaenae of Perez. J. Infect. Dis. 

 21, 338. 



