44 SEPTICAEMIA IN CHICKENS 



As already stated the lesions in this disease are so exceed- 

 ingly variable that, in addition to the more typical pneumonia, 

 almost any modification can be found. The detailed descrip- 

 tion of many of these variations as described by DieckerhofT 

 are worthy of careful stud}-. 



§ 34. Differential diagnosis. This disease is to be dif- 

 ferentiated from ( i) influenza, with which it is often confused, 

 (2) simple pneumonia following colds, and (3) the result of 

 foreign substances introduced into the bronchi. 



REFERENCES. 



1. Cadeac. Contribution a I'etiologie de la pneumonia contagieuse 

 du cheval. Comp. Rend, de la Soc. de Biol. 1889. p, 316. 



2. Fleming. Infectious pneumonia of the horse. The Veterinary 

 Jour. Vol. XXXIII p. ]. 



3. SchI'iTz. Die Ursache der Brustseuche der Pferde. Virchow' s 

 Archives. Bd. CVII. S. 356. 



4. ScHUTZ. Die genuine Lungenentziindung der Pferde. Archiv 

 fur IVissen. u. prak. Thierheilkiinde. Bd. VIII. 



5. SiEDAMGROTZKY. Ueber infectiose Pneumonien bei Pferden. 

 Deutsche Med. tVochenschrift. 1882. S. 668. 



6. Williams. Contagious pleuro-pneumonia of the horse. Am. 

 Vet. Review. Vol. XV'I (1892) p. 301. 



APOPLECTIFORM SEPTICAEMIA IN CHICKENS. 



§35. Characterization. A rapidly fatal septicaemia 

 in chickens caused by a streptococcus. 



§ 36. History. This disease was recently discovered 

 and described by Norgaard and Mohler. Although the symp- 

 toms and lesions given correspond somewhat closely to those 

 mentioned by Mazza and Rabieux, there is a marked differ- 

 ence in the etiological factor. This newl}- discovered disease 

 is based upon the findings and investigations following a 

 single epizootic among fowls. Thus far it has not been identi- 

 fied in any other locality. 



§ 37. Geographical distribution. The only locality 

 from which it has been described is I^oudoun Co., Va. 



§ 38. Etiology. This disease is stated to be due to a 

 streptococcus which grows in short or longer chains with seg- 

 ments varying from 0.6 to o.8/.< in diameter. In some cases 



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