112 Diseases of Poultry 



nously. These experiments are not extensive enough to prove 

 al)s()hitely that chickens cannot Ijccome typhoid carriers. 



Pfeiler and Uehsc ' have shown that while the fowl tyi)hoid 

 organism (which they renamed B. typhi gallinarum alcali- 

 faciens) is extremely ^•irulent for chickens, it does not attack 

 ducks, geese or pigeons. 



In another recent paper Smith and Ten Broeek ^ have 

 shown that the fowl cholera organism produces a toxin that 

 is very poisonous to rabbits. They suggest that possibly 

 this same organism may play a part in the food or so-called 

 ptomaine jjoisoning in man. 



In still another paper Smith and Ten Broeek ^ have shown 

 that the fowl typhoid organism shows many ])oints of re- 

 semblance to Bacillus pullorum, the cause of white diarrhea 

 in young chicks (cf. p. 295). It is only by certain fermenta- 

 tion tests that the two can be distinguished. 



A further discussion of this disease together with recom- 

 mendations for prevention are given under infectious leu- 

 kaemia on pages 186-189. 



Fowl Plague 



This disease is to be sharply separated from fowl cholera 

 with which it is often confused. So far as the writers are 

 aware this disease has never appeared in the United States. 

 It is by no means uncommon in pAirope. In spite of the fact 



1 Pfeiler, W., and Rehse, A., "Bacillus typhi gallinarum aleali- 

 faciens." Mitt. Kaiser Wilhelms Inst. f. Landwirtseliaft, Brom- 

 berg, Bd. 5, pp. 306-321, 1913. 



2 Smith, T., and Ten Broeek, C, "The Pathogenic Action of the 

 Fowl Typhoid Bacillus with Special Reference to Certain Toxins." 

 Jour, of Medical Research, Vol. 31, pp. 523-546, 1915. 



3 Smith, T.,and Ten Broeek, C, "A Note on the Relation between 

 B. pullorum (Rettger) and the Fowl Typhoid Bacillus (Moore)." 

 Jour, of Medical Research, Vol. 31, pp. 547-555, 1915. 



