112 Diseases of Poultry 



nously. These experiments are not extensive enough to prove 

 absolutely that chickens cannot become typhoid carriers. 



Pfeiler and Rehse ^ have shown that while the fowl typhoid 

 organism (which they renamed B. typhi gallinarum alcali- 

 faciens) is extremely virulent for chickens, it does not attack 

 ducks, geese or pigeons. 



In another recent paper Smith and Ten Broeck ^ 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 poisoning in man. 



In still another paper Smith and Ten Broeck ' have shown 

 that the fowl typhoid organism shows many points 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 Europe. In spite of the fact 



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

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

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



2 Smith, T., and Ten Broeck, 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. 



' Smith, T.,and Ten Broeck, C, "A Note on the Relation between 

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

 Jour, of Medical Research, Vol. 31, pp. 647-555, 1915. 



