38 



CONTROL SERIES No. 63 



been found, it is not definitely known that the disease is disseminated by this 

 means under natural conditions. However, the sparrow should not be over- 

 looked as a possible complicating factor in the eradication of this disease. It 

 may be responsible for some of the so-called "breaks" in disease-free flocks 

 when no explanation can be presented for the introduction of the infection. 



Table 13 — Agglutination Reactions and Necropsy Results Concerning 

 Sparrows Exposed to 6". pullorum 



Group I, Inoculated by the Intraperitoneal Method. 



Group II, Inoculated by the Subcutaneous Method. 



Group III, Fed with a Pipette. 



fl8 

 19 

 20 

 r 21 



II 1 23 



24 



7 

 21,35 



No test 



No test 











4 4 4 



No test 

 



Lungs pneumonic, 

 enlarged liver and 

 spleen 



Lungs pneumonic, 

 hemorrhagic enteri- 

 tis 



Lungs pneumonic 



Lungs pneumonic, 

 enlarged spleen, hem- 

 orrhagic enteritis 



Necrotic foci in liver, 

 slight pneumonia, 

 orchitis 



Died from head 

 injuries 



Agglutination reac- 

 tion 49 days, 4-4-1-0. 

 Died from lack of 

 water 



Birds given a saline suspension of S. pullorum, turbidity equal to tube No. 1 of the McFarland 

 nephelometer, prepared from a 24-hour agar slant. 



