22 
North Carolina Experiment Station 
The field observations of this department pointed toward the fact that the 
mechanical transportation of the disease from flock to flock was of para¬ 
mount importance. It is probable that the English sparrow and other wild 
birds are potential conveyors of this contagium. Positive data on the spar¬ 
row as a mechanical means of conveyance of avian typhoid is difficult to 
obtain. It is a matter of common occurrence for sparrows to utilize the feed 
troughs and drinking containers in poultry yards occupied by flocks in all 
