| Popis: |
One of the problems being investigated at this laboratory is the affects of White Diarrhea infection upon mature hens, their eggs and their offspring. A part of this problem involves a bacteriological study, with special reference to Salmonella pullora (Bacterium pullorum), of eggs laid by hens reacting to the serum agglutination test which is employed for detecting birds that harbor or have harbored the microorganisms causing this disease. This paper presents the results obtained this spring upon examining the eggs laid by 14 reacting White Leghorn hens which belonged to a flock of high producing birds. Considerable work has been done on this phase of the problem by other workers, notably, Rettger and Stoneburn1–2, Rettger, Kirkpatrick and Stoneburn3, Rettger4, Jones5, Gage, Paige, Hyland6, Rettger7, Hadley and Caldwell8 and May9. SOURCE OF THE HENS FURNISHING EGGS Fifteen White Leghorn hens, which had recently reacted to the macroscopic agglutination test for . . . |
