. Diseases of domesticated birds. Poultry; Poultry; Birds. Fig. 5. Normal ovary. (Redrawn from Rettger, Kirkpatrick and Jones) has been hatched from eggs from a particular flock of hens is proof enough of infection in the flock, providing that there is a reasonable certainty that contamination has not been introduced by outside Sources or from infected incubators or brooders. Detection of the characteristic puUorum-infected ovaries, on post mortem examina- tion, is definite proof that the disease is prevalent in the flock. Bac-. FiG. 6. Ovary infected with B. pullorum. (Redrawn from Rettger, K

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. Diseases of domesticated birds. Poultry; Poultry; Birds. Fig. 5. Normal ovary. (Redrawn from Rettger, Kirkpatrick and Jones) has been hatched from eggs from a particular flock of hens is proof enough of infection in the flock, providing that there is a reasonable certainty that contamination has not been introduced by outside Sources or from infected incubators or brooders. Detection of the characteristic puUorum-infected ovaries, on post mortem examina- tion, is definite proof that the disease is prevalent in the flock. Bac-. FiG. 6. Ovary infected with B. pullorum. (Redrawn from Rettger, Kirkpatrick and Jones). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, Archibald Robinson, 1875-; Gallagher, Bernard Alfred, 1880-1940, joint author. New York, The Macmillan Company

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, booksubjectpou