Abstract
EVIDENCE has been recorded which indicates that at least three avian diseases may cause abnormal egg quality. Case histories of Newcastle disease (avian pneumoencephalitis) in which decreases in albumen and shell quality were observed have been reported by Lorenz and Newlon (1944), Berg, Bearse and Hamilton (1947), and Parnell (1950). Jungherr (1948), Fabricant (1949), and Van Roekel (1950) indicate that infectious bronchitis may cause the production of eggs with thin shells and abnormal interior quality. Evidence indicating that outbreaks of pullet disease may result in the production of abnormal eggs has been presented by Van Ness (1949). This evidence focuses attention on the possibility that other poultry diseases may affect not only rate of production but also the quality of eggs produced.Several commercial poultrymen of Washington have related to the authors the observation that the quality of egg shells produced by their flocks was decreased during outbreaks of small .
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