Control of Chronic Respiratory Disease. V. Artificial Exposure of Young Chicks to Mycoplasma gallisepticum

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Abstract
Eight groups of birds con-taining approximately 100 birds each were experimentally infected with Mycoplasma gallisepticum at 1 day or 14 days of age. The percentage isolation of M. gallisepticum from the tracheas was highest 2 weeks after inoculation. A sharp decline occurred when the chicks were 8 weeks old, and this persisted during the 35- to 38-week experimental period. A low egg-transmission rate of M. gallisepticum occurred in all groups infected early. All isolations were M. gallisepticum.

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