Abstract
C ONSIDERABLE interest has been shown in the dipping of hatching eggs in antibiotics to prevent egg transmission of Mycoplasma. Chalquest and Fabricant' immersed eggs in various concentrations of streptomycin, oxytetracycline (OTC), and erythromycin (ERY) for different periods. They found no effect of treatment on hatchability. Mycoplasma in several dilutions was introduced into fresh eggs that had been immersed in solutions of OTC and ERY. The dipping markedly reduced the numbers of Mycoplasma isolated from the embryos. The work reported here was undertaken in cooperation with a commercial hatchery to determined the effect that dipping eggs in ERY has on: 1) the presence of Mycoplasma in pipped embryos: 2) hatchability; and 3) broiler performance, especially in relation to the control of chronic respiratory disease.
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