The Mechanics of Treating Hatching Eggs for Disease Prevention

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Abstract
Erythromycin in the range of 800 ppm gave the highest average drug levels in eggs. Dipping times of 25-30 min. gave best results. A differential of less than 15-20[degree]C between eggs and solution gave unsatisfactory results; a differential of 37[degree]C was best. Erythromycin Powder Concentrate was superior to Gallimycin-Poultry-Formula alone and plus either 0.05% Triton X-100 or 0.45% Wescodyne. Washing eggs prior to dipping increased the number of eggs that absorbed erythromycin and the average level. Treating hatching eggs with vacuum and/or pressure may provide a method of treating eggs. A Traydex machine was satisfactory when both egg and edge of the cup were immersed in antibiotic solution. Spray treatment alone was not successful. Spray treatment of eggs held in a Traydex machine gave high levels of erythromycin when the egg and cup were sprayed.

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