Control of Chronic Respiratory Disease. VI. The Effect on Egg Transmission of Early Exposure of Chicks to Mycoplasma gallisepticum

Abstract
The exposure of 1-day-old and 2-or 4-week-old chicks reduced egg transmission to M. gallisepticum. Two of 3 flocks, however, showed infection when tested and cultured at the age of 10 or 12 wks.