Abstract: In this study, intestinal tissues were obtained from quail and were kept under the temperature of (12±1)℃ for acute(0 h,30 min,3 h,12 h) and chronic(5,10,20 d) cold stress. Our aim is to explore the effects of cold stress on gut mucosal immune function of quail,through the observation of histopathology changes,in order to provide the scientific data for studying the mechanism of the effect of cold stress on gut mucosal immune system in quail. The results show that it is proved that the cold stress can cause morphological changes of the cecum and rectal in electron microscope levels.

Key words: quail; cold stress; cecum; rectal