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This study examined the irradiation effect of high energy x-rays on the hatching process of fertilized eggs, particularly with regard to malformation and blood cells change. The experimental groups were five day old fertilized eggs irradiated with x rays at doses of 5, 7.5, 10 Gyusing alinear accelerator. The control group was not irradiated. After three weeks, hatched chicks were sacrificed and examined for blood sampling. The survival rate of the x-ray irradiated groups were significantly lower than that of the control group( 46.7vs 80%). The malformation rate of the experimental groups was60%, whereas no congenital malformations were observed in the control group. The experimental groups had a significantly higher malformation rate. The types of malformation were left wing defect, proptosis, microcephaly, cervical spine, and feet anomaly. The incidence of malformationincreased with increasing radiation dose. The white blood cell count of control group and eachexperimental groups (5 and 7.5 Gy) were 87.64, 100.76 and 81.42 (10/μL), respectively. X-ray irradiation of 5 day old chick embryos increased the rate of death and malformation significantly.The malformations wereestimated to have occurred by chromosomal abnormalities. Further genetic studies will be neededto confirm the correlation between high energy X-rays and the cause of malformations.

Experimental study for the irradiation effect of x-ray on the hatching process of fertilized eggs