تلخیص
Electromagnetic field have various effects on living organisms such as blood composition or enzymatic changes. The effects devoted on the electromagnetic magnitude and time of exposure. This study is carried out to measure variations of RBC, WBC, Lymphocyte and Cortisol Hormone level in 36 adult male Guinea pig. Group A as control group exposed to nil electromagnetic field for 2 h per day for 5 days duration , group B exposed to 0.013 µT in 5 Hz to the same duration period , group C exposed to 0.207 µT in 50 Hz in similar condition , group D exposed for 4 h per day for 5 days in 0.013 µT, group E tested in 0.207 µT as group D , group F used as controlled group exposed for 4 h per day in nil electromagnetic field. Blood of Guinea pig tested after 5 days then data analyzed by Dunnett test and one way ANOVA that indicated a significant difference between control group and tested group of four hours, RBC, WBC and Lymphocyte level decreased , only WBC in group C increased but Cortisol Hormone in group C decreased .