Trosic I, Busljeta I, Kasuba V, Rozgaj R (2002)
Adult male rats were exposed for 2h a day, 7 days a week for up to 30 days to continuous 2450 MHz radiofrequency microwaves. The power density range of 5-10 mW/ cm² corresponded to an approximate SAR of 1-2 W/kg. There were 40 rats in the experimental group and 30 in a sham-exposed group. The 40 exposed animals were divided into 4 sub-groups of ten, which were exposed for 2, 8, 15 or 30 days. At the end of each exposure period, peripheral blood smears were examined for immature erythrocytes, detected by polychromasia, and for micronuclei.
The percentage of immature erythrocytes was significantly increased at 2, 8, and 15 days in the exposed animals, suggesting that the proliferation and maturation of red blood cells were affected by the RF exposure. By the 30th day a steady-state balance of immature to mature erythrocytes had been achieved.
The incidence of micronuclei was significantly increased in the subgroup exposed to 8 days of radiation. The authors suggest that the absence of micronucleated red cells at the later stages of the experiment could have been due to the efficient removal of these cells by the spleen. In this respect the rat is different from mice (which have been used in other research studies), but similar to the human.