With the purpose of studying the impact of ecological health hazard conditions on the juvenile organism, a total of 192 pupils of upper grades from schools in Donetsk, Makeyevka, Mariupol (conventionally a "dirty" zone) and 126 schoolchildren from Artemovsk and Krasnyĭ Liman (conventionally a "clean" zone) were evaluated for the immunological status. Children from the polluted zone demonstrated decreased levels of lysozyme in saliva as well as of glycogen and acid phosphatase in leucocytes, there were also deviations from the norm in the peripheral blood picture. Young residents of Mariupol appeared to have the worst findings.
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