Quantitative dynamics of Ambrosia pollen grains in Bulgaria
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The aerobiological study of the Ambrosia pollen in Sofia, Bulgaria began in 1991. The quantitative dynamics of Ambrosia pollen grains during the last seven years was determined by Chebishev's method of parabolic interpolation with orthogonal polynoms. Thesensitization to ragweed pollen was investigated in random groups of patients with clinical manifestation of hay fever.
This investigation proves the previouslyobserved tendency of an increase in thespreading of Ambrosia pollen in Bulgaria.
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