SUMMARY
Seven samples of silver birch pollen from different habitat of Ukraine were investigated in order to estimate their contamination with the Enterobacteriaceae family, anaerobic bacteria and fungi. It is established the concentrations of enterobacteria ranged from 0 to 5,3·104 cfu/g, of anaerobic bacteria – 0 to 28,3·104 cfu/g and concentration of fungi ranged from 1 to 5,3·104 cfu/g. It is suggested that further study of the microflora of birch pollen and its potential role in pollen allergy is needed.