Abstract
In several regions of Russia, broad distribution of RNA-containing bee viruses was found at apiaries of honey bee Apis mellifera using RT-PCR. Detected RNA-containing bee viruses are transferred simultaneously with invasion of mite Varroa destructor and lead to mass bee mortality that results in economic losses in bee breeding. In samples of Varroa destructor, bee viruses DWV and ABPV were found. High degree of RNA-containing virus (BQCV, DWV SBV, ABPV, CBPV and KBV) infection was revealed: in the average, at least 50% for bee families with mite infection. In the bee families studied in this work, mixed infection with 2-6 viruses simultaneously was detected. Amplified fragments of viruses BQCV, DWV and SBV obtained using RT-PCR were sequenced and registered in Genbank.
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