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Gel electrophoresis of KV ((a), 378 bp) and DWV ((b), 412 bp) products amplified by selective primers KV-F/-R and DWV-F/-R, respectively. (a,b) Lane M: 100 bp Nautia DNA Ladder (Nautia); Lane N: negative control; Lanes 1–3: A. mellifera; Lanes 4: V. destructor; Lanes 5: A. florea; and Lanes 6: E. sinhai.
