PCR was performed using ''Bio-Rad CFX96 Real-Time System'' with ''Power SYBR Green PCR master mix'' (Applied Biosystems). One reaction (25 ml total) contained: 12.5 ml of PCR master mix, 0.5 mM of each primer and 1.25 ml of DNA/cDNA template. In the single virus testing (sections 3 and 4 of the ''Results'') we used 2.5 ml of DNA/cDNA template from 20 ml of sample after cDNA synthesis. ''Universal'' PCR conditions for all primer sets included to the array were: 95uC for 8 min (one cycle), then 50 cycles of: denaturation at 95uC for 15 s, annealing and extension at 60uC for 1 min, followed by melting curve read from 65uC to 95uC with increment 0.2uC for 5 s. Real-time PCR data were downloaded in 96-well plate format from ''Bio-Rad CFX Manager 2.1'' to MS Excel and analyzed manually.