Evaluation of Three Automated Nucleic Acid Extraction Systems for Identification of Respiratory Viruses in Clinical Specimens by Multiplex Real-Time PCR

Table 1

Distribution of respiratory viruses in 44 positive nasopharyngeal swab specimens.

Virus type	Single infection; (𝑛=33)	Dual infection; (𝑛=8)	Triple infection^a; (𝑛=3)	Total (%); (𝑛=44)
RV	10	7	2	19 (32.8)
MPV	3	2	3	8 (13.8)
PIV3	5	2	1	8 (13.8)
RSV-A	6	1	0	7 (12.1)
ADV	1	2	2	5 (8.6)
FluB	2	0	1	3 (5.2)
FluA	2	0	0	2 (3.4)
BoV	1	1	0	2 (3.4)
EV	1	1	0	2 (3.4)
CoV-OC43	1	0	0	1 (1.7)
PIV1	1	0	0	1 (1.7)
Total (%)	33 (56.9)	16 (27.6)	9 (15.5)	58 (100.0)

aRV + MPV + ADV (𝑛=1), RV + MPV + FluB (𝑛=1) and MPV + ADV + PIV3 (𝑛=1).
RV: human rhinovirus; MPV: human metapneumovirus; PIV3: human parainfluenza virus 3; RSV-A: human respiratory syncytial virus A; ADV: human adenovirus; FluB: influenza B; FluA: influenza A; BoV: human bocavirus; EV: human enterovirus; CoV-OC43: human coronavirus OC43; PIV1: human metapneumovirus.