Table 2.
The distribution and infection patterns of viral agents according to age groups
| ≤6 months, n = 595 | 6 months –1 years, n = 408 | 1–2 years, n = 408 | 2–4 years, n = 404 | 4–6 years, n = 114 | >6 years, n = 96 | All ages, n = 2025 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| No. (%) | Mixed | No. (%) | Mixed | No. (%) | Mixed | No. (%) | Mixed | No. (%) | Mixed | No. (%) | Mixed | No. (%) | Mixed | |
| Positive | 300 (14·8)*,** | 182 (9·0)*** | 211 (10·4)*** | 197 (9·7)*** | 48 (2·4)† | 33 (1·6)† | 971 (48·0) | |||||||
| Single | 213 (21·9)†† | 126 (13·0) | 146 (15·0) | 129 (13·3) | 32 (3·3) | 23 (2·4) | 669 (68·9) | |||||||
| Mixed | 87 (9·0)†† | 56 (5·8) | 65 (6·7) | 68 (7·0) | 16 (1·6) | 10 (1·0) | 302 (31·1) | |||||||
| Negative | 295 (14·6)* | 226 (11·2) | 197 (9·7) | 207 (10·2) | 66 (3·3) | 63 (3·1) | 1054 (52·0) | |||||||
| RSV | 109 (11·2)††† | 45 (41·3)‡ | 54 (5·6) | 27 (50·0) | 57 (5·9) | 24 (42·1) | 60 (6·2) | 27 (45·0) | 8 (0·8) | 5 (62·5) | 8 (0·8) | 5 (62·5) | 296 (30·5) | 133 (44·9) |
| IAV | 97 (10·0) | 58 (59·8) | 55 (5·7) | 32 (58·2) | 90 (9·3) | 38 (42·2) | 68 (7·0) | 36 (52·9) | 25 (2·6) | 9 (36·0) | 13 (1·3) | 3 (23·1) | 348 (35·8) | 176 (50·6) |
| IBV | 6 (0·6) | 4 (66·7) | 3 (0·3) | 2 (66·7) | 3 (0·3) | 1 (33·3) | 7 (0·7) | 5 (71·4) | 2 (0·2) | 2 (100·0) | 0 (0·0) | 0 (0·0) | 21 (2·2) | 14 (66·7) |
| HRV | 66 (6·8) | 34 (51·5) | 45 (4·6) | 25 (55·6) | 44 (4·5) | 27 (61·4) | 38 (3·9) | 28 (73·7) | 9 (0·9) | 5 (55·6) | 7 (0·7) | 5 (71·4) | 209 (21·5) | 124 (59·3) |
| PIV1 | 15 (1·5) | 8 (53·3) | 14 (1·4) | 9 (64·3) | 11 (1·1) | 5 (45·5) | 13 (1·3) | 8 (61·5) | 4 (0·4) | 3 (75·0) | 2 (0·2) | 2 (100·0) | 59 (6·1) | 35 (59·3) |
| PIV3 | 32 (3·3) | 13 (40·6) | 23 (2·4) | 9 (39·1) | 26 (2·7) | 17 (65·4) | 24 (2·5) | 18 (75·0) | 5 (0·5) | 2 (40·0) | 0 (0·0) | 0 (0·0) | 110 (11·3) | 59 (53·6) |
| BOV | 23 (2·4) | 13 (56·5) | 22 (2·3) | 6 (27·3) | 26 (2·7) | 13 (50·0) | 19 (2·0) | 7 (36·8) | 6 (0·6) | 4 (66·7) | 4 (0·4) | 2 (50·0) | 100 (10·3) | 45 (45·0) |
| ADV | 25 (2·6) | 7 (28·0) | 20 (2·1) | 9 (45·0) | 14 (1·4) | 9 (64·3) | 16 (1·6) | 6 (37·5) | 5 (0·5) | 4 (80·0) | 9 (0·9) | 5 (55·6) | 89 (9·2) | 40 (44·9) |
| HMPV | 21 (2·2) | 10 (47·6) | 12 (1·2) | 5 (41·7) | 9 (0·9) | 2 (22·2) | 17 (1·8) | 7 (41·2) | 4 (0·4) | 3 (75·0) | 1 (0·1) | 0 (0·0) | 64 (6·6) | 27 (42·2) |
| WUPoyV | 11 (1·1) | 2 (18·2) | 5 (0·5) | 2 (40·0) | 6 (0·6) | 3 (50·0) | 14 (1·4) | 5 (35·7) | 2 (0·2) | 1 (50·0) | 1 (0·1) | 0 (0·0) | 39 (4·0) | 13 (33·3) |
| Episodes | 405 (41·7) | 194 (47·9) | 253 (26·1) | 126 (49·8) | 286 (29·5) | 139 (48·6) | 276 (28·4) | 148 (53·6) | 70 (7·2) | 38 (54·3) | 45 (4·6) | 22 (48·9) | 1335 (-) | 666 (49·9) |
RSV, respiratory syncytial virus; IVA, influenza virus A; IBV, influenza virus B; HRV, human rhinovirus; BOV, human bocavirus; ADV, adenovirus; HMPV, human metapneumovirus; WUPoyV, WU polyomavirus.
Case number and percentage in all enrolled children.
Incidence rate in this age group significantly higher than the other age groups.
No significant difference between these three age groups.
No significant differences between these two age groups, but significantly lower than the other age groups.
Case number and percentage in all positive patients.
Episodes of virus detected and percentage in all positive cases.
Co-infection cases of each virus detected and percentages in all cases involving virus.