TABLE 1.
Annual incidence of viruses by age group in the Bismarck, N.D., area
| Age (yr) | Yr | No. of samples | No. of virus identifications (%)a
|
Incidence (%)b | |||
|---|---|---|---|---|---|---|---|
| RSV | Influenza virus | Parainfluenza virus | ADENO | ||||
| 1 | 87–88 | 76 | 31 (40.8) | 3 (3.9) | 8 (10.5) | 2 (2.6) | 44 (57.9) |
| 88–89 | 143 | 44 (30.8) | 16 (4.2) | 4 (2.8) | 3 (2.1) | 57 (39.9) | |
| 89–90 | 308 | 107 (34.7) | 15 (4.9) | 22 (7.1) | 13 (4.2) | 157 (51.0) | |
| 90–91 | 415 | 117 (28.2) | 15 (3.6) | 42 (10.1) | 20 (4.8) | 197 (46.8) | |
| 91–92 | 470 | 169 (36.0) | 28 (6.0) | 29 (6.2) | 9 (1.9) | 235 (50.0) | |
| 92–93 | 274 | 20 (7.3) | 27 (9.9) | 26 (9.5) | 12 (4.4) | 85 (31.0) | |
| 93–94 | 421 | 137 (32.5) | 36 (8.6) | 29 (6.0) | 13 (3.1) | 215 (51.1) | |
| 94–95 | 282 | 70 (24.8) | 10 (3.6) | 33 (11.7) | 7 (4.5) | 120 (42.6) | |
| 95–96 | 316 | 102 (32.3) | 26 (8.2) | 30 (9.5) | 11 (3.5) | 169 (53.5) | |
| 96–97 | 226 | 16 (7.1) | 28 (12.4) | 22 (9.7) | 4 (1.8) | 70 (31.0) | |
| 97–98 | 445 | 138 (31.0) | 31 (7.0) | 7 (1.6) | 2 (0.5) | 178 (40.0) | |
| Total | 3,376 | 951 (28.2) | 225 (6.7) | 252 (7.5) | 96 (2.8) | 1,524 (45.2) | |
| 1–6 | 87–88 | 38 | 13 (34.2) | 6 (15.8) | 1 (2.6) | 1 (2.6) | 21 (55.3) |
| 88–89 | 77 | 12 (15.6) | 13 (16.9) | 5 (6.5) | 5 (6.5) | 35 (45.3) | |
| 89–90 | 324 | 89 (27.5) | 44 (13.6) | 26 (8.0) | 12 (3.7) | 171 (52.8) | |
| 90–91 | 315 | 57 (18.1) | 46 (14.6) | 21 (6.7) | 15 (4.8) | 139 (44.1) | |
| 91–92 | 397 | 122 (30.7) | 38 (9.6) | 36 (9.1) | 7 (1.8) | 203 (51.1) | |
| 92–93 | 318 | 9 (2.8) | 69 (21.7) | 19 (6.0) | 11 (3.5) | 108 (40.0) | |
| 93–94 | 410 | 94 (22.9) | 120 (29.3) | 29 (7.1) | 6 (1.5) | 249 (60.7) | |
| 94–95 | 266 | 45 (16.9) | 16 (6.0) | 19 (7.1) | 27 (10.2) | 107 (40.2) | |
| 95–96 | 239 | 65 (27.2) | 29 (21.1) | 26 (10.9) | 1 (0.4) | 121 (50.6) | |
| 96–97 | 228 | 5 (2.2) | 77 (33.8) | 16 (7.0) | 3 (1.3) | 101 (44.3) | |
| 97–98 | 396 | 83 (20.1) | 48 (12.1) | 10 (2.5) | 9 (2.3) | 150 (37.9) | |
| Total | 3,008 | 594 (19.8) | 506 (16.8) | 208 (6.9) | 97 (3.2) | 1,405 (46.7) | |
| 7–25 | 87–88 | 18 | 0 0 | 6 (33.0) | 2 (11.0) | 2 (11.0) | 10 (55.6) |
| 88–89 | 34 | 1 (2.9) | 7 (20.6) | 0 0 | 0 0 | 8 (23.5) | |
| 89–90 | 115 | 13 (11.3) | 20 (17.4) | 0 0 | 0 0 | 33 (28.7) | |
| 90–91 | 117 | 3 (2.6) | 23 (19.7) | 0 0 | 2 (1.7) | 28 (23.9) | |
| 91–92 | 125 | 9 (7.2) | 25 (20.0) | 1 (0.8) | 1 (0.8) | 36 (28.8) | |
| 92–93 | 191 | 1 (0.5) | 63 (33.0) | 5 (2.6) | 4 (2.1) | 73 (38.2) | |
| 93–94 | 158 | 6 (3.8) | 48 (30.4) | 1 (0.6) | 0 0 | 55 (34.8) | |
| 94–95 | 116 | 3 (2.6) | 20 (17.2) | 4 (3.5) | 6 (5.2) | 33 (28.5) | |
| 95–96 | 132 | 2 (1.5) | 54 (40.9) | 3 (2.3) | 5 (3.8) | 64 (48.5) | |
| 96–97 | 247 | 0 0 | 93 (37.7) | 3 (1.2) | 0 0 | 96 (38.9) | |
| 97–98 | 189 | 6 (3.2) | 33 (17.4) | 2 (1.1) | 0 0 | 41 (22.0) | |
| Total | 1,442 | 44 (3.1) | 392 (27.2) | 21 (2.1) | 20 (1.4) | 477 (33.1) | |
| 26–49 | 87–88 | 11 | 0 0 | 2 (18.2) | 0 0 | 0 0 | 2 (18.2) |
| 88–89 | 34 | 0 0 | 2 (5.9) | 0 0 | 0 0 | 2 (5.9) | |
| 89–90 | 44 | 1 (2.3) | 6 (13.6) | 0 0 | 0 0 | 7 (15.9) | |
| 90–91 | 30 | 0 0 | 5 (16.7) | 0 0 | 0 0 | 5 (16.7) | |
| 91–92 | 71 | 4 (5.6) | 9 (12.7) | 1 (1.4) | 0 0 | 14 (19.7) | |
| 92–93 | 95 | 0 0 | 24 (25.3) | 4 (4.2) | 0 0 | 28 (29.5) | |
| 93–94 | 166 | 4 (2.4) | 43 (25.9) | 4 (2.4) | 1 (0.6) | 52 (31.3) | |
| 94–95 | 81 | 0 0 | 3 (3.7) | 0 0 | 8 (9.9) | 11 (13.8) | |
| 95–96 | 108 | 0 0 | 35 (32.4) | 2 (1.9) | 0 0 | 37 (34.3) | |
| 96–97 | 230 | 0 0 | 57 (24.8) | 1 (0.4) | 1 (0.4) | 59 (25.7) | |
| 97–98 | 133 | 4 (3.0) | 23 (17.3) | 0 0 | 0 0 | 27 (20.3) | |
| Total | 1,003 | 13 (1.3) | 209 (20.8) | 12 (1.2) | 10 (1.0) | 244 (24.3) | |
| >50 | 87–88 | 53 | 1 (1.9) | 5 (9.4) | 0 0 | 1 (1.9) | 7 (13.2) |
| 88–89 | 70 | 3 (4.3) | 8 (11.4) | 0 0 | 0 0 | 11 (15.7) | |
| 89–90 | 128 | 8 (6.3) | 14 (10.9) | 0 0 | 1 (0.8) | 23 (18.0) | |
| 90–91 | 36 | 0 0 | 3 (8.3) | 2 (5.6) | 0 0 | 5 (13.9) | |
| 91–92 | 147 | 12 (8.2) | 25 (17.0) | 4 (2.7) | 0 0 | 41 (27.9) | |
| 92–93 | 123 | 1 (0.8) | 17 (13.8) | 4 (3.3) | 0 0 | 22 (17.9) | |
| 93–94 | 247 | 16 (6.5) | 46 (18.6) | 8 (3.2) | 0 0 | 70 (28.3) | |
| 94–95 | 154 | 2 (1.3) | 13 (8.4) | 5 (3.2) | 0 0 | 20 (13.0) | |
| 95–96 | 188 | 13 (6.9) | 16 (8.5) | 3 (1.6) | 2 (1.1) | 33 (18.1) | |
| 96–97 | 300 | 0 0 | 46 (15.3) | 5 (1.7) | 3 (1.0) | 54 (18.0) | |
| 97–98 | 220 | 14 (6.4) | 48 (21.8) | 2 (0.9) | 0 0 | 64 (29.1) | |
| Total | 1,666 | 70 (4.2) | 241 (14.5) | 33 (2.0) | 7 (0.4) | 351 (21.1) | |
a
Number of virus identifications/number of samples tested.
b
Total number of viruses identified/number of samples tested.