Table 1 Influenza test results for influenza-like illness (ILI) and severe acute respiratory illness (SARI) by country, year, and type/subtype in 8 West African countries, 2010–2012
From: Epidemiology of influenza in West Africa after the 2009 influenza A(H1N1) pandemic, 2010–2012
Year | Country | ILI Samples tested | SARI Samples tested | Total ILI positives (%) | Total SARI positives (%) | A(H1N1) (%) | A(H3N2) (%) | B (%) |
|---|---|---|---|---|---|---|---|---|
2010 | Burkina Faso | 174 | 0 | 6 (3.5) | 0 (0.0) | 3 (1.7) | 2 (1.1) | 1 (0.6) |
Cote d’Ivoire | 898 | 60 | 171 (19.0) | 1 (1.7) | 52 (5.4) | 57 (5.9) | 63 (6.6) | |
Mali | 2207 | 0 | 70 (3.2) | 0 (0.0) | 8 (0.4) | 44 (2.0) | 18 (0.8) | |
Mauritania | 0 | 0 | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
Niger | 298 | 88 | 61 (20.5) | 8 (9.1) | 50 (13.0) | 6 (1.6) | 13 (3.4) | |
Nigeria | 1844 | 633 | 144 (7.8) | 34 (5.4) | 104 (4.2) | 20 (0.8) | 54 (2.2) | |
Sierra Leone | 0 | 0 | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
Togo | 87 | 0 | 28 (32.2) | 0 (0.0) | 21 (24.1) | 4 (4.6) | 3 (3.4) | |
Sub Total 2010 | 5508 | 781 | 480 (8.7) | 43 (5.5) | 238 | 133 | 152 | |
2011 | Burkina Faso | 453 | 0 | 38 (8.4) | 0 (0.0) | 13 (2.9) | 3 (0.7) | 22 (4.9) |
Cote d’Ivoire | 895 | 67 | 553 (61.8) | 23 (34.3) | 211 (21.9) | 58 (6.0) | 307 (31.9) | |
Mali | 2342 | 0 | 106 (4.5) | 0 (0.0) | 26 (1.1) | 2 (0.1) | 78 (3.3) | |
Mauritania | 0 | 0 | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | |
Niger | 428 | 429 | 35 (8.2) | 17 (4.0) | 37 (4.3) | 11 (1.3) | 4 (0.5) | |
Nigeria | 2075 | 542 | 228 (11.0) | 28 (5.2) | 56 (2.1) | 87 (3.3) | 113 (4.3) | |
Sierra Leone | 299 | 223 | 39 (13.0) | 19 (8.5) | 5 (1.0) | 53 (10.2) | 0 (0.0) | |
Togo | 335 | 0 | 85 (25.4) | 0 (0.0) | 22 (6.6) | 16 (4.8) | 47 (14.0) | |
Sub Total 2011 | 6827 | 1261 | 1084 (15.9) | 87 (7.0) | 370 | 230 | 571 | |
2012 | Burkina Faso | 382 | 0 | 14 (3.7) | 0 (0.0) | 5 (1.3) | 8 (2.1) | 1 (0.3) |
Cote d’Ivoire | 1413 | 72 | 211 (14.9) | 6 (8.3) | 113 (7.6) | 83 (5.6) | 21 (1.4) | |
Mali | 3513 | 2 | 161 (4.6) | 0 (0.0) | 83 (2.4) | 56 (1.6) | 22 (0.6) | |
Mauritania | 60 | 37 | 7 (11.7) | 0 (0.0) | 0 (0.0) | 2 (2.1) | 5 (5.2) | |
Niger | 251 | 373 | 22 (8.8) | 17 (4.6) | 0 (0.0) | 25 (4.0) | 14 (2.2) | |
Nigeria | 1609 | 272 | 149 (9.3) | 12 (4.4) | 35 (1.9) | 70 (3.7) | 56 (3.0) | |
Sierra Leone | 292 | 297 | 38 (13.0) | 39 (13.1) | 23 (3.9) | 19 (3.2) | 35 (5.9) | |
Togo | 522 | 19 | 115 (22.0) | 2 (10.5) | 21 (3.9) | 49 (9.1) | 47 (8.7) | |
Sub Total 2012 | 8042 | 1070 | 717 (8.9) | 76 (7,1) | 280 | 312 | 201 | |
Total | 20,375 | 3114 | 2281 (11.2) | 206 (6.6) | 888 | 675 | 924 |