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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