Table 2. Annual distribution of patients who were hospitalized with severe acute respiratory illness (SARI) and tested for influenza at three surveillance hospitals in Uganda, 2013–2016.
| Year | 2013 | 2014 | 2015 | 2016 | 2013–2016 |
|---|---|---|---|---|---|
| n (%) | n (%) | n (%) | n (%) | n (%) | |
| Patients hospitalized with SARI and tested for influenza | |||||
| Entebbe District Hospital | 192 (27.5) | 224 (26.8) | 109 (20.3) | 135 (22.9) | 660 (24.8) |
| Mabarara Referral Hospital | 138 (19.7) | 227 (27.1) | 171 (31.8) | 139 (23.6) | 675 (25.4) |
| Tororo District Hospital | 369 (52.8) | 386 (46.1) | 257 (47.9) | 315 (53.5) | 1,327 (49.9) |
| Total | 699 (100.0) | 837 (100.0) | 537 (100.0) | 589 (100.0) | 2,662 (100.0) |
| Patients who tested positive for influenza | 37 (5.3) | 70 (8.4) | 71 (13.2) | 23 (3.9) | 201 (7.6) |
| Influenza A | 7 (1.0) | 67 (8.0) | 61 (11.4) | 14 (2.4) | 149 (5.6) |
| Influenza B | 30 (4.3) | 3 (0.4) | 10 (1.9) | 9 (1.5) | 52 (2.0) |
| Influenza type and sub-typea | |||||
| Influenza A(H1N1)pndm09 | 3 (8.1) | 44 (62.9) | 26 (36.6) | 1 (4.4) | 74 (36.8) |
| Influenza A(H3N2) | 4 (10.8) | 24 (34.3) | 35 (49.3) | 13 (56.5) | 76 (37.8) |
| Influenza B | 30 (81.1) | 3 (4.3) | 10 (14.1) | 9 (39.1) | 52 (25.9) |
aPercentages are based on those who tested positive for influenza type A and/ or B. All the samples that tested positive for influenza A were sub-typed.