Estimated incidence of influenza-virus-associated severe pneumonia in children in El Salvador, 2008–2010
Wilfrido Clara, Julio Armero, David Rodriguez, Celina de Lozano, Luis Bonilla, Percy Minaya, Rafael Chacón, Jorge Jara, Natalia Blanco, Marc-Alain Widdowson, Joseph Bresee, Xiyan Xu, Alexander Klimov, Eduardo Azziz-Baumgartner & Nivaldo Linares-Perez
Volume 90, Number 10, October 2012, 756-763
Table 2. Distribution of severe pneumonia cases overall and of influenza virus positivity among children aged < 5 years with severe pneumonia who underwent testing, by age and month, San Juan de Dios Hospital, Santa Ana, El Salvador, 2008–2010
| Characteristic | 2008 |
2009 |
2010 |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of cases | No. positive/no. tested | Per cent positivitya | No. of cases | No. positive/no. tested | Per cent positivitya | No. of cases | No. positive/no. tested | Per cent positivitya | |||
| Age (months) | |||||||||||
| < 12 | 347 | 6/80 | 8 | 850 | 12/121 | 10 | 394 | 2/154 | 1 | ||
| 12–23 | 97 | 3/34 | 9 | 344 | 7/52 | 13 | 187 | 2/58 | 3 | ||
| 24–59 | 51 | 2/39 | 5 | 173 | 2/44 | 5 | 111 | 1/26 | 4 | ||
| Month | |||||||||||
| Jan | 19 | 0/6 | 0 | 45 | 0/17 | 0 | 22 | 0/22 | 0 | ||
| Feb | 33 | 0/4 | 0 | 46 | 1/13 | 8 | 38 | 1/13 | 8 | ||
| Mar | 29 | 0/15 | 0 | 69 | 1/17 | 6 | 46 | 1/24 | 4 | ||
| Apr | 31 | 0/8 | 0 | 99 | 2/18 | 11 | 47 | 0/26 | 0 | ||
| May | 45 | 0/10 | 0 | 125 | 1/19 | 5 | 66 | 0/17 | 0 | ||
| Jun | 49 | 3/20 | 15 | 259 | 0/23 | 0 | 111 | 0/16 | 0 | ||
| Jul | 58 | 2/14 | 14 | 321 | 8/23 | 35 | 89 | 0/24 | 0 | ||
| Aug | 44 | 0/16 | 0 | 157 | 2/23 | 9 | 57 | 3/19 | 16 | ||
| Sep | 40 | 4/18 | 22 | 99 | 0/20 | 0 | 55 | 0/16 | 0 | ||
| Oct | 54 | 0/13 | 0 | 85 | 0/21 | 0 | 50 | 0/28 | 0 | ||
| Nov | 57 | 1/23 | 4 | 33 | 1/10 | 10 | 61 | 0/27 | 0 | ||
| Dec | 36 | 1/6 | 17 | 29 | 5/13 | 38 | 50 | 0/6 | 0 | ||
a Among patients who provided samples for testing.