Table 2. Surveillance for SARI and ILI and passive surveillance for pneumonia for avian influenza in humans, 4 Southeast Asia countries, April 1, 2013–May 30, 2014*.
| Surveillance system | No. illnesses meeting case definition | Total no. samples tested | A(H5N1), no. positive/no. tested | A(H7N9), no. positive/no. tested |
|---|---|---|---|---|
| Vietnam | ||||
| SARI | 11,558 | 2,485 | 0/798 | 0/798 |
| ILI | 29,027 | 3,770 | 0/0 | 0/0 |
| Passive surveillance for pneumonia† |
238 |
237 |
4/70 |
0/70 |
| Thailand | ||||
| SARI | ‡ | 1,025 | 0/106§ | 0/106§ |
| ILI | ‡ | 3,850 | 0/807 | 0/807 |
| Passive surveillance for pneumonia | ‡ | 157 | 0/157 | 0/43 |
| Event-based surveillance | 18 outbreaks | 162 | 0/69§ | 0/69§ |
| Surveillance for severe or fatal pneumonia |
208 |
208 |
0/14§ |
0/14§ |
| Cambodia | ||||
| SARI | 2,282 | 2,282 | 7/219 | 0/0 |
| ILI |
1,567 |
1,567 |
1/10 |
0/0 |
| Laos | ||||
| SARI | 1,469 | 698 | 0/15 | 0/15 |
| ILI | 8,962 | 1,550 | 0/0 | 0/0 |
*ILI, influenza-like illness; SARI, severe acute respiratory infection. †Severe viral pneumonia surveillance system. ‡Total number of illnesses meeting the case definition is unknown for ILI. For SARI, the number of illnesses meeting the case definition is unknown but believed to be close to 100% of persons sampled. Reporting to the passive pneumonia surveillance system is in accordance with physician discretion, and no clear case definition is applied. §A(H5N1) and A(H7N9) testing is conducted only on specimens positive for influenza A virus.