Table 1.
Serological results for clinically diagnosed dengue patients at the Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| Year | Total | Day of testing (since onset of illness) | |||||
|---|---|---|---|---|---|---|---|
| ≤ 4 days | ≥ 5 days | ||||||
| Dengue patients | Specimens tested | Positive (%) | Specimens tested | Positive (%) | Specimens tested | Positive (%) | |
| 2004 | 3,791 | 419 | 73.0 | 58 | 65.5 | 361 | 74.2 |
| 2005 | 2,816 | 655 | 75.4 | 38 | 65.8 | 617 | 76.0 |
| 2006 | 5,147 | 1,540 | 63.8 | 112 | 27.7 | 1,428 | 66.6 |
| 2007 | 6,754 | 2,769 | 72.3 | 116 | 35.3 | 2,653 | 74.0 |
| 2008 | 10,811 | 4,012 | 75.5 | 168 | 41.7 | 3,844 | 77.0 |
| 2009 | 10,172 | 2,342 | 68.5 | 150 | 34.7 | 2,192 | 70.8 |
Single plasma samples were tested for dengue virus-reactive IgM by antigen-capture ELISA.