Table 3.
Characteristics of DENV strains isolated from children with different clinical severities and types of DENV infection in Vietnam in 2017
| Real-time PCR (log10 genome copies/mL) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ID | Clinical severity | Type of infection | NS1 | Virus isolation serotype | DENV-1 | DENV-2 | DENV-4 | Virus titer (log10FFU/mL) | |
| 1 | DWoWS | Sec | + | DENV-4 | – | 4.1* | 4.3* | 2.9 | |
| 2 | DwWS | Sec | + | DENV-1 | 5.9 | – | – | 3.8 | |
| 3 | DwWS | Pri | + | DENV-1 | 5.8 | – | – | 3.8 | |
| 4 | DWoWS | Sec | + | DENV-4 | – | – | 5.1 | – | |
| 5 | DwWS | Sec | + | DENV-1 | 4.0 | – | – | – | |
| 6 | DwWS | Sec | + | DENV-1 | – | – | – | – | |
| 7 | DWoWS | Sec | + | DENV-1 | 6.1 | – | – | 4.7 | |
| 8 | DwWS | Sec | + | DENV-1 | 5.9 | – | – | 4.5 | |
| 9 | DwWS | Sec | + | DENV-4 | – | – | 5.8 | – | |
| 10 | DwWS | Sec | – | DENV-1 | 5.5 | – | – | – | |
| 11 | DwWS | Pri | + | DENV-1 | 5.1 | – | – | 2.9 | |
| 12 | DwWS | Sec | + | DENV-1 | 6.3 | – | – | 4.4 | |
| 13 | DWoWS | Sec | + | DENV-1 | 6.0 | – | – | 2.7 | |
| 14 | DWoWS | Pri | + | DENV-1 | 8.0* | – | 3.9* | – | |
| 15 | DwWS | Sec | + | DENV-4 | – | – | 7.3 | 4.8 | |
| 16 | DwWS | Pri | + | DENV-1 | 7.8 | – | – | 7.0 | |
| 17 | DWoWS | Pri | + | DENV-1 | 5.7 | – | – | 3.1 | |
| 18 | DwWS | Pri | + | DENV-1 | 7.7 | – | – | 5.9 | |
| 19 | DWoWS | Sec | + | DENV-1 | – | – | 4.7 | – | |
| 20 | DWoWS | Sec | + | DENV-1 | 6.1* | - | 4.3* | 3.1 | |
DENV = dengue virus; FFU = focus-forming unit; Pri = primary infection; Sec = secondary infection.
* Mixed infection of DENV.