TABLE 1.
Summary of reference poliovirus isolates by serotype and genotype
| Serotypea | Genotypeb | No. of specimens (n = 200) |
|---|---|---|
| PV1 | Sabin | 10 |
| VDPV1 | 11 | |
| WEAF-B1 | 15 | |
| SOAS | 22 | |
| PV2 | Sabin | 15 |
| VDPV | 16 | |
| Wild | 10 | |
| iVDPV2 | 16 | |
| PV3 | Sabin | 12 |
| VDPV | 14 | |
| WPV AFR | 13 | |
| WPV SOAS | 20 | |
| Negative | NPEVc | 15 |
| Negative | 11 |
PV1 to -3, poliovirus serotypes 1 to 3.
VDPV, vaccine-derived poliovirus; WEAF-B1, West Africa B1 genotype; SOAS, South Asia genotype; iVDPV2, immunodeficient vaccine-derived poliovirus (16 iVDPV2 virus isolates were used for assaying PV2 rRT-PCR only); WPV AFR, wild poliovirus African genotype; WPV SOAS, wild poliovirus South Asia genotype. IPV isolates of serotype 1 (Mahoney) and serotype 3 (Saukett) were positive in both EV and PanPV assays. The Mahoney strain was positive in the Sabin 1 assay and Saukett in the Sabin 3 assay (data not shown).
NPEV, nonpolio enterovirus, including coxsackievirus A4 (CV-A4), CV-A9, CV-A21, CV-B4, and CV-B5, echovirus 6 (E-6), E-9, E-11 (n = 2), and E-12, enterovirus A71 (EV-A71), EV-D68, and EV/rhinovirus, rhinovirus A47, and unknown NPEV (n = 1).