Table 1
Serological and virological surveillance of Bactrian camels in the West IMAR of China
| Age, years | ||||||||
|---|---|---|---|---|---|---|---|---|
| Herd NO | Area | ≤1 | 2–4 | ≥5 | Samples /herd NO | VNT (log2) | ELISA (OD450) | RT-PCR |
| 1 | Alxa | 2 | 4 | 9 | 15/20 | <1 | 0.21–0.26 | – |
| 2 | Alxa | 0 | 3 | 13 | 16/28 | <1 | 0.17–0.25 | – |
| 3 | Alxa | 0 | 4 | 10 | 14/45 | <1 | 0.20–0.27 | – |
| 4 | Alxa | 3 | 6 | 16 | 25/65 | <1 | 0.18–0.24 | – |
| 5 | Alxa | 0 | 0 | 10 | 10/18 | <1 | 0.21–0.29 | – |
| 6 | Bayan Nur | 0 | 5 | 20 | 25/40 | <1 | 0.20–0.28 | – |
| 7 | Bayan Nur | 0 | 3 | 17 | 20/36 | <1 | 0.19–0.26 | – |
| 8 | Bayan Nur | 2 | 2 | 11 | 15/32 | <1 | 0.21–0.27 | – |
| 9 | Ordos | 0 | 4 | 28 | 32/66 | <1 | 0.17-0.28 | – |
| 10 | Ordos | 0 | 1 | 17 | 18/33 | <1 | 0.22–0.29 | – |
| Total | 7 | 32 | 151 | 190/383 | ||||
| Pre-immu. sera | 1/5 | <1 | 0.17 | ND | ||||
| Post-immu. sera | 1/5 | 9 | 0.51 | ND | ||||
ND, not done; pre-immu.sera, camel sera before rNDV-MERS-CoV-S immunization; post-immu.sera, rNDV-MERS-CoV-S-immunized camel sera; VNT, virus neutralization titer; –, negative for MERS-CoV RNA.