Table 1.
The proportion of successful hatching, cumulative survival, and body weight gain of commercial chickens in-ovo vaccinated with different NDV strains.
| Vaccine | Dosage (log10 EID50) | Eggs | HI titer1 (log2) | % Hatched | % Survival2 | % Body weight gain 3 |
|---|---|---|---|---|---|---|
| TS09-C | 3.0 | 30 | 6.20 ± 0.84 | 93.3 (28/30)a | 93.3 (28/30)a | 239.8a |
| V4 | 3.0 | 30 | 6.00 ± 0.70 | 53.3 (16/30)b | 43.3 (13/30)b | 190.8b |
| PBS | - | 30 | 6.40 ± 1.14 | 93.3 (28/30)a | 90.0 (27/30)a | 198.5b |
a,bMeans in a same column with different superscript lowercase alphabets significantly differ (P < 0.05).
Abbreviations: HI, hemagglutinin-inhibition; NDV, Newcastle disease virus; SD, standard deviation.
1
HI titers of egg yolks collected from 5 commercial chicken embryos in each group at embryonic day 18 are expressed as log2 mean ± SD.
2
Global survival percentage of commercial chickens at 7 dph.
3
([Mean body weight at 14 dph – mean body weight at 1 dph]/mean body weight at 1 dph) × 100 (n = 10).