Table 3.
Identification of CAstV and ANV in chickens in selected areas of Bangladesh (total flock = 31).
| Flock | Location | Age | Type of chicken | Flock Mortalitya (%) | FCR % | Hatch drop % | Egg production drop % | rRT-PCR results | ||
|---|---|---|---|---|---|---|---|---|---|---|
| CAstV | ANV | Comments | ||||||||
| F10 | Gazipur | 29 W | Broiler breeder | 0 | – | 5.2* | 12.23* | Neg | Neg | – |
| F11 | Gazipur | 27 W | Broiler breeder | 0 | – | 7.06* | 9.83* | Neg | Neg | – |
| F12 | Gazipur | 45 W | Broiler breeder | 0 | – | 5.42* | 16.51* | Neg | Neg | – |
| F13 | Gazipur | 41 W | Broiler breeder | 0 | – | 3.22* | 8.64* | Neg | Neg | – |
| F14 | Gazipur | 30 W | Broiler breeder | 0 | – | 7.21* | 8.41* | Neg | Neg | – |
| F15 | Gazipur | 30 W | Broiler breeder | 2.85 | – | 23.67** | 39.4** | Pos | Pos | CAstV, ANV |
| F17 | Gazipur | 25 W | Broiler breeder | 3.11 | – | 18.16** | 22.62** | Pos | Neg | CAstV |
| F18 | Gazipur | 46 W | Layer breeder | 2.04 | – | 15.33** | 24.81** | Pos | Neg | CAstV |
| F19 | Gazipur | 42 W | Broiler breeder | 3.85 | – | 17.06** | 20.39** | Pos | Neg | CAstV |
| F20 | Gazipur | 32 W | Broiler breeder | 2.77 | – | 20.52** | 26.3** | Pos | Neg | CAstV |
| F1 | Mymensingh | 24 D | Broiler | 7.29 | 1.83 | – | – | Pos | Pos | CAstV, ANV |
| F2 | Gazipur | 25 D | Broiler | 6.89 | 2.23 | – | – | Neg | Pos | ANV |
| F3 | Bogura | 25 D | Broiler | 3.44 | 1.55 | – | – | Neg | Neg | – |
| F4 | Mymensingh | 21 D | Broiler | 5.61 | 1.9 | – | – | Pos | Pos | CAstV, ANV |
| F5 | Bogura | 25 D | Broiler | 7.89 | 2.06 | – | – | Pos | Neg | CAstV |
| F6 | Gazipur | 28 D | Broiler | 4.01 | 1.62 | – | – | Neg | Neg | – |
| F7 | Mymensingh | 23 D | Broiler | 3.23 | 1.68 | – | – | Neg | Neg | – |
| F8 | Gazipur | 21 D | Broiler | 4.07 | 1.8 | – | – | Neg | Neg | – |
| F9 | Gazipur | 29 D | Broiler | 2.33 | 1.48 | – | – | Neg | Neg | – |
| F16 | Rangpur | 16 D | Broiler | 1.5 | 1.92 | – | – | Pos | Neg | CAstV |
| F21 | Gazipur | 13 D | Broiler | 5.08 | 2.17 | – | – | Pos | Pos | CAstV, ANV |
| F24 | Rangpur | 24 D | Broiler | 4.17 | 1.9 | – | – | Pos | Pos | CAstV, ANV |
| F25 | Rangpur | 24 D | Broiler | 4.06 | 1.85 | – | – | Pos | Pos | CAstV, ANV |
| F27 | Bogura | 23 D | Broiler | 4.44 | 1.77 | – | – | Neg | Neg | – |
| F28 | Bogura | 25 D | Broiler | 3.93 | 1.79 | – | – | Neg | Neg | – |
| F29 | Bogura | 29 D | Broiler | 4.08 | 1.6 | – | – | Neg | Neg | – |
| F30 | Bogura | 28 D | Broiler | 2.87 | 1.82 | – | – | Neg | Neg | – |
| F31 | Bogura | 21 D | Broiler | 4.6 | 1.85 | – | – | Neg | Neg | – |
| F22 | Gazipur | 22 W | Layer | 2.46 | – | 10.21** | 27.31** | Pos | Neg | CAstV |
| F26 | Mymensingh | 11 W | Layer | 3.74 | – | – | – | Neg | Neg | – |
| F23 | Gazipur | 13 D | Indigenous | 1.72 | – | – | – | Pos | Neg | CAstV |
*
Significant at the 0.05 level;
**
Significant at the 0.01 level.
CAstV, Chicken astrovirus; ANV, Avian nephritis virus.
a
The mortalities were recorded for 7 days from sampling day.