Table 1.
Distribution of avian leukosis virus (ALV) p27 ELISA results at the individual- animal level regarding sex, age, and breed categories
| ALV p27-ELISA | |||||
|---|---|---|---|---|---|
| Trait | Group | n samples (%) | n positive/indeterminate (%) | n negative (%) | p-value |
| Sex* | Male | 115/527 (21.8) | 34/115 (29.6) | 81/115 (70.4) | 0.689 |
| Female | 412/527 (78.2) | 114/412 (27.7) | 298/412 (72.3) | ||
| Age* | Young (≤1 year) | 304/527 (57.7) | 86/304 (28.3) | 218/304 (71.7) | 0.902 |
| Old (>1 year) | 223/527 (42.3) | 62/223 (27.8) | 161/223 (72.2) | ||
| Breed (body size) | Large breeds | 247/537 (46.0) | 73/247 (29.6) | 174/247 (70.4) | 0.947 |
| Dwarf breeds | 197/537 (36.7) | 56/197 (28.4) | 141/197 (71.6) | ||
| Original bantam breeds | 93/537 (17.3) | 28/93 (30.1) | 65/93 (69.9) | ||
| Breed (origin) | Breeds of Asian origin | 198/537 (36.9) | 45/198 (22.7) | 153/198 (77.3) | <0.001 |
|
North-Western European breeds, intermediate type breeds |
47/537 (8.8) | 4/47 (8.5) | 43/47 (91.5) | ||
|
Mediterranean breeds, East-European breeds |
79/537 (14.7) | 49/79 (62.0) | 30/79 (38.0) | ||
| Gamecock breeds and related | 92/537 (17.1) | 18/92 (19.6) | 74/92 (80.4) | ||
|
Miscellaneous (original bantam breeds, crested chicken breeds) |
121/537 (22.5) | 41/121 (33.9) | 80/121 (66.1) | ||
* 10 samples from chickens of unknown sex and age