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| Titel: |
Occurrence of subgroup J avian leukosis virus in Taiwan |
| Auteur: |
Wang, C. -H. Juan, Y. -W. |
| Verschenen in: |
Avian pathology |
| Paginering: | Jaargang 31 (2002) nr. 5 pagina's 435-439 |
| Jaar: |
2002-10 |
| Inhoud: |
There are three grandparent farms for three different chicken breeds in Taiwan. One of these farms, populated by breast meat yield chickens (yield type), suffered from a severe subgroup J avian leukosis virus (ALV-J) infection in mid-1997. The affected flocks at that farm had a weekly mortality of more than 1% and a 15% drop in egg production. The broilers from that breed had a 10% condemnation rate during the first week of age, and 5% of the remaining broilers were stunted afterwards. Some chickens had myeloid leukosis lesions at 6 weeks old. Their survivability was about 85%. However, chickens at the other two grandparent farms, populated with non-yield chickens (regular type), were also infected by ALV-J and showed myeloid leukosis. However, chickens at these farms produced progeny whose survivability reached more than 95%. ALV-J caused greater economic loss in yield type chickens than in regular type chickens in Taiwan. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 15 van 17 gevonden artikelen
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