| Autor: |
M. Elizabeth Wallace, E. R. Doll, William H. McCollum |
| Rok vydání: |
1950 |
| Předmět: |
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| Zdroj: |
Poultry Science. 29:582-585 |
| ISSN: |
0032-5791 |
| DOI: |
10.3382/ps.0290582 |
| Popis: |
THE possibility of infection in newly hatched chicks from Newcastle disease virus present in the eggs of sick, recovered or vaccinated hens has received the attention of several investigators. Van Roekel (1946), Jungherr (1946 Jungherr (1947), and Thompson and Osteen (1948) isolated Newcastle disease virus from fresh eggs. Beaudette et al. (1948) isolated the virus from the ovarian yolk of affected hens. De Lay (1947) obtained Newcastle disease virus from incubated infertile eggs and from embryos which died on the 15th and 17th days of incubation. Hofstad (1949) isolated Newcastle disease virus at the 10th day of incubation from infertile eggs and dead embryos. Prier et al. (1950) isolated the virus from eggs laid on the 4th and 5th days following vaccination with living virus vaccine. De Lay (1947) reported isolation of Newcastle disease virus from the yolk-sac content of four-day-old chicks hatched from eggs collected from infected flocks. This investigation . . . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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