| Publication Type: | Journal Article |
| Year of Publication: | 1975 |
| Authors: | Stone, HD, Boney, Jr., WA, Coria, MF, Gillette, KG |
| Journal: | Avian Diseases |
| Volume: | 19 |
| Issue: | 1 |
| Date Published: | 1975 |
| ISBN Number: | 00052086 |
| Keywords: | Meleagris, Meleagris gallopavo, Phasianidae |
| Abstract: | Live B1 Newcastle disease virus was administered to young turkeys either intraocularly or by drinking water, or by both methods. Protection against egg production loss was evaluated by challenge-exposure to viscerotropic velogenic Newcastle disease virus in drinking water. During 22 days postchallenge (PC), none of the vaccinated hens had morbidity, whereas 44% of the unvaccinated controls died 6-13 days PC. Percent egg production (PEP) of all groups 1-5 and 6-22 days PC were compared with their levels 1-5 days before challenge. For days 1-5 PC, changes were not significant. For days 6-22 PC, changes for all groups were significantly lower. The controls had 0 production. Hens vaccinated only at 4 days or at 4 days and again at 4 weeks averaged one-third or less of prechallenge levels but were recovering. Those revaccinated at 4 months maintained 84-91% of their prechallenge levels and were considered satisfactory. Broodiness was a detracting factor in one group of hens vaccinated at 4 days, 4 weeks, and 5 1/2 months. They averaged two-thirds of prechallenge levels but were in decline. |
| URL: | http://www.jstor.org/stable/1588953 |
| Short Title: | Avian Diseases |
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