Table 2.
Consensus vaccination calendar commonly used during breeding in layers in Mexico
| Age of birds | Kind of vaccine | Note |
|---|---|---|
| Week 1 | Live vectored | Usually, chicks have a high level of maternal antibodies, and the vaccination is not necessary. However, vaccination with vectored vaccines based in HVT expressing the fusion protein of NDV is used. |
| Week 2 | Live | At day 10–14 of age, a live vaccine using a lentogenic strain is administrated by drinking water. Indistinctly, VG/GA, LaSota, or P05 are used. |
| Week 3 | No vaccine | Chicks are moved to breeding cages. |
| Week 4 | Inactivated | At day 28, a boost with an inactivated (in oil) vaccine is administrated. Commonly, a unique vaccine containing multiple antigens is used. Almost never a monovalent NDV vaccine is used. |
| Week 5 | No vaccine | |
| Week 6 | No vaccine | |
| Week 8 | No vaccine | |
| Week 8 | Live | At day 55–60 of age, a live vaccine using a lentogenic strain is administrated by drinking water. Indistinctly, VG/GA, LaSota, or P05 are used. |
| Week 9 | No vaccine | |
| Week 10 | No vaccine | |
| Week 11 | Live | Between weeks 11–12 of age, a live vaccine using a lentogenic strain is administrated to birds by drinking water. Indistinctly, VG/GA, LaSota, or P05 are used. |
| Week 12 | No vaccine | |
| Week 13 | No vaccine | |
| Week 14 | No vaccine | |
| Week 15 | Inactivated | During the 15th week of age, a boost with an inactivated (in oil) vaccine is administrated to birds. Usually, a unique vaccine containing multiple antigens is used. |
| Week 16 | No vaccine | Hens are moved to production cages. |
| Week 17 | No vaccine | Hens are moved to production cages. |
| Week 18 | No vaccine | First week in production |