NDVP SOP for Layer Breeders
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Standard Operating Procedures
(Note: in accordance with the National ND Management Plan 2008-2012, vaccination and testing requirements vary between states).
1.0 Vaccination program
|Age of birds||Type of vaccine|
|2–4 weeks a||Live V4 (MANDATORY IN ALL STATES)|
|12–18 weeks||Inactivated ND vaccine (MANDATORY IN NSW AND VICTORIA but optional in all other states)|
|12–14 weeks and every 6 to 8 weeks thereafter||Live V4 (NOT A PERMITTED OPTION IN NSW AND VICTORIA) (A permitted option in other states)|
a. In addition, where a veterinary advisor deems it is appropriate, live V4 may also be used at day-old.
2.0 Serological target for vaccination outcome
2.1 Titres are defined as adequate if they are:
(i) In Western Australia and Tasmania only (permitted option for low risk jurisdiction): A mean titre of 23 at 16-18 weeks of age with 66% or more of samples at or above 23. Can be achieved using either V4 on its own or using V4 + Inactivated ND vaccine.
(ii) In Queensland and South Australia (medium risk jurisdictions):
The following options are permitted to achieve 23 or above for the duration of the life of the bird;
- priming with live V4 at 2-4 weeks followed by Inactivated ND vaccine at 12-18 weeks of age
- Continuous vaccination using V4 every 6-8 weeks is permitted. This option requires monitoring as per 3.2 and revaccination with V4 or inactivatedND vaccine if titres are below 23.
(iii) In NSW and Victoria:
Titres are defined as adequate if from four weeks after the first vaccination with V4 the mean HI titre of the flock is at least:
(1) 23 to 18 weeks of age; and
(2) 25 thereafter with 66% or more of samples at or above 25 .
3.0 Sampling frequency (excluding Western Australia and Tasmania) depends on the vaccination program
3.1 Live V4 vaccine + Inactivated ND vaccine:
Producers using this program are not required to sample their flocks to demonstrate protection. Records must be kept to demonstrate during any audit that vaccination has taken place.
3.2 Live vaccination every 6-8 weeks:
3.2 1 A mean titre of 23 or above in at least 66% of the sampled birds must be demonstrated at least 3 times; at 18, 34, and 52 weeks of age (applicable to Queensland and South Australia).
3.2.2 If birds are kept for longer than 75weeks of age, additional sampling is required at 75 weeks of age