NDVP SOP for Meat 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)|
|Thereafter, two alternatives: A. 12–18 weeks B. Thereafter to maintain 25 in NSW and Victoria or 23 in Queensland and South Australia **In Western Australia and Tasmania a titre of 23 is required at 16-18 wks of age.||A. Inactivated ND vaccine B. Repeat Live V4 every 6-8 weeks|
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): 23 at 16-18 weeks of age with 66% or more of samples at or above 23.
(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:
- inactivated ND vaccine (optional)
- Continuous vaccination using V4 every 6-8 weeks is permitted. This option requires monitoring as per 3.2 and revaccination with V4 or inactivated vaccine if mean titres are below 23 and at least 66% of the birds sampled do not reach either of these targets.
(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 (all states except Tasmania and Western Australia):
3.2. 1 A mean titre of 23 or above must be demonstrated at least 3 times; at 18, 34, and 52 weeks of age (applicable to Queensland and South Australia).
3.2.2 A mean titre of 25 or above must be demonstrated at least 3 times; at 18, 34, and 52 weeks of age (applicable to NSW and Victoria).
3.3 All serological sampling is to be undertaken under veterinary supervision or a person approved by the CVO of the relevant state or territory in accordance with the approved sampling protocol.
3.4 On each occasion samples from a minimum of 15 birds must be tested to determine mean titres.
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