20160330 BVD Protocol FINAL

Veterinary Herd Investigation Protocol following positive test results for BVD virus

APPENDIX

RESULT

INTERPRETATION (BVD VIRUS)

ACTION

NEGATIVE

Tested negative (most recent)

Dam that has produced 1, 2, 3, n negative calves (not pi) No tissue in submitted sample (unsuitable for testing) Animal without any test result 35 days after date of birth (1) Born before 1 st January 2013 and has not been tested and has not calved OR (2) a calf that has been born less than 35 days ago without any test result. Current positive result on database where initial result was not positive/inconclusive (e.g. Initial empty result) Current inconclusive result on database where initial result was not positive/ inconclusive (e.G. Initial empty result) Initial test result is inconclusive, no re-test result Initial and confirmatory positive (or inconclusive) result Dam of an animal with a current positive (or inconclusive) result Untested offspring of a dam with a current positive (or inconclusive) result Total number of animals without a neg or indineg status Total (and details) of all cattle currently in the herd - Result not valid Initial test result is positive, no re-test result

INDINEG 1, 2, 3, N

EMPTY

Re-test required*. Tissue or blood**

INVALID

Re-test required*. Tissue or blood**

NONCOMP35

Re-test required*. Tissue or blood**

(1) Test to clarify status (result required for Negative herd status if it remains in herd). (2) Test required by legislation. Test required by legislation. Isolate; option to re-test after 3-4 weeks to confirm PI*. Consider removal without retest. Isolate; option to re-test after 3-4 weeks to confirm PI*. Isolate; option to re-test after 3-4 weeks to confirm PI*. Consider removal without retest. Isolate; option to re-test after 3-4 weeks to confirm PI* Isolate and remove as soon as possible (<7 weeks of first test)

UNKNOWN

POSITIVE

INCONCLUSIVE

INIPOS

INIINC

PI

DAMPI

Test to clarify dam status

OFFPI

Isolate and remove as soon as possible

ALL NON-NEGATIVE

Reduce to zero through above steps

ALL

*S.I. 118 of 2014 (BVD Regulations 2014) http://www.animalhealthireland.ie/page.php?id=144 ** Diagnostic gap

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