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Post-Mortem Testing

Post mortem testing of gut and lymph node tissue samples of study farm animals was carried out as a PhD project at the University of Glasgow to assess whether testing in the abattoir is a feasible method of monitoring infection in a herd.

The abattoir samples were examined for evidence of MAP infection and compared with the results from live animal testing:

Histopathology

Negative

Positive

Total

ELISA

Negative

256

5

261

Non-negative

66

25

91

Total

322

30

352

Abattoir sampling is limited by the logistics of organising abattoir visits to collect samples from particular animals. It has been useful to screen for the presence of MAP within a herd, demonstrating its continuing presence despite sustained efforts with control programmes. However it is questionable whether this method can be seen as a “gold standard” in detecting the disease in pre-clinically infected animals, and it will not make informed culling decisions on farm any easier in low prevalence herds.

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