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Epidemiology of BVD in New Zealand dairy herds : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Veterinary Epidemiology at Massey University, Manawatu, New Zealand

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Academic year: 2020

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Figure

Table 3: Count (and row percentage) of South Island PCR positive herds in season 1 and season 2
Table 4: Count of herds in each antibody category by season with row percentage in brackets
Figure 1: Bulk tank antibody level change between seasons with vertical lines corresponding with first season bulk tank antibody categories (none, low, moderate, high, and very high from left to right)
Figure 2: Antibody level and PCR status in all herd-season bulk tank samples (sorted by antibody level) with horizontal lines marking the cut-off values between  “none”, low, medium, high, and very high antibody categories.
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