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Brushtail possums (Trichosurus vulpecula) are the major wildlife reservoir of Mycobacterium bovis, the causative agent of bovine tuberculosis (BTB), in New Zealand. Primary diagnosis of BTB in wild possums is by palpation to detect peripheral lymphadenomegaly followed by necropsy examination, which frequently identifies gross tuberculous lesions in the peripheral lymph nodes and lungs. Experimental...