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potential inclusion in the study. Calves were screened for M bovis infection via mycoplasmal culture of serum samples and nasal swab specimens and for antibodies against M bovis via ELISA of serum samples. For each calf, the ventral meatus of a nostril

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in American Journal of Veterinary Research

with or without cough, nasal discharge, or ocular discharge) 3 Moderate illness (severe depression with or without labored breathing, cough, nasal discharge, or ocular discharge) 4 Moribund (little response to stimulus)

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in American Journal of Veterinary Research