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Alveolar macrophage (AM) cytokine response during infection with Bordetella bronchiseptica (Bb), porcine respiratory coronavirus (PRCV), or Bb and PRCV. AM's were isolated from infected animals, RNA isolated, and mRNA levels were assessed by real-time PCR. Data is expressed as the mean ± S.E.M. fold change in gene expression relative to mock infected animals.
