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Comparison of pathogen detection in cases of systemic PCVAD collected in the Midwestern United States in 2000/2001 (Pallarés et al., 2002) or in 2009 (Opriessnig, unpublished). Data are presented in percentages of total numbers of cases investigated (n = 485 for 2000/2001 and n = 200 for 2009).
