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Table 7 Accumulated results of the clinical data from all three herds (CI and nasal discharge)

From: Longitudinal field studies reveal early infection and persistence of influenza A virus in piglets despite the presence of maternally derived antibodies

Mean CI Week 1 Week 3 Week 5 Total
Herds 1, 2 and 3
 Virus positive 0.099 0.31 0.092 0.176
 SD 0.12 0.22 0.07 0.18
 Virus negative 0.072 0.348 0.078 0.17
 SD 0.09 0.39 0.05 0.27
 P-value 0.43 0.70 0.52 0.87
Prevalence of nasal discharge
 Virus positive 65.2% (30/46) 69.6% (32/46) 74.4% (32/43) 69.6% (94/135)
 Virus negative 38% (66/174) 55.3% (88/162) 57% (89/156) 49.4% (243/492)
 P-value 0.002 0.093 0.059 < 0.0001
  1. Results were considered significant at P < 0.05. “SD” is the standard deviation.