Figure 3.

Comparison of viral loads of co-infected_P1 (Group 1) and co-infected with Ab pigs (Group 3). Viral loads in (A) blood, (B) oral swabs, (C) fecal swabs, and (D) organs of co-infected_P1 and co-infected with Ab pigs were quantified by reverse transcription multiplex real-time polymerase chain reaction. The data represent the mean and standard deviation from three pigs. Values with different superscript letters, a–d, among the four groups of samples at the same dpi (A–C) or the same organ (D) indicate a statistically significant difference (p < 0.05) from each other. The superscript letter “a” indicates the highest viral load and “d” indicates the lowest viral load among the compared groups, while “ab” indicates a viral load in between categories “a” and “b”. No significant differences exist between values containing the same letter. The absence of a superscript letter labeled indicates no statistical analysis due to only one sample of a group or only one group within the same dpi.