All samples were repeated twice to confirm
patterns of consistency in DGGE analysis. The gels
were scanned at 400 dpi. The richness (number of
DGGE bands) and similarity indices were calculated
from the densitometric curves of the scanned
DGGE profiles with Molecular Analyst 1.12
(Biorad) software, using the Pearson productmoment
correlation coefficient. Similarity indices
were calculated for pairs of DGGE profiles for feces
samples, and dendograms were produced to cluster
piglets by the similarity.