Duodenal microbial community biodiversity. Measure of estimated diversity within each biopsy sample obtained from TTGE profiles of CD patients studied during both active (A) and inactive (I) celiac disease, and controls (C). For each group, the diversity index (H'), according to Shannon-Weaver and the intra-group variance (V), are shown. The mathematical equation to calculate diversity index for each TTGE profile was with Pi = n
/Ntot, that takes in account the numbers of bands (s), their relative intensity (n
) and sum (Ntot). P values for each inter-group comparison are showed.