Fig 3. Venn diagram of bacterial OTUs (at 97% identity) common to the pyrosequencing libraries for eggs (E), L2 larvae (L2) and workers (W) of N. arborum.

Numbers in bold indicate the number of OTUs and numbers in italics the relative abundance of the corresponding OTUs in each stage where they are detected. Details of the common OTUs are given in S2 Table.