FIG. 1.

Phylogenetic tree showing distances based on the 16S rRNA sequences obtained from isolates within insect-pathogenic nematodes that infected G. melonella. The analysis was carried out using the programs Dnadist (Jukes-Cantor maximum likelihood) and Neighbor (unweighted-pair group method using average linkages). The scale bar indicates 0.1% estimated sequence divergence. Sequences homologous to that of P. stuartii are indicated by asterisks. The strain shown is one representative of the group whose sequences differ by less than 2 bp.