Guts within guts: the microbiome of the intestinal helminth parasite Ascaris suum is derived but distinct from its host.

Our data indicate that sex plays a minor role as a driver of the bacterial composition in the worm and did not achieve significance ( PERMANOVA sex : R 2 = 0.009, p > 0.05; ANOSIM Sex : R = 0.091, p > 0.05) (Fig. 4 B), while the dominant bacteria of the individual host is the most relevant driver of the bacterial composition in the worm ( PERMANOVA dominant bacteria : R 2 = 0.244, p < 0.01; ANOSIM dominant bacteria : R = 0.759, p < 0.01; PERMANOVA Individual : R 2 = 0.532, ANOSIM Individual : R = 0.485, p < 0.01) (Table 4 ).

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