Symbiont Reintroduction Alters Tumor Progression and Life-History Traits in the Tumor-Bearing Freshwater Cnidarian <i>Hydra oligactis</i>.

Within infected hydras, budding rate was lowest in Class D (≥ 30 ciliates), which performed significantly worse than Class B (Figure 4C ; Poisson GLMM; IRR = 0.57, 95% CI [0.39–0.83], p < 0.001), Class C (Figure 4C ; Poisson GLMM; IRR = 0.66, 95% CI [0.44–0.98], p = 0.01), and Class 0 (Figure 4C ; Poisson GLMM; IRR = 0.67, 95% CI [0.44–1.03], p = 0.02), and showed a marginal trend toward lower budding than Class A (Figure 4C ; Poisson GLMM; IRR = 0.74, 95% CI [0.50–1.09], p = 0.06).

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