Host-Schistosome Coevolution Study
Author Information
Author(s): Joanne P Webster, Jaya Shrivastava, Paul J Johnson, Lynsey Blair
Primary Institution: Department of Zoology, University of Oxford
Hypothesis
Can host-schistosome coevolution occur in an indirectly-transmitted macroparasite system?
Conclusion
The study shows that host-schistosome coevolution is possible, with host resistance being a temporary phenomenon due to rapid counter-adaptations by parasites.
Supporting Evidence
- Parasite infection rates were higher in unselected snail lines than in resistant-selected lines.
- Virulence in terms of snail mortality declined significantly with generation in resistant lines.
- Molecular analyses showed clustering of parasites based on generation and selection line.
Takeaway
This study looks at how snails and the parasites that infect them can change together over time, showing that the snails can become resistant to the parasites, but the parasites can quickly adapt to overcome that resistance.
Methodology
The study involved longitudinal co-selection trials with different host genotype combinations and cross-infection experiments.
Potential Biases
Potential biases may arise from the artificial selection of host genotypes and the controlled experimental setup.
Limitations
The study was conducted under controlled laboratory conditions, which may not fully represent natural environments.
Participant Demographics
The study focused on Biomphalaria glabrata snails and Schistosoma mansoni parasites.
Statistical Information
P-Value
0.0006
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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