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Phone: (843) 588-2001
Edgar Allan Poe/Sullivan's Island Library
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Phone: (843) 883-3914
West Ashley Library
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Wando Mount Pleasant Library
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Village Library
9 a.m. – 6 p.m.
Phone: (843) 884-9741
St. Paul's/Hollywood Library
9 a.m. – 8 p.m.
Phone: (843) 889-3300
Otranto Road Library
9 a.m. – 8 p.m.
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McClellanville Library
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Hurd/St. Andrews Library
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Host resources and parasite traits interact to determine the optimal combination of host parasite‐mitigation strategies.
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- Author(s): Dean, Andrew D.1 (AUTHOR) ; Childs, Dylan Z.2 (AUTHOR); Corripio‐Miyar, Yolanda3 (AUTHOR); Evans, Mike3,4,5 (AUTHOR); Hayward, Adam3 (AUTHOR); Kenyon, Fiona3 (AUTHOR); McNally, Luke5 (AUTHOR); McNeilly, Tom N.3 (AUTHOR); Pakeman, Robin J.6 (AUTHOR); Sweeny, Amy R.2,5 (AUTHOR); Nussey, Daniel H.5 (AUTHOR); Pedersen, Amy B.5 (AUTHOR); Fenton, Andy1 (AUTHOR)
- Source:
Ecology & Evolution (20457758). Jun2024, Vol. 14 Issue 6, p1-15. 15p.- Subject Terms:
- Source:
- Additional Information
- Abstract: Organisms have evolved diverse strategies to manage parasite infections. Broadly, hosts may avoid infection by altering behaviour, resist infection by targeting parasites or tolerate infection by repairing associated damage. The effectiveness of a strategy depends on interactions between, for example, resource availability, parasite traits (virulence, life‐history) and the host itself (nutritional status, immunopathology). To understand how these factors shape host parasite‐mitigation strategies, we developed a mathematical model of within‐host, parasite‐immune dynamics in the context of helminth infections. The model incorporated host nutrition and resource allocation to different mechanisms of immune response: larval parasite prevention; adult parasite clearance; damage repair (tolerance). We also considered a non‐immune strategy: avoidance via anorexia, reducing intake of infective stages. Resources not allocated to immune processes promoted host condition, whereas harm due to parasites and immunopathology diminished it. Maximising condition (a proxy for fitness), we determined optimal host investment for each parasite‐mitigation strategy, singly and combined, across different environmental resource levels and parasite trait values. Which strategy was optimal varied with scenario. Tolerance generally performed well, especially with high resources. Success of the different resistance strategies (larval prevention or adult clearance) tracked relative virulence of larval and adult parasites: slowly maturing, highly damaging larvae favoured prevention; rapidly maturing, less harmful larvae favoured clearance. Anorexia was viable only in the short term, due to reduced host nutrition. Combined strategies always outperformed any lone strategy: these were dominated by tolerance, with some investment in resistance. Choice of parasite mitigation strategy has profound consequences for hosts, impacting their condition, survival and reproductive success. We show that the efficacy of different strategies is highly dependent on timescale, parasite traits and resource availability. Models that integrate such factors can inform the collection and interpretation of empirical data, to understand how those drivers interact to shape host immune responses in natural systems. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Ecology & Evolution (20457758) is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Abstract:
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