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Insect Infection and ImmunityEvolution, Ecology, and Mechanisms$
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Jens Rolff and Stuart Reynolds

Print publication date: 2009

Print ISBN-13: 9780199551354

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780199551354.001.0001

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Immune responses and the evolution of resistance

Immune responses and the evolution of resistance

(p.159) CHAPTER 10 Immune responses and the evolution of resistance
Insect Infection and Immunity

Jacob Koella

Oxford University Press

This chapter discusses the evolution of immune function. It emphasizes two points. First, the immune system is complex, with many responses that may act together or inhibit each other to determine the outcome of an infection. Using an immune response as an indicator of the host's resistance (or, more generally, its quality) is therefore problematic, as increased investment in a given immune response may well indicate increased susceptibility to a parasite. Second, resistance is a product of the interaction between a host and a parasite. Thus, we cannot understand the evolution of immune function without considering the co-evolution of the host's and the parasite's contributions to resistance. Indeed, as found in a more general context, mathematical models of the evolution of the host that do not consider the co-evolutionary response by the parasite can be misleading as their predictions can differ qualitatively from the co-evolutionary dynamics and equilibrium.

Keywords:   insect immunity, immune response, co-evolutionary process, immune system, resistance, host, parasite

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