Mixed infections and insect-pathogen interactions

被引：94

作者：

Thomas, MB ^{[1
]}

Watson, EL

Valverde-Garcia, P

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Agr Sci, Ashford TN25 5AH, Kent, England

[2] Univ London Imperial Coll Sci Technol & Med, Ctr Populat Biol, Ascot SL5 7PY, Berks, England

[3] Univ Cordoba, Dept Ciencias & Recursos Agr & Forestales, ETSIAM, E-14080 Cordoba, Spain

来源：

ECOLOGY LETTERS | 2003年 / 6卷 / 03期

关键词：

biocontrol; disease dynamics; fungal entomopathogens; insect-pathogen interactions; locusts and grasshoppers; mixed infection; super infection; virulence;

D O I：

10.1046/j.1461-0248.2003.00414.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Most studies of insect-pathogen interactions consider the direct interaction between one disease agent and one species of host. However, given that hosts are subject to challenge from many pathogen/parasite species, mixed infections are probably common. In this study, using the desert locust and two species of fungal entomopathogen, we show how mixed infection with a largely avirulent pathogen can alter the virulence and reproduction of a second, highly virulent pathogen. We find that two strains of the avirulent pathogen vary in their interaction with the virulent pathogen, depending on the order of infection and environmental conditions. We propose that avirulent pathogens, which have largely been overlooked to date, could play a significant role in host-pathogen dynamics, with implications for biological control and evolution of virulence.

引用

页码：183 / 188

页数：6

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