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© Research
Publication : Evolution; international journal of organic evolution

Genetic correlation between melanization and antibacterial immune responses in a natural population of the malaria vector Anopheles gambiae

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Evolution; international journal of organic evolution - 01 Oct 2004

Lambrechts L, Vulule JM, Koella JC

Link to Pubmed [PMID] – 15562698

Evolution 2004 Oct;58(10):2377-81

The immune system of invertebrates can mount different responses, including melanotic encapsulation and several antibacterial defense mechanisms. Variation of the efficacies of these responses is generally considered to be a product of the evolutionary pressure on each response due to infection by parasites. However, potential interactions and trade-offs among the different responses of the immune system could constrain the evolutionary potential of each response. In a natural population of the mosquito Anopheles gambiae, we measured the genetic association between the melanization response and an antibacterial response in two environmental qualities (well-fed and undernourished larvae). In both environments the two immune responses were positively genetically correlated: in full-sib families that were most likely to melanize a bead, injected bacteria were most likely to be cleared. Thus, our data do not support the idea of a trade-off among different outcomes of the invertebrate immune system, but rather that some families are overall immunologically superior to others.

http://www.ncbi.nlm.nih.gov/pubmed/15562698