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Effects of blood and virus‐infected blood on protein expression in the midgut of the dengue vector Aedes albopictus

Abstract Although the mosquito midgut is the primary site of bloodmeal storage and the first line of defence against pathogenic infection, little is known about its proteic composition at a time when an increasing number of proteins are reported to impair viral infection. Aedes albopictus Skuse (Diptera: Culicidae) is an important vector of the dengue virus. We compared 2‐dimensional protein profiles of the adult midgut in this species, taking into account bloodmeal status. The comparison of profiles from sugar‐fed and blood‐fed females showed that a considerable number of proteins were present in both midguts. In addition, one set of proteins was present only after sugar intake and another set only after blood intake. The comparison of profiles of blood‐fed midguts and dengue virus‐2 infected blood‐fed midguts revealed that at least six proteins were present only in the infected midguts. These results are discussed in the context of the identification of midgut proteins involved in the dengue virus infection process.