Physiological and developmental dysfunctions in the dengue vector Culex pipiens (Diptera: Culicidae) immature stages following treatment with zinc oxide nanoparticles.

The medical value of mosquitoes attracted researchers worldwide to search for a valuable way to control such serious insects. The continuous development of resistance against chemical insecticides pushed toward looking for novel and promising compounds against mosquitoes. In this study, the toxicity and physio-developmental effects of 10-30 nm spherical zinc oxide nanoparticles (ZnONPs) in aqueous suspension was addressed against the first larval instar of Culex pipiens mosquito.

Transient expression of protein tyrosine phosphatases encoded in Cotesia plutellae bracovirus inhibits insect cellular immune responses.

Several immunosuppressive factors are associated with parasitism of an endoparasitoid wasp, Cotesia plutellae, on the diamondback moth, Plutella xylostella. C. plutellae bracovirus (CpBV) encodes a large number of putative protein tyrosine phosphatases (PTPs), which may play a role in inhibiting host cellular immunity.

Protein tyrosine phosphatases encoded in Cotesia plutellae bracovirus: sequence analysis, expression profile, and a possible biological role in host immunosuppression.

A genome project has been launched and aims to sequence total genome of Cotesia plutellae bracovirus (CpBV). On this process, several putative open reading frames have been proposed, among which there was a large gene family coding for protein tyrosine phosphatases (PTPs). This study analyzed the deduced amino acid sequences of 14 CpBV-PTPs in terms of conserved domains with other known polydnaviral PTPs and determined their expression patterns in diamondback moth, Plutella xylostella, parasitized by C.

Parasitism by Cotesia plutellae alters the hemocyte population and immunological function of the diamondback moth, Plutella xylostella.

Cotesia plutellae, a solitary endoparasitoid wasp, parasitizes the diamondback moth, Plutella xylostella, and induces host immunosuppression and lethality in the late larval stage. This study focused on changes of cellular immunity in the parasitized P. xylostella in terms of hemocyte composition and cellular functions.