Effect of the Aedes fluviatilis saliva on the development of Plasmodium gallinaceum infection in Gallus (gallus) domesticus

Memórias do Instituto Oswaldo Cruz

Ana Cvm Da Rocha²  Érika M Braga¹  Márcio Ss Araújo²  Bernardo S Franklin²  Paulo Fp Pimenta² 

[1] ,Centro de Pesquisas René Rachou-Fiocruz Laboratório de Entomologia Médica Belo Horizonte MG ,Brasil

关键词: saliva;    avian malaria;    mosquitoes;    sporozoites;    antibodies;   

DOI  :  10.1590/S0074-02762004000700008

来源: SciELO

【 摘 要 】

Effect of Aedes fluviatilis saliva on the development of Plasmodium gallinaceum experimental infection in Gallus (gallus) domesticus was studied in distinct aspects. Chickens subcutaneously infected with sporozoites in the presence of the mosquito salivary gland homogenates (SGH) showed higher levels of parasitaemia when compared to those ones that received only the sporozoites. However, the parasitaemia levels were lower among chickens previously immunized by SGH or non-infected mosquito bites compared to the controls, which did not receive saliva. High levels of anti-saliva antibodies were observed in those immunized chickens. Moreover, 53 and 102 kDa saliva proteins were recognized by sera from immunized chickens. After the sporozoite challenge, the chickens also showed significant levels of anti-sporozoite antibodies. However, the ability to generate anti-sporozoites antibodies was not correlated to the saliva immunization. Our results suggest that mosquito saliva components enhance P. gallinaceum parasite development in naive chickens. However, the prior exposure of chickens to salivary components controls the parasitemia levels in infected individuals.

【 授权许可】

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