Rhipicephalus sanguineus (Acari: Ixodidae) female ... - BV FAPESP
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Rhipicephalus sanguineus (Acari: Ixodidae) female ticks exposed to castor oil (Ricinus communis): an ultrastructural overview

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Autor(es):
Sampieri, B. R. [1] ; Furquim, K. C. S. [1] ; Nunes, P. H. [1] ; Camargo-Mathias, M. I. [1]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Estadual Paulista, Histol Lab, BR-13506900 Sao Paulo - Brazil
Número total de Afiliações: 1
Tipo de documento: Artigo Científico
Fonte: Parasitology Research; v. 112, n. 2, p. 611-619, FEB 2013.
Citações Web of Science: 2
Resumo

Tick control has been accomplished through the use of synthetic acaricides, which has created resistant individuals, as well as contaminating the environment and nontarget organisms. Substances of plant origin, such as oils and extracts of eucalyptus and neem leaves, have been researched as an alternative to replace the synthetic acaricides. Ricinoleic acid esters from castor oil have recently been shown as a promising alternative in eliminating bacterial contamination during ethanol fermentation, by acting as an effective biocide. The same positive results have been observed when these esters are added to the food given to tick-infested rabbits. This study tested the effect of these substance on the reproductive system of Rhipicephalus sanguineus females, added to rabbit food, more specifically on oogenesis. For this, four groups were established: four control groups (CG1, CG2, CG3, and CG4) and four treatment groups (TG1, TG2, TG3, and TG4) with one rabbit in each (New Zealand White), used as hosts. After full 4 days feeding (semi-engorgement), the females were collected and had their ovaries extracted. In this study, it was observed that R. sanguineus females exposed to esters had their ovaries modified, which was demonstrated through transmission electron microscopy techniques. The addition of ricinoleic esters to the diet of tick-infested rabbits revealed how toxic such substances are for the cytoplasmic organelles of oocytes and pedicel cells. These compounds can change the morphophysiology of germ and somatic cells, consequently influencing their viability and, therefore, confirming that the ricinoleic acid esters from castor oil are a promising substance in the control of R. sanguineus. (AU)

Processo FAPESP: 09/54125-3 - EMU: aquisição de microscópio de varredura laser confocal como ferramenta para dar continuidade aos estudos morfológicos de modelos biológicos e minerais
Beneficiário:Maria Izabel Souza Camargo
Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários
Processo FAPESP: 12/02384-8 - ESPERMIOGÊNESE E EMBRIOGÊNESE COMPARADAS ENTRE ESPÉCIES DE CARRAPATOS DO GÊNERO Amblyomma (ACARI: IXODIDAE) ABORDANDO ASPECTOS FILOGENÉTICOS E DE CONTROLE QUÍMICO NATURAL
Beneficiário:Bruno Rodrigues Sampieri
Modalidade de apoio: Bolsas no Brasil - Doutorado
Processo FAPESP: 09/12387-1 - Ação dos ésteres sintetizados a partir do ácido ricinoléico sobre as glândulas salivares e os ovários de Rhipicephalus sanguineus (Acari: Ixodidae). Alterações ultraestruturais.
Beneficiário:Bruno Rodrigues Sampieri
Modalidade de apoio: Bolsas no Brasil - Mestrado