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. 2011 Feb;127(2):575-80.
doi: 10.1016/j.exppara.2010.10.006. Epub 2010 Nov 9.

Effects of ricinoleic acid esters from castor oil of Ricinus communis on the vitellogenesis of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) ticks

André Arnosti  1 , Paula Desjardins Brienza, Karim Christina Scopinho Furquim, Gilberto Orivaldo Chierice, Gervásio Henrique Bechara, Izabela Braggião Calligaris, Maria Izabel Camargo-Mathias
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Effects of ricinoleic acid esters from castor oil of Ricinus communis on the vitellogenesis of Rhipicephalus sanguineus (Latreille, 1806) (Acari: Ixodidae) ticks

André Arnosti et al. Exp Parasitol. 2011 Feb.

Abstract

This study examines the effects of ricinoleic acid esters from Ricinus communis castor oil on the vitellogenesis of Rhipicephalus sanguineus ticks attached to hosts that were fed with commercial rabbit food containing these esters. The oocytes of ticks from the treatment group (TG) showed cytoplasmic changes that inhibited the development of oocytes I and II to the advanced stages (IV and V) in addition to preventing the maturation of oocytes V, resulting in small ones. In addition, sperm was not observed in ampoules. Our findings confirm the acaricide potential of ricinoleic acid esters.

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