Thieme eJournals-Abstract

Anthelmintic resistance is a worldwide matter in small ruminant industry and new compounds derived from plants are being studied to be used as an additional tool to control nematodes [1,2]. Cymbopogon schoenanthus Spreng. and Cymbopogon martinii (Roxb.) J. F. Watson (family Poaceae) essential oils were chosen to be evaluated against development stages of trichostrongylids from sheep by Egg Hatch Assay (EHA), Larval Development Assay (LDA), Larval Feeding Inhibition Assay (LFIA) and Larval Exsheathment Assay (LEA). The essential oils were analyzed by gas chromatography and mass spectrometry, and their major constituents were geraniol (55.3%) and geranial (13.3%) for C. schoenanthus and geraniol (81.4%) and geranyl acetate (10.1%) for C. martinii. In all in vitro tests C. schoenanthus oil presented the best activity against ovine trichostrongylids. LC50 values are presented in Table 1. Considering these results, C. schoenanthus essential oil was selected for further experiments to evaluate its anthelmintic activity in in vivo models.