Formulations containing essential oils: potential for anthelmintic activity against sheep gastrointestinal nematode

Authors

  • Andiara Moraes Evangelista Barbieri Faculdade Anhanguera de Campinas, Campinas, SP
  • Helder Louvandini Universidade de São Paulo, Centro de Energia Nuclear na Agricultura, Piracicaba, SP
  • Rafael Canonenco de Araujo GRASP Indústria e Comércio, Divisão de Ruminantes, Curitiba, PR
  • Ricardo Lopes Dias da Costa Instituto de Zootecnia, Nova Odessa, SP
  • Bruno Ceneviva Fornazari Instituto de Zootecnia, Nova Odessa, SP
  • Luciana Morita Katiki Instituto de Zootecnia, Nova Odessa, SP

Keywords:

essential oils, Haemonchus contortus, sheep

Abstract

Improper use of chemicals for the Haemonchus contortus control resulted in the emergence of resistant strains. The combination of two or more bioactives, synthetic or natural, have superior effects when in comparison to single compounds, resulting in reduced doses and low toxicity of the user. In this study, Cinammaldehyde, Carvone, Carvacrol and Anethole essential oils were combined as follow: 1) Cinnamaldehyde (25%) + Carvone (50%) + Anethole (25%), 2) Cinnamaldehyde (50%) + Carvone (25%) + Carvacrol (25%) and 3) Cinnamaldehyde (25%) + Carvacrol (25%) + Anethole (25%) + Carvone (25%). Each formulation (12.48 ml) was solubilized with detergent Tween 80 (100 µl) and added 5887.52 ml of distilled water to make the main solution for in vitro hatchability test of H. contortus eggs. Decreasing concentrations of these formulations were tested (2.08 mg/ml; 1.04 mg/ml; 0.39 mg/ml; 0.15 mg/ml; 0.06 mg/ml; 0.02 mg/ml; and 0.007 mg/ml) in 100 eggs of H. contortus (6 replicates) in 48-well plate, and incubated for 24 hours at 27° C to evaluate their effectiveness. Data were analyzed with SAS Probit (SAS Inst., Inc., Cary, NC) estimating the LC50 and the independent variables (Table 1). It was concluded that the formulation 1 had the lowest LC50 of 0.020 mg/ml, suggesting better anthelmintic efficacy, followed by formulation 2, LC50 of 0.028 mg/ml and formulation 3 that showed worst efficacy with LC50 of 0.045 mg/ml.

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Published

2015-02-04

How to Cite

Formulations containing essential oils: potential for anthelmintic activity against sheep gastrointestinal nematode. (2015). Bulletin of Animal Husbandry, 71, 57-57. http://bia.iz.sp.gov.br/index.php/bia/article/view/429

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