Repellent effects of the essential oil of Lavendula angustifolia against adults of Hyalomma marginatum rufipes

M.N Mkolo,S.R Magano

doi:10.4102/jsava.v78i3.307

Abstract

The repellent effects of the essential oil of Lavendula angustifolia on adults of Hyalomma marginatum rufipes was studied at concentrations of 5, 10 and 20% v/v. A suitable tick climbing bioassay based on the questing behaviour of ticks was used to test for repellency. High percentage repellency (range 70-100) was shown at all concentrations of the essential oil of L. angustifolia, although at 5% v/v it only persisted for the first 40 minutes compared with 120 minutes at other concentrations (10 and 20% v/v). The repellent strength of L. angustifolia compared well (P > 0.05) with that of DEET (N,N-diethyl-m-toluamide), a commercial reference repellent, for the 2-hour period of the study.

Highlights

Apart from their sylvatic and domestic animal hosts, several Trichinella species infect humans; the most important species are Trichinella spiralis and Trichinella britovi (Gottstein et al 2009)
Trichinella larvae invade muscle tissue, which causes direct damage to the muscle cell during migration of larvae and indirectly by virtue of the inflammatory response of the host (Bruschi & Chiumiento 2011). This damage coincides with increased cell membrane permeability and leakage of fluid into the adjacent tissue (Kociecka 2000). This process has been linked to an increase of creatine phosphokinase (CPK), lactate dehydrogenase (LDH), aspartate transaminase (AST) and alanine transaminase (ALT) in the blood (Kociecka 2000)
The objective of this study was to evaluate the effect of T. zimbabwensis infection intensity on the levels of blood glucose, AST, ALT, CPK and LDH and on the humoral immune response of experimentally infected crocodiles

Summary

Introduction

Apart from their sylvatic and domestic animal hosts, several Trichinella species infect humans; the most important species are Trichinella spiralis and Trichinella britovi (Gottstein et al 2009). The zoonotic importance of Trichinella forms the basis for the implementation of measures aimed at the control or eradication of the parasite from the human food chain (Gottstein et al 2009; Mukaratirwa et al 2013). Trichinella larvae invade muscle tissue, which causes direct damage to the muscle cell during migration of larvae and indirectly by virtue of the inflammatory response of the host (Bruschi & Chiumiento 2011). This damage coincides with increased cell membrane permeability and leakage of fluid into the adjacent tissue (Kociecka 2000). This process has been linked to an increase of creatine phosphokinase (CPK), lactate dehydrogenase (LDH), aspartate transaminase (AST) and alanine transaminase (ALT) in the blood (Kociecka 2000)

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