Fasciolosis is a worldwide distribution zoonosis that causes great damage in ruminant breeding and has the aquatic mollusk Pseudosuccinea columella as an intermediate host. Synthetic molluscicides are the most used for control; however, they are harmful to fauna and ora. Therefore, this study aimed to evaluate the effect of essential oils from Thymus vulgaris, Origanum vulgare, and terpenecarvacrol, on adult mollusks and eggs of P. columella. Analysis of EO volatile components was carried out on a gas chromatograph equipment coupled with mass spectrometry selective detector. The studied components were diluted in concentrations of 10, 20, 40, 60, 80 and 100 ppm, and it was observed that O. vulgare at concentrations of 60, 80 and 100 ppm, carvacrol at the concentrations of 80 and 100 ppm, and T. vulgaris at a concentration of 80 ppm led to 100% mortality of mollusks. All concentrations the substances tested showed 100% ovicidal activity.
HighlightsSome essential oils are potent molluscicides. Chemical analysis of essential oils is essential to discover potential molluscicide molecules.The action of EOs can be on adulticidal mortality or on the reproduction of molluscs.
As filarioses são helmintoses comuns em cães domésticos, podendo também ocorrer em gatos, cavalos e alguns animais selvagens. As espécies envolvidas com o parasitismo levam o hospedeiro a um quadro de microfilaremia, com produção de microfilárias que são muito semelhantes entre si, dificultando o diagnóstico. O objetivo deste trabalho foi esclarecer as diferenças morfológicas entre as microfilárias dos principais filarídeos de cães, em especial Dirofilaria immitis e Acanthocheilonema reconditum. Para este estudo, amostras sanguíneas de cães do Espírito Santo foram recolhidas por laboratórios veterinários, diagnosticadas previamente como positivas por meio do esfregaço sanguíneo e encaminhadas ao Laboratório de Parasitologia do Hospital Veterinário da Universidade Federal do Espírito Santo. As amostras foram submetidas ao teste de Knott modificado e avaliadas em lâmina sob microscópio óptico para caracterização morfométrica, com base nas características morfológicas da cabeça e cauda e posterior diferenciação das espécies de microfilárias encontradas. Setenta e duas amostras foram avaliadas, sendo que 69,44% representaram infecção por D. immitis e 15,27% por A. reconditum, sendo que, destas, 12,5% equivaleram à infecção simultânea entre as duas espécies. Não foram encontradas evidências que sugerissem outras espécies de filarídeos.
Fasciolosis is a worldwide distribution zoonosis that causes great damage in ruminant breeding and has the aquatic mollusk Pseudosuccinea columella as an intermediate host. Synthetic molluscicides are the most used for control; however, they are harmful to fauna and flora. Therefore, this study aimed to evaluate the effect of essential oils from Thymus vulgaris, Origanum vulgare, and terpenecarvacrol, on adult mollusks and eggs of P. columella. Analysis of EO volatile components was carried out on a gas chromatograph equipment coupled with mass spectrometry selective detector. The studied components were diluted in concentrations of 10, 20, 40, 60, 80 and 100 ppm, and it was observed that O. vulgare at concentrations of 60, 80 and 100 ppm, carvacrol at the concentrations of 80 and 100 ppm, and T. vulgaris at a concentration of 80 ppm led to 100% mortality of mollusks. All concentrations the substances tested showed 100% ovicidal activity.
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