Resumo

CABRAL HASSUM, Izabella; VENTURI, Caroline Rita; GOSMANN, Grace  e  GIRARDI DEIRO, Ana M. Action of extracts of four plants against infective larvae of gastrointestinal nematodes of sheep. Rev Cubana Plant Med [online]. 2013, vol.18, n.2, pp. 278-287. ISSN 1028-4796.

Introduction: an assessment was made of the action of hydroalcoholic extracts of Eugenia uniflora L. (pitangueira), Mentha x piperita (menta), Myrcianthes pungens (O. Berg) D. Legrand (guabiju) and Peltophorum dubium (Spreng.) Taub. (cañafistula) on the development of gastrointestinal nematodes in fecal cultures from sheep. Objective: evaluate the in vitro effect of the plants upon gastrointestinal nematodes of sheep. Methods: Each extract was tested in triplicate cultures of the faeces at the following concentrations: 200 mg.mL^-1, 100 mg.mL^-1, 20 mg.mL^-1 and 2 mg.mL^-1. moxidectin (0.001 mg.mL^-1) was used as positive control, and distilled water as negative control. After incubation, the larvae were recovered, fixed and stained, and preserved for future reading. Results: the 200 mg.mL^-1 concentration of Eugenia uniflora extract was promoted to a decrease in the number of infective larvae, and was recovered from cultures of sheep faeces (number of larvae per gram of faeces = 19), in comparison with other concentrations. This value is 10 times smaller than the one recovered from coprocultures treated with the lowest concentration in the crude extract (2 mg.mL^-1). Conclusion: statistically, the action of the extract of Eugenia uniflora at the highest concentration did not differ from the positive control (p< 0.05). This is suggestive of an effect on the culture of gastrointestinal nematodes.

Palavras-chave : helminths; small ruminants; plant extract; larvae; Eugenia uniflora; Mentha x piperita; Myrcianthes pungens; Peltophorum dubium.

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