Resumo

SOBRAL DE SOUZA, Celestina Elba et al. Evaluation of the antimicrobial and modulating activity of hexane extract from Costus cf. Arabicus L.. Rev Cubana Plant Med [online]. 2014, vol.19, n.2, pp. 151-159. ISSN 1028-4796.

Introduction: Pseudomonas aeruginosa is known to cause acute infection due to the production of toxins. Some specimens of Staphylococcus are often recognized as the etiologic agents of opportunistic infections in many animals and humans. Escherichia coli is a leading cause of human infectious diseases. The genus Candida produces several virulence factors. Infections are probably initiated by changes in host defenses. Objective: evaluate the antimicrobial effect of hexane extract of Costus cf. and themodulation of Costus cf. Arabicus. L. antibiotic activity. Methods: botanical material from Costus cf. arabicus L. was collected at Crato, Ceará, Brazil. For the preparation of extracts fresh leaves and stems were collected, separately immersed in hexane for 72 hours, and thereafter filtered and concentrated in a rotary vacuum condenser. Tests of antimicrobial activity (MIC) and antimicrobial activity modulation were conducted with multiresistant strain patterns of bacteria and fungi. Results: the extract showed antibacterial and antifungal activity against some of the strains tested when combined with some antibiotics. Conclusions: therefore, it is suggested that the extract of Costus cf. be used as a source of natural products for antimicrobial therapy and to combat bacterial and fungal multidrug resistance.

Palavras-chave : Costus cf. Arabicus L; antimicrobial activity; modification of resistance.

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