Anti-Staphylococcus aureus action of three Caatinga fruits evaluated by electron microscopy

Author： da Silva Luís Cláudio Nascimento   Sandes Jana Messias   de Paiva Maurício Magalhães   de Araújo Janete Magali   Figueiredo Regina Célia Bressan Queiroz de   da Silva Márcia Vanusa   Correia Maria Tereza dos Santos  

Publisher： Taylor & Francis Ltd

ISSN： 1478-6419

Source： Natural Product Research, Vol.27, Iss.16, 2013-08, pp. : 1492-1496

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Abstract

This study evaluated the antibacterial activity of Anadenanthera colubrina, Libidibia ferrea and Pityrocarpa moniliformis fruit extracts against clinical strains of Staphylococcus aureus. The samples were active for all S. aureus strains (minimum inhibitory concentration: 0.38–3.13 mg mL−1), including the multiresistant strain. The morphological changes suggested the cell wall as the main action target. The treated-cells also lose their ability to form aggregates. The analysis suggests cell wall impairment, which causes the loss of viability and death. This study showed for the first time the morphologic alterations involved in the anti-S. aureus action of fruits of A. colubrina, L. ferrea and P. moniliformis. These findings indicated that these fruit extracts are sources of bioactive compounds that can be used as antibacterial agents.

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