Antagonistic interactions of "Ya-Sa-Marn-Phlae" ethanol extract in combination with topical antiseptics against clinical isolates of Staphylococcus aureus.

Sasitorn Chusri, Sirirat Tongrod, Julalak Chokpaisarn, Surasak Limsuwan, Supayang Piyawan Voravuthikunchai

BioMed research international 2014

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This investigation was aimed at assessing a possible interaction of a traditional Thai herbal recipe, "Ya-Sa-Marn-Phlae (YSMP)," used for wound treatments with topical antiseptics, povidone-iodine (PI) solution and hydrogen peroxide (H2O2), and effects of THR-SK010 alone and the combinations on Staphylococcus aureus. Antibacterial activities of ethanol extracts from the herbal recipe were determined against both methicillin resistant Staphylococcus aureus (MRSA) and methicillin-susceptible S. aureus (MSSA). YSMP exhibited remarkable antistaphylococcal activity with MIC values of 3.9-7.8 μg/mL. This recipe possessed bacteriostatic activity and did not reduce the tolerance of both MRSA and MSSA isolates to the high ionic strength. Interaction between THR-SK010 and the antiseptics was carried out by checkerboard testing and time-kill assay. Both indifferent and slightly antagonistic effects were observed with THR-SK010/PI and THR-SK010/H2O2 combinations against the tested isolates. In addition to commercially available antiseptics, THR-SK010 offered additional therapeutic options for the decolonization of MRSA and MSSA. Topical application of plant extracts with antioxidant activity, such as THR-SK010, should not be used immediately with PI or H2O2 and further investigation on this interaction is needed.

Citation

Sasitorn Chusri, Sirirat Tongrod, Julalak Chokpaisarn, Surasak Limsuwan, Supayang Piyawan Voravuthikunchai. Antagonistic interactions of "Ya-Sa-Marn-Phlae" ethanol extract in combination with topical antiseptics against clinical isolates of Staphylococcus aureus. BioMed research international. 2014;2014:867603