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Background  Several species from Insecta are used as remedies. Among these species, the termite  Nasutitermes corniger  is commonly used in traditional medicine in Northeast Brazil. The present work tests the modifying antibiotic activity of  Nasutitermes corniger , a termite used in folk medicine in Northeastern region of Brazil.    Methods  Chlorpromazine and decocts of  N. corniger  were collected from two different plant species used in the traditional medicine were tested for their antimicrobial activity against strains of  Escherichia coli  resistant to aminoglycosides. The growth of two bacterial strains of  E. coli  was tested using decocts and chlorpromazine alone or associeted with aminogycosides.    Results  The MIC and MBC values were ≥1024 μg/ml for both strains of  E. coli  assayed. A significant synergism was observed between both decocts and chlorpromazine when assyed with neomycin. This synergism with neomycin indicates the involvement of an efflux system in the resistance to this aminoglycoside.    Conclusion  Therefore it is suggested that natural products from  N. corniger  could be used as a source of zoo-derived natural products with modifying antibiotic activity to aminoglycosides, being a new weapon against the bacterial resistance to antibiotics.

bmc complementary and alternative medicine

Termite usage associated with antibiotic therapy: enhancement of aminoglycoside antibiotic activity by natural products of Nasutitermes corniger (Motschulsky 1855)