Journal Article

<i>In vitro</i> activity of hexadecylphosphocholine (miltefosine) against metronidazole-resistant and -susceptible strains of <i>Trichomonas vaginalis</i>

C. Blaha, M. Duchêne, H. Aspöck and J. Walochnik

in Journal of Antimicrobial Chemotherapy

Published on behalf of British Society for Antimicrobial Chemotherapy

Volume 57, issue 2, pages 273-278
Published in print February 2006 | ISSN: 0305-7453
Published online December 2005 | e-ISSN: 1460-2091 | DOI:
In vitro activity of hexadecylphosphocholine (miltefosine) against metronidazole-resistant and -susceptible strains of Trichomonas vaginalis

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Objectives: Trichomonas vaginalis is the causative agent of trichomoniasis, a sexually transmitted disease with worldwide significance. Trichomoniasis can be treated with metronidazole; however, resistant strains of T. vaginalis have been isolated and there is a lack of useful alternative drugs. The aim of the present study was to examine the activity of hexadecylphosphocholine (HePC; miltefosine), a membrane-active alkylphospholipid, that is licensed as an antileishmanial agent against T. vaginalis.

Methods: The efficacy of HePC after 30 min, 1 h, 16 h and 24 h against four different T. vaginalis strains (with varying resistance to metronidazole) was evaluated.

Results: It was shown that all isolates, including the metronidazole-resistant strains, were susceptible to HePC, with EC50s of between 8 and 40 μM and EC90s of between 8 and 80 μM depending on time and on the medium used for the experiments. Treatment of trichomonads with HePC resulted in rounding up and, at concentrations of ≥40 μM, in subsequent total lysis of the organisms.

Conclusions: HePC may be a promising new candidate for the treatment of trichomoniasis.

Keywords: protozoa; treatment; drug resistance; STD

Journal Article.  3898 words.  Illustrated.

Subjects: Medical Oncology ; Critical Care

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