Abstract
Metronidazole is the most-used pharmaceutical for the treatment of infection by Blastocystis. However, studies have reported resistance of the microorganism towards this pharmaceutical. In Mexico, studies concerning the prevalence of this parasite and its relationship to Irritable Bowel Syndrome have been carried out. To evaluate the in vitro effect of metronidazole and the compound 1,3-bis-(4-phenyl-[1,2,3] triazole-1-il)2-propanol over Blastocystis, as well as the prevalence of Blastocystis in patients with Irritable Bowel Syndrome. A prospective, transversal design study (April 2016–April 2017) of 51 samples of patients with Irritable Bowel Syndrome, obtained from the ISSEMyM Medical Center in Toluca, Mexico. For the identification of Blastocystis was done in three serial stool samples through direct microscopic examination and the Ritchie technique. The in vitro susceptibility test towards metronidazole and the triazolic compound was done through a microculture in concentrations of 1 to 1000 µg/mL, each one in triplicate. A 31.3% prevalence of Blastocystis was observed in the population, with greater prevalence in women (30.2%) than in men (25%). In the susceptibility test, a CL50 of 64 µg/mL was obtained for metronidazole, in comparison to the CL50 of 250 µg/mL for 1,3-bis-(4-phenyl-[1,2,3] triazole-1-il)2-propanol. This molecule in development has an effect for the treatment of infection by Blastocystis in vitro in patients with IBS and therefore, more studies should be performed.
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Acknowledgements
To CONACyT, chemist Zamudio-Chávez of HGI Valentín Gómez Farías, to the Zamser Clinical Analysis Laboratory of Ixtlahuaca and to Caballero-Vásquez, P.MD, of the ISSEMyM Medical Center of Toluca, Mexico.
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GF-L, ZC-S and SB-JG collected the samples and performed the coprological assays. GF-L, performed inoculation parasites, viability of the cells and determination of MIC, CV-P performed the Rome IV criteria used for the diagnosis of IBS. CY-E performed the Synthesis of the molecule. SB-JG and MA-E formulated the idea and MA-E, contributed with critical comments. GF-L and SB-JG obtained the authorizations. All authors participated during the discussion and writing of the manuscript and approved its final version.
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The Ethics and Research Committee of the Medical Center ISSEMyM approved the study Reference Number 015/16.
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García-Flores, L., Santillán-Benítez, J., Cuevas-Yáñez, E. et al. Evaluation of the effect of 1,3-bis-(4-phenyl-[1,2,3] triazole-1-il)2-propanol in comparison with metronidazole in an in vitro culture of Blastocystis in samples of patients with irritable bowel syndrome. J Parasit Dis 43, 506–512 (2019). https://doi.org/10.1007/s12639-019-01118-2
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DOI: https://doi.org/10.1007/s12639-019-01118-2