Resistance of organisms to toxic agents is a survival mechanism fundamental for adaptation and evolution of life. As a counterpart, drug resistance is a medical problem in cancer and infectious diseases, with not many alternatives available. Entamoeba histolytica, Giardia lamblia (syn. duodenalis or intestinalis), and Trichomonas vaginalis (Fig. 1) are anaerobic and microaerophilic pathogens capable of developing drug resistance. Over one billion individuals worldwide harbor these and other anaerobic protozoa such as Blastocystis hominis, Cryptosporidium parvum, Isospora spp., Cyclospora spp., and Microsporidia (1). Most infected people live in poor countries. Unhygienic sanitary conditions and poor health education are the causes for infectious protozoan prevalence, and they can be eradicated by implementing drainage, parasite-free water supply, and sexual education for all people.
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Acknowledgments
The authors thank Dr. Arturo González Robles, Departamento de Patología Experimental, CINVESTAV IPN, México, for the parasite micrographs. The work on E. histolytica was supported by the European Economic Community and CONACYT, México.
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Orozco, E., Marchat, L.A., Gómez, C., López-Camarillo, C., Pérez, D.G. (2009). Drug Resistance Mechanisms in Entamoeba histolytica, Giardia lamblia, Trichomonas vaginalis, and Opportunistic Anaerobic Protozoa. In: Mayers, D.L. (eds) Antimicrobial Drug Resistance. Infectious Disease. Humana Press. https://doi.org/10.1007/978-1-59745-180-2_39
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