Abstract
In this study, DNA from 55 surface and river water samples, which were collected from some water sources of Tehran and the Guilan Province, Iran, were extracted and examined for Entamoeba spp. and Giardia lamblia by PCR and genotyping. Twenty-seven samples, which were concentrated using the immunomagnetic separation technology (IMS) method, were examined for Giardia alone. Twenty-eight samples, which were concentrated using the sucrose flotation (SF) method, were examined for both Giardia and Entamoeba species. The results showed that 27/55 (17/27 and 10/28) (49 %), 4 /28 (14.28 %) and 3/28 (10.7 %) of the samples were positive for Giardia lamblia, Entamoeba spp and mixed infections (Entamoeba spp. and Giardia spp.), respectively. Sixteen out of 55 samples were negative. Entamoeba genus-specific PCR primers in single-round PCR were used to differentiate between the Entamoeba spp. (E. histolytica, E. dispar and E. moshkovskii). With respect to the 7 samples that were positive for Entamoeba, (14.28 %) 4 out of 28 were positive for E. moshkovskii, (7.14 %), 2 out of 28 were positive for E. histolytica and (3.57 %) 1 out of 28 was positive for E. dispar. Genus-specific PCR primers in a semi-nested PCR assay was performed to genotyp...Continue Reading
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