Abstract
Entamoeba histolytica is a eukaryotic protozoan parasite responsible for amoebiasis. Its genetic diversity throughout the world as well as its impact on the outcome of infection is still a mystery. In the present study, a total of 774 stool samples were tested by microscopy, TechLab enzyme-linked immunosorbent assays (ELISAs) and multiplex PCR for the presence of Entamoeba histolytica. For genotype analysis, six different loci (NK, RR, AL, DA and STGA-D) of the tRNA genes were amplified by PCR. The genotyping as well as the demographic data were analyzed using the Statistical Package for Social Sciences (SPSS for WINDOWS version 21.0) program. The overall prevalence of Entamoeba species varied from 5.4% to 10.5 % and was higher in urban area. The genetic profiling of E. histolytica indicated that some strains were specific to each of the two locations while some were common. Profile Number 1 of the NK locus was more prevalent in diarrhea samples and was from Pretoria. Similarly, some profiles were more associated with diarrhea compared to others further indicating that the outcome of the infection by this parasite might be associated with the genotype. The results also indicated the possibility of strains clustering by region. The results obtained in this study confirm that tRNA genes might have a role in the presentation of amoebiasis (symptomatic and asymptomatic infections) depending on the genetic profile of the infecting strain. This genotyping system could also be used to identify the origin of the infection once it has been standardized.
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Abbreviations
- tRNA:
-
transfer Ribonucleic Acid
- ELISA:
-
Enzyme Linked Immuno-Sorbent Assay
- PCR:
-
Polymerase Chain Reaction
- NK, RR, AL, DA and STGA-D:
-
Symbols representing the different tRNA genes
- SPSS:
-
Statistical Package for Social Science
- STR:
-
Short Tandem Repeat
- DNA:
-
Deoxy-ribonucleic acid
- OD:
-
Optical density
- MEDUNSA:
-
Medical University of South Africa
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Acknowldgements
The authors express their sincere gratitude to the rural primary health care clinics management in Giyani, Limpopo Province and private clinics management in Pretoria, Gauteng Province as well as the patients for their cooperation. This study received financial support from a grant made available to Prof. A Samie through the National Research Foundation.
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The authors declare that they have no competing interests.
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Davhana, N.C., Mbati, P.A., Samie, A. (2020). Molecular Characterization of Entamoeba histolytica tRNA Genes. In: Guillen, N. (eds) Eukaryome Impact on Human Intestine Homeostasis and Mucosal Immunology. Springer, Cham. https://doi.org/10.1007/978-3-030-44826-4_21
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DOI: https://doi.org/10.1007/978-3-030-44826-4_21
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