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Laboratory diagnostic techniques for Entamoeba species Fotedar R; Stark D; Beebe N; Marriott D; Ellis J; Harkness JClin Microbiol Rev 2007[Jul]; 20 (3): 511-32, table of contentsThe genus Entamoeba contains many species, six of which (Entamoeba histolytica, Entamoeba dispar, Entamoeba moshkovskii, Entamoeba polecki, Entamoeba coli, and Entamoeba hartmanni) reside in the human intestinal lumen. Entamoeba histolytica is the causative agent of amebiasis and is considered a leading parasitic cause of death worldwide in humans. Although recent studies highlight the recovery of E. dispar and E. moshkovskii from patients with gastrointestinal symptoms, there is still no convincing evidence of a causal link between the presence of these two species and the symptoms of the host. New approaches to the identification of E. histolytica are based on detection of E. histolytica-specific antigen and DNA in stool and other clinical samples. Several molecular diagnostic tests, including conventional and real-time PCR, have been developed for the detection and differentiation of E. histolytica, E. dispar, and E. moshkovskii in clinical samples. The purpose of this review is to discuss different methods that exist for the identification of E. histolytica, E. dispar, and E. moshkovskii which are available to the clinical diagnostic laboratory. To address the need for a specific diagnostic test for amebiasis, a substantial amount of work has been carried out over the last decade in different parts of the world. The molecular diagnostic tests are increasingly being used for both clinical and research purposes. In order to minimize undue treatment of individuals infected with other species of Entamoeba such as E. dispar and E. moshkovskii, efforts have been made for specific diagnosis of E. histolytica infection and not to treat based simply on the microscopic examination of Entamoeba species in the stool. The incorporation of many new technologies into the diagnostic laboratory will lead to a better understanding of the public health problem and measures to control the disease.|Animals[MESH]|Antibodies, Protozoan/analysis[MESH]|Antigens, Protozoan/analysis[MESH]|Chromatography[MESH]|DNA, Protozoan/genetics[MESH]|Entamoeba/enzymology/genetics/immunology/*isolation & purification[MESH]|Entamoebiasis/*diagnosis[MESH]|Enzyme-Linked Immunosorbent Assay[MESH]|Humans[MESH]|Isoenzymes/analysis[MESH]|Nucleic Acid Amplification Techniques[MESH]|Oligonucleotide Array Sequence Analysis[MESH]|Polymerase Chain Reaction[MESH]|Protozoan Proteins/analysis[MESH] |
