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PCR approach for the detection of Trypanosoma brucei and T-equiperdum and their differentiation from T-evansi based on maxicircle kinetoplast DNA



PCR approach for the detection of Trypanosoma brucei and T-equiperdum and their differentiation from T-evansi based on maxicircle kinetoplast DNA



Molecular and Cellular Probes 21(1): 1-7



The goal of this study was to develop a PCR approach based on the sequence of maxicircle kinetoplast DNA (kDNA) of Trypanosoma brucei to distinguish T brucei/T equiperdum from T. evansi and to evaluate its diagnostic use for their detection in blood samples. Primers derived from the sequence of the maxicircle kDNA of T brucei, encoding the NADH dehydrogenase subunit 5 (nad5) gene, were used to test the PCR-amplification from T brucei (including T b. brucei and T.b. rhodesiense), T equiperdum, T evansi, T vivax and T. congolense. A primer pair to a nuclear DNA region incorporated into a separate PCR was employed to control for the presence of amplifiable genomic DNA (representing the subgenus Trypanozoon)) in each sample subjected to the PCR. Products of similar to 395 bp were amplified from all T brucei and T equiperdum samples tested using the nad5-PCR, but not from T evansi DNA samples or any of the control samples representing T vivax, T congolense, or host. The current PCR approach allows the rapid differentiation of T. brucei/ T. equiperdum from T. evansi and can detect the equivalent of 20-25 cells of T. brucei or T. equiperdum in purified genomic DNA or infected blood samples.

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