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首页> 外文期刊>Parasitology Research >Genetic polymorphism in Trypanosoma cruzi I isolated from Brazilian Northeast triatomines revealed by low-stringency single specific primer-polymerase chain reaction.
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Genetic polymorphism in Trypanosoma cruzi I isolated from Brazilian Northeast triatomines revealed by low-stringency single specific primer-polymerase chain reaction.

机译:低严谨性单特异性引物-聚合酶链反应揭示了巴西东北三atomines中分离的克鲁斯锥虫的遗传多态性。

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摘要

Different molecular markers have been employed for typing Trypanosoma cruzi strains from endemic areas of Chagas disease. The low-stringency single specific primer-polymerase chain reaction (LSSP-PCR) has been a sensitive and informative technique that uses the variable region of kinetoplast DNA minicircles as a genetic marker, allowing detection of DNA sequence variation. In the present study, we analyzed the intra-lineage genetic variability of the T. cruzi strains obtained from triatomine feces collected on filter paper FTA card by LSSP-PCR. The hybridization of the PCR products with a probe for the subgenus Schizotrypanum and a clone-specific probe from Dm28c confirmed the subgenus as T. (S.) cruzi and respective lineages as T. cruzi I. Phenetic analysis showed the presence of three clusters that diverged by different coefficients of similarity. Thirteen T. cruzi I genotypes were observed circulating among Triatoma pseudomaculata and Rhodnius nasutus from peridomiciliary and natural environments infive peri-urban and urban localities of Jaguaruana, Ceara, Brazil. These data indicate the importance of the circulation of T. cruzi I genotypes among T. pseudomaculata and R. nasutus in different environments and the possible risk of Chagas disease domestic transmission.
机译:已经使用了不同的分子标记来对来自恰加斯病流行地区的克氏锥虫菌株进行分型。低严格性单特异性引物-聚合酶链反应(LSSP-PCR)是一项灵敏而有益的技术,该技术使用动塑料DNA小圆的可变区作为遗传标记,从而可以检测DNA序列变异。在本研究中,我们通过LSSP-PCR分析了从FTA卡滤纸上收集的三叶草粪便中获得的克鲁氏锥虫菌株的谱系内遗传变异。 PCR产物与裂殖酵母亚属探针和Dm28c克隆特异性探针的杂交证实了该亚属为T.(S.)cruzi,各谱系为T. cruziI。物候分析表明存在三个簇,因相似系数不同而异。在Jaguaruana,巴西Ceara的近郊和城市地区,在远缘和自然环境中,观察到了十三种T. cruzi I基因型在假单胞藻和罗氏菌之间的循环。这些数据表明,在不同环境中伪拟真假单胞菌和纳苏假单胞菌之间克鲁斯I基因型循环的重要性,以及南美锥虫病在国内传播的可能风险。

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