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来自巴西巴伊亚州和南里奥格兰德州采集的锥蝽体内的克氏锥虫菌株。

Trypanosoma cruzi strains from triatomine collected in Bahia and Rio Grande do Sul, Brazil.

作者信息

Ribeiro Aline Rimoldi, Mendonça Vagner José, Alves Renata Tomé, Martinez Isabel, Araújo Renato Freitas de, Mello Fernanda, da Rosa João Aristeu

机构信息

Departamento de Parasitologia, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, SP, Brasil.

Departamento de Ciências Biológicas, Faculdade de Ciências Farmacêuticas, Universidade Estadual Júlio de Mesquita Filho, Araraquara, SP, Brasil.

出版信息

Rev Saude Publica. 2014 Apr;48(2):295-302. doi: 10.1590/s0034-8910.2014048004719.

Abstract

OBJECTIVE

Collection of triatomines in domestic, peridomestic and sylvatic environments in states of Bahia and Rio Grande do Sul, Northeastern and Southern Brazil respectively, and isolation of Trypanosoma cruzi strains.

METHODS

First, the captured triatomines were identified using insect identification keys, then their intestinal content was examined by abdominal compression, and the samples containing trypanosomatid forms were inoculated in LIT medium and Swiss mice.

RESULTS

Six triatomine species were collected in cities in Bahia, namely Panstrongylus geniculatus (01), Triatoma melanocephala (11), T. lenti (94), T. pseudomaculata (02), T. sherlocki (26) and T. sordida (460), and two in cities in Rio Grande do Sul, namely T. circummaculata (11) and T. rubrovaria (115). Out of the specimens examined, T. cruzi was isolated from 28 triatomine divided into four different species: T. melanocephala (one), T. lenti (one), T. rubrovaria (16) and T. sordida (10). Their index of natural infection by T. cruzi was 6.4%.

CONCLUSIONS

The isolation of T. cruzi strains from triatomines found in domestic and peridomestic areas shows the potential risk of transmission of Chagas disease in the studied cities. The maintenance of those T. cruzi strains in laboratory is intended to promote studies that facilitate the understanding of the parasite-vector-host relationship.

摘要

目的

分别在巴西东北部的巴伊亚州和南部的南里奥格兰德州的家庭、家庭周边和野生环境中采集锥蝽,并分离克氏锥虫菌株。

方法

首先,使用昆虫鉴定手册对捕获的锥蝽进行鉴定,然后通过腹部挤压检查其肠道内容物,将含有锥虫形态的样本接种到LIT培养基和瑞士小鼠体内。

结果

在巴伊亚州的城市中采集到6种锥蝽,即膝形泛锥蝽(1只)、黑头锥蝽(11只)、伦氏锥蝽(94只)、拟黄斑锥蝽(2只)、夏洛克锥蝽(26只)和污色锥蝽(460只);在南里奥格兰德州的城市中采集到2种锥蝽,即环斑锥蝽(11只)和红变锥蝽(115只)。在所检查的标本中,从28只锥蝽中分离出克氏锥虫,分为4个不同的物种:黑头锥蝽(1只)、伦氏锥蝽(1只)、红变锥蝽(16只)和污色锥蝽(10只)。它们的克氏锥虫自然感染率为6.4%。

结论

从家庭和家庭周边地区发现的锥蝽中分离出克氏锥虫菌株,表明在所研究的城市中存在恰加斯病传播的潜在风险。在实验室中保存这些克氏锥虫菌株旨在促进有助于理解寄生虫-媒介-宿主关系的研究。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/442a/4206147/d21d5cef0622/rsp-48-02-0296-g01.jpg

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