Triatoma williami in intradomiciliary environments of urban areas in Mato Grosso State, Brazil: domiciliation process of a wild species?

IF 4.8 1区医学 Q1 INFECTIOUS DISEASES Infectious Diseases of Poverty Pub Date : 2022-02-14 DOI:10.1186/s40249-022-00938-4

Mirian Francisca Martins, Sinara Cristina de Moraes, Jader Oliveira, Janaina Cipriana Dos Santos, Ludier Kesser Santos-Silva, Cleber Galvão

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引用次数: 2

Abstract

Background: Triatomines in Latin America are natural Chagas disease (ChD) vectors. Triatomine domiciliation is one of the main factors increasing the occurrence risk of this disease in humans. There are 66 triatomine species in Brazil, with three genera of significant epidemiological importance-Panstrongylus, Rhodnius, and Triatoma. Among the Triatoma species, Triatoma williami, a wild species, has been reported in Goiás, Mato Grosso, and Mato Grosso do Sul. In the Barra do Garças, Mato Grosso, the invasion by triatomines has been reported, with T. williami being the most common species. This study aimed to survey triatomine fauna and determine the Trypanosoma cruzi natural infection rates in triatomines in the urban area of Barra do Garças, Mato Grosso, Brazil.

Methods: Triatomine specimens were sampled by passive surveillance or active search by agents combating endemic diseases from 2019 to 2020. A parasitological feces diagnosis was performed to detect the presence of T. cruzi after the specimens were identified. Concerning T. cruzi identification, molecular diagnosis and genetic sequencing were performed to determine the strain, also called discrete typing units (DTUs).

Results: The 211 triatomines were collected, distributed in specimens of T. williami (84.4%), P. geniculatus (3.3%), P. diasi (1.4%), and R. neglectus (10.9%). Two colonies of T. williami were found through morphological analyses. These insects were sampled inside domiciles in an urban area neighboring Jardim Pitaluga (15° 51'57.7″ N, 052° 16' 04.5 E). The records were sampled in September 2019 and January 2021. The rate of natural infection by T. cruzi was 39.4%. Two T. williami specimens from the sampled colonies were positive for the T. cruzi strain DTU IV.

Conclusions: This is the first time that T. williami has been confirmed in an urban area of Barra do Garças, Mato Grosso, Brazil. Further studies are needed for a clearer understanding of the ecology of this species for prevention and control mechanisms since its sampled specimens had a high rate of natural infection by T. cruzi.

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巴西马托格罗索州市区住宅环境中的三角瘤:一种野生物种的定居过程?

背景:拉丁美洲的锥蝽是恰加斯病(ChD)的天然媒介。Triatomine户籍是增加人类本病发生风险的主要因素之一。巴西有66种三角蝽，其中3属(panstrongylus、Rhodnius和Triatoma)具有重要的流行病学意义。其中，在Goiás、马托格罗索州和南马托格罗索州均有报道的野生种Triatoma williami。在马托格罗索州的Barra do garas，已经报道了三棱蝽的入侵，其中T. williami是最常见的物种。本研究旨在调查巴西马托格罗索州Barra do garas城区的锥蝽区系，确定锥蝽自然感染率。方法:2019 - 2020年，采用地方病防治人员主动搜索或被动监测的方法采集狐耳螨标本。标本鉴定后进行粪便寄生虫学诊断，以检测克氏锥虫的存在。在克氏体鉴定方面，通过分子诊断和基因测序来确定菌株，也称为离散分型单位(DTUs)。结果:共检获triatomines 211只，分别分布在黄颡鱼(84.4%)、黄颡鱼(3.3%)、黄颡鱼(1.4%)、黄颡鱼(10.9%)中。通过形态学分析，发现了2个美洲大蠊群落。这些昆虫在邻近Jardim Pitaluga(15°51'57.7″N, 052°16' 04.5 E)的城市地区的住宅内取样，记录于2019年9月和2021年1月取样。克氏体自然感染率为39.4%。结论:这是巴西马托格罗索州Barra do garas城市地区首次发现威廉氏T.。由于其标本自然感染克氏锥虫率高，因此需要进一步研究该物种的生态学和防治机制。

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来源期刊

Infectious Diseases of Poverty Medicine-Public Health, Environmental and Occupational Health

CiteScore

16.70

自引率

1.20%

发文量

368

审稿时长

13 weeks

期刊介绍： Infectious Diseases of Poverty is a peer-reviewed, open access journal that focuses on essential public health questions related to infectious diseases of poverty. It covers a wide range of topics and methods, including the biology of pathogens and vectors, diagnosis and detection, treatment and case management, epidemiology and modeling, zoonotic hosts and animal reservoirs, control strategies and implementation, new technologies, and their application. The journal also explores the impact of transdisciplinary or multisectoral approaches on health systems, ecohealth, environmental management, and innovative technologies. It aims to provide a platform for the exchange of research and ideas that can contribute to the improvement of public health in resource-limited settings. In summary, Infectious Diseases of Poverty aims to address the urgent challenges posed by infectious diseases in impoverished populations. By publishing high-quality research in various areas, the journal seeks to advance our understanding of these diseases and contribute to the development of effective strategies for prevention, diagnosis, and treatment.