Souza Cristian Ferreira de, Santos Carlos Alberto Dos, Bevilacqua Paula Dias, Andrade Filho José Dilermando, Brazil Reginaldo Peçanha
Laboratório de Doenças Parasitárias, Instituto Oswaldo Cruz (Fiocruz), Avenida Brasil, 4365, Manguinhos, Rio de Janeiro 21040-360, RJ, Brazil.
Centro de Controle de Zoonoses, Prefeitura Municipal de Timóteo, Avenida Acesita, 3230, São José, Timóteo 35182-000, MG, Brazil.
Trop Med Infect Dis. 2024 Jun 13;9(6):133. doi: 10.3390/tropicalmed9060133.
Leishmaniasis is a group of diseases caused by protozoa of the genus and is transmitted by the bite female sand fly. The present work is characterized as a descriptive study in two areas: a forest area located in the Parque Estadual do Rio Doce, and another urban area located in the municipality of Timóteo-MG, with the objective of identifying the presence of spp. and the blood source of the collected female sand flies. Part of the females were obtained from the Parque Estadual do Rio Doce, and part was collected using 19 ligth traps distributed in residences of Timóteo. For molecular studies of spp. DNA, the ITS1 gene was used, and in the search for blood source, the CytB gene was used and positive samples were sequenced. The study demonstrated that there are at least three species of circulating in the study areas: () , () , and (.) . was the predominant sand fly species in the urban area of Timóteo with a positive diagnosis for the presence of DNA. We found the presence of blood from (Chicken) and (Pig) in sand flies. The present study demonstrates that is the main agent of cutaneous leishmaniasis in the study area, with the effective participation of as the vector and both and acting as a food source for female sand flies, and helping maintaining the sand fly life.
利什曼病是由利什曼原虫属的原生动物引起的一组疾病,通过雌性白蛉叮咬传播。本研究的特点是在两个地区进行描述性研究:一个位于多西河州立公园的森林地区,另一个位于米纳斯吉拉斯州蒂莫特奥市的城市地区,目的是确定利什曼原虫属物种的存在以及所采集雌性白蛉的血液来源。部分雌性白蛉取自多西河州立公园,部分是使用分布在蒂莫特奥居民住宅中的19个诱虫灯收集的。对于利什曼原虫属物种DNA的分子研究,使用了ITS1基因,在寻找血液来源时,使用了CytB基因,并对阳性样本进行了测序。研究表明,在研究区域至少有三种利什曼原虫在传播:亚马逊利什曼原虫(L. amazonensis)、巴西利什曼原虫(L. braziliensis)和墨西哥利什曼原虫(L. mexicana)。在蒂莫特奥市区,亚马逊利什曼原虫是白蛉的主要物种,对其DNA的存在诊断呈阳性。我们在白蛉中发现了鸡(Gallus gallus)和猪(Sus scrofa)的血液。本研究表明,亚马逊利什曼原虫是研究区域皮肤利什曼病的主要病原体,巴西利什曼原虫作为传播媒介有效参与其中,鸡和猪都作为雌性白蛉的食物来源,有助于维持白蛉的生存。