Enzootic transmission of Leishmania spp. in gallery forests of the Brazilian Cerrado.

IF 1.2 4区农林科学 Q2 Veterinary Revista Brasileira De Parasitologia Veterinaria Pub Date : 2024-12-06 eCollection Date: 2024-01-01 DOI:10.1590/S1984-29612024073

Aline Rapello, Andrey José de Andrade, Nadjar Nitz, Thaís Tâmara Castro Minuzzi-Sousa, Tamires Emanuele Vital, Tauana de Sousa Ferreira, Douglas de Almeida Rocha, Marcos Takashi Obara, Renata Velôzo Timbó, Jônatas Barbosa Cavalcante Ferreira, Rodrigo Gurgel-Gonçalves

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Abstract

Gallery forests harbor mammals and sand flies that may be involved in the transmission of Leishmania spp. parasites. Characterizing the enzootic cycles of Leishmania spp. is essential for understanding its transmission dynamics. We analyzed the presence of Leishmania spp. in mammals and sand flies in gallery forests during the dry season in the Cerrado. Four gallery forests were investigated in May and September 2014. Our capture effort included 1,280 HP trap-nights, 16 Shannon trap-nights for sand flies, and 5,120 trap-nights for mammals. After identifying the mammalian and sand fly species, SSU rRNA and ITS-1 polymerase chain reaction (PCR) were used to detect Leishmania spp. A total of 1,209 sand flies belonging to 13 species were captured, mainly Bichromomyia flaviscutellata. Leishmania spp. DNA was not detected in the analyzed sand fly females. PCR analysis of 153 mammals revealed Leishmania spp. in 20 samples (13%) in May (early dry season), when the infection rate was 31% in one gallery forest. The host species were Rhipidomys macrurus, Gracilinanus agilis, and Didelphis albiventris. We observed a low frequency of mammals infected with Leishmania spp., which was not detected in sand flies. Our results indicate that Leishmania spp. infection is higher in mammals during the early dry season in Cerrado gallery forests.

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巴西塞拉多廊道森林利什曼原虫的地方性传播。

走廊森林中栖息着哺乳动物和沙蝇，它们可能参与了利什曼原虫的传播。表征利什曼原虫的地方性循环对了解其传播动力学至关重要。我们分析了塞拉多旱季走廊森林中哺乳动物和沙蝇中利什曼原虫的存在。2014年5月和9月对4个廊道林进行了调查。我们的捕获工作包括1280马力的陷阱夜，16个沙蝇香农陷阱夜和5120个哺乳动物陷阱夜。利用SSU rRNA和ITS-1聚合酶链式反应（PCR）技术对利什曼原虫进行鉴定，共捕获沙蝇13种1209只，以黄斑双蝇（bicromomia flaviscutellata）为主。雌沙蝇未检出利什曼原虫DNA。5月（旱季早期）对153只哺乳动物进行PCR分析，发现20份样本（13%）感染利什曼原虫，其中一个长廊林感染率为31%。寄主种为大鼠鼠、长尾鼠和白腹鼠。我们观察到哺乳动物感染利什曼原虫的频率较低，而在沙蝇中未发现利什曼原虫。结果表明，塞拉多走廊林哺乳动物的利什曼原虫感染率在旱季早期较高。

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来源期刊

Revista Brasileira De Parasitologia Veterinaria PARASITOLOGY-VETERINARY SCIENCES

CiteScore

2.60

自引率

7.70%

发文量

审稿时长

>12 weeks

期刊介绍： La revista es un órgano de difusión del Colegio Brasileño de Parasitología Veterinaria, con una especificidad dentro de esa área, la difusión de los resultados de la investigación brasileña en las áreas de Helmintología, Protozoología, Entomología y agentes transmitidos por artrópodos, relacionados con la salud animal.