Lilioso Maurício, Pires-Silva Dayane, von Hertwig Mascarenhas Fontes Fernanda, Oliveira Jader, da Rosa João Aristeu, Vilela Roberto V, Folly-Ramos Elaine, Almeida Carlos Eduardo
Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Brazil.
Instituto de Biologia, Universidade Estadual de Campinas - UNICAMP, Brazil.
Infect Genet Evol. 2020 Aug;82:104307. doi: 10.1016/j.meegid.2020.104307. Epub 2020 Mar 30.
In semi-arid areas of northeastern Brazil, Chagas disease vectors of Triatoma brasiliensis species complex comprise a monophyletic group of kissing bugs that inhabit rock outcrops. Most of them exhibit allopatric or parapatric distribution; the exception is T. petrocchiae, which is found in cohabitation with T. brasiliensis in rock outcrops. We used vertebrate mitochondrial gene sequencing applied to DNA isolated from bug midgut to identify the insect blood meal sources via BLAST procedure. Fourteen sylvatic insects from four geographic districts in the states of Rio Grande do Norte and Paraíba had their blood meal sources detected. While T. brasiliensis is recorded to be associated mainly (52-71%) with rodents, T. petrocchiae samples were strongly associated (86%) with reptiles of Tropidurus and Hemidactylus genera. We suggest that T. petrocchiae is the single member within this complex to be associated with reptiles, indicating a distinct niche occupation related to the trophic resources.
在巴西东北部的半干旱地区，巴西锥蝽属物种复合体的恰加斯病病媒包括栖息在岩石露头处的单系亲族猎蝽。它们大多呈现异域或邻域分布；例外的是彼得罗锥蝽，它与巴西锥蝽在岩石露头处共同存在。我们利用脊椎动物线粒体基因测序技术，对从猎蝽中肠分离出的DNA进行测序，通过BLAST程序来识别昆虫的血餐来源。从北里奥格兰德州和帕拉伊巴州四个地理区域采集的14只野生昆虫的血餐来源被检测出来。虽然记录显示巴西锥蝽主要（52%-71%）与啮齿动物有关，但彼得罗锥蝽样本与瘤尾守宫属和半叶趾虎属的爬行动物密切相关（86%）。我们认为彼得罗锥蝽是该复合体中唯一与爬行动物有关的成员，这表明其在营养资源方面占据了独特的生态位。
