Bassini-Silva Ricardo, de Castro Jacinavicius Fernando, Muñoz-Leal Sebastián, Maturano Ralph, Takatsu Julia Carvalho, Tolesano-Pascoli Graziela Virginia, Alquezar Renata D, Lugarini Camile, Ferreira Ariane, Moreira-Lima Luciano, Welbourn Cal, Ochoa Ronald, Hingst-Zaher Erika, André Marcos Rogério, Labruna Marcelo Bahia, Barros-Battesti Darci Moraes
Laboratório de Coleções Zoológicas, Instituto Butantan, São Paulo, SP, Brazil.
Departamento de Patologia, Faculdade de Ciências Agrárias e Veterinárias-UNESP, Reprodução e Saúde Única, Jaboticabal, SP, Brazil.
Arch Microbiol. 2023 Jan 4;205(1):51. doi: 10.1007/s00203-022-03393-9.
Chiggers are larval ectoparasites of the Trombiculidae that can transmit pathogens to their hosts. In this study, chiggers collected from birds in Brazil were morphologically identified as Blankaartia sinnamaryi, Eutrombicula batatas, Eutrombicula daemoni, Eutrombicula goeldii, Eutrombicula tinami, and Parasecia gilbertoi. For these specimens, a beginning attempt at molecular identification were also provided, as well as, were genetically screened to detect bacterial pathogens. The species B. sinnamaryi and E. tinami were positive for Rickettsia felis-like and 'Candidatus Rickettsia colombianensi'-like, respectively. For the other agents (Anaplasmataceae, Borrelia spp. and Orientia tsutsugamushi), the tests were negative. This is the first report of 'Ca. R. colombianensi'-like and the second record of R. felis-like in chigger collected on birds from Brazil.
恙螨是恙螨科的幼虫期体外寄生虫，可将病原体传播给宿主。在本研究中，从巴西鸟类身上采集的恙螨经形态学鉴定为辛纳马里布兰卡恙螨、甘薯真恙螨、恶魔真恙螨、戈氏真恙螨、田鼠真恙螨和吉尔贝托副恙螨。对于这些标本，还进行了初步的分子鉴定尝试，并进行了基因筛查以检测细菌病原体。辛纳马里布兰卡恙螨和田鼠真恙螨分别对猫立克次氏体样和“哥伦比亚立克次氏体候选种”样呈阳性。对于其他病原体（无形体科、疏螺旋体属和恙虫病东方体），检测结果为阴性。这是在巴西鸟类身上采集的恙螨中首次报道“哥伦比亚立克次氏体候选种”样，也是猫立克次氏体样的第二次记录。
