Lotta Ingrid A, Matta Nubia E, Torres Rubén D, Sandino Martha Moreno-de, Moncada Ligia I
Biology Department, Universidad Nacional de Colombia, Bogotá, Colombia.
J Parasitol. 2013 Apr;99(2):359-62. doi: 10.1645/GE-3156.1. Epub 2012 Oct 9.
Leucocytozoon spp. infections have been rarely studied in Neotropical countries. The apparently low prevalence of these parasites compared to the Nearctic regions suggests the absence of competent vectors; however, a 21.3% overall prevalence has recently been reported in non-migratory birds from the páramo region of Chingaza National Natural Park (NNP), where Turdus fuscater (Great Thrush) is the species most frequently infected by these parasites. The present study provides the descriptions of the Leucocytozoon spp. detected in Great Thrushes trapped in Chingaza NNP. The parasites were confirmed by microscopic examination and PCR of blood, histopathology was also done. Leucocytozoon dubreuili and L. fringillinarum gametocytes were observed in blood smears. The corresponding cytochrome b (cyt b) lineages obtained of L. fringillinarum were closely related to lineages previously found in individuals infecting turdiid species sampled elsewhere. This is one of the few reports analyzing Leucocytozoon spp. infections in resident birds from a Neotropical country.
在新热带地区国家，对住白细胞虫属（Leucocytozoon spp.）感染的研究很少。与新北地区相比，这些寄生虫的患病率明显较低，这表明缺乏有效的传播媒介；然而，最近有报道称，在钦加萨国家自然公园（NNP）的帕拉莫地区的非候鸟中，总体患病率为21.3%，其中乌鸫（Turdus fuscater，大画眉鸫）是最常感染这些寄生虫的物种。本研究描述了在钦加萨NNP捕获的大画眉鸫中检测到的住白细胞虫属物种。通过血液显微镜检查和PCR确认了寄生虫，并进行了组织病理学检查。在血涂片中观察到了杜氏住白细胞虫（Leucocytozoon dubreuili）和燕雀住白细胞虫（L. fringillinarum）的配子体。从燕雀住白细胞虫获得的相应细胞色素b（cyt b）谱系与先前在其他地方感染鸫科物种的个体中发现的谱系密切相关。这是分析新热带地区国家留鸟中住白细胞虫属感染的少数报告之一。
