França-Silva João C, Barata Ricardo A, Costa Roberto T da, Monteiro Erika Michalsky, Machado-Coelho George L L, Vieira Edvá P, Prata Aluisio, Mayrink Wilson, Nascimento Evaldo, Fortes-Dias Consuelo L, da Silva Jaime C, Dias Edelberto S
Departamento de Parasitologia, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP 31270-901, Belo Horizonte, MG, Brazil.
Vet Parasitol. 2005 Aug 10;131(3-4):213-20. doi: 10.1016/j.vetpar.2005.05.006.
A study of Lutzomyia longipalpis (Lutz and Neiva, 1912) (Diptera: Psychodidae), the primary vector of American visceral leishmaniasis (AVL), and the canine form of the disease, was carried out in Porteirinha. The city is situated in the northern part of the Brazilian State of Minas Gerais and is an endemic area of AVL. Systematic phlebotomine captures were performed in seven districts with previously reported cases of canine visceral leishmaniasis, during 2 years (January 2000--December 2001). A total of 2328 specimens of L. longipalpis were captured. The association between the local climate variables and the population density of L. longipalpis was evaluated and rainfall was determined to be a major factor, with increased populations during the rainy season (October--March). At the same time period, blood samples from every dog domiciled in the same seven districts, in total 14,077 animals, were analyzed for infection by viscerotropic Leishmania using indirect immunofluorescence assay (IFA). Accumulated incidence rates of canine VL per district varied from 3.40 to 14.34 for the 2-year period. A positive correlation between the population density of L. longipalpis and the canine cases of visceral leishmaniasis in Porteirinha was observed.
对美洲内脏利什曼病（AVL）及其犬类形式的主要传播媒介长须罗蛉（Lutzomyia longipalpis）（Lutz和Neiva，1912年）（双翅目：毛蠓科）进行了一项研究。该研究在波特里尼亚进行。该市位于巴西米纳斯吉拉斯州北部，是AVL的流行地区。在2年期间（2000年1月至2001年12月），在先前报告有犬内脏利什曼病病例的7个区进行了系统的白蛉捕获。共捕获了2328只长须罗蛉标本。评估了当地气候变量与长须罗蛉种群密度之间的关联，确定降雨是一个主要因素，在雨季（10月至3月）种群数量增加。在同一时期，对居住在相同7个区的每只狗（总共14077只动物）的血液样本，使用间接免疫荧光法（IFA）分析内脏利什曼原虫感染情况。2年期间，每个区犬内脏利什曼病的累积发病率在3.40至14.34之间。观察到波特里尼亚长须罗蛉的种群密度与犬内脏利什曼病病例之间存在正相关。
