Laboratório de Biologia Celular e Tecidual, Centro de Biociências e Biotecnologia, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ 28013-602, Brazil.
Laboratório de Zootecnia e Nutrição Animal, Centro de Ciências e Tecnologias Agropecuárias, Universidade Estadual do Norte Fluminense, Av. Alberto Lamego, 2000, Campos dos Goytacazes, RJ 28013-602, Brazil.
Vet Parasitol. 2014 Feb 24;200(1-2):147-52. doi: 10.1016/j.vetpar.2013.11.022. Epub 2013 Nov 28.
Libyostrongylus genus contains three species of gastrointestinal nematodes that infect ostriches. Of these, only Libyostrongylus douglassii has been implicated in diseases and lower productivity. A morphological diagnosis method allowing the discrimination of infective larvae of L. douglassii and Libyostrongylus dentatus and the evaluation of eggs per gram of feces (EPG) was used to determine the population dynamics of both species from two ostrich farms located in the northern region of the state of Rio de Janeiro, Brazil. The presence of these nematodes was monitored every 15 days for two years. The average EPG was 4631 and 587 on farms 1 and 2, respectively. Overall, the highest values of EPG were associated with the rainy season on both farms. However, only on farm 1 the rainy season correlated statistically with EPG. Both species of Libyostrongylus occurred on both farms with a higher predominance (86%) of L. douglassii on farm 1, whereas the distribution of infection on farm 2 was more heterogeneous with a slight predominance of L. douglassii. The infection and the prevalence of these species may vary considerably according to the farm facilities, management adopted, and season.
利什曼属包含三种感染鸵鸟的胃肠道线虫。其中，只有双腔利什曼虫与疾病和生产力下降有关。本研究采用一种形态学诊断方法来区分双腔利什曼虫和齿利什曼虫的感染性幼虫，并评估每克粪便中的虫卵数（EPG），以确定来自巴西里约热内卢州北部两个鸵鸟养殖场这两种线虫的种群动态。在两年内，每 15 天监测一次这些线虫的存在情况。两个养殖场的平均 EPG 值分别为 4631 和 587。总体而言，EPG 值最高与两个养殖场的雨季有关。然而，只有在养殖场 1，雨季与 EPG 值呈统计学相关。双腔利什曼虫和齿利什曼虫均在两个养殖场中出现，养殖场 1 中双腔利什曼虫的优势更为明显（86%），而养殖场 2 的感染分布更为复杂，双腔利什曼虫略占优势。这些物种的感染和流行情况可能因养殖场设施、采用的管理措施和季节而异。
