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首页> 外文期刊>Journal of Parasitology >IS GNATHOSTOMA TURGIDUM AN ANNUAL PARASITE OF OPOSSUMS? DRASTIC SEASONAL CHANGES OF INFECTION IN DIDELPHIS VIRGINIANA IN MEXICO
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IS GNATHOSTOMA TURGIDUM AN ANNUAL PARASITE OF OPOSSUMS? DRASTIC SEASONAL CHANGES OF INFECTION IN DIDELPHIS VIRGINIANA IN MEXICO

机译：GNATHOSTOMA TURGIDUM是每年一次的寄生虫寄生虫吗？墨西哥狄氏疟原虫感染的季节性季节性变化

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摘要

Gnathostoma turgidum is a nematode that parasitizes the stomach of opossums, Didelphis virginiana. Despite its wide distribution in the Americas, its natural life cycle is poorly understood. Recently, we found an endemic area for G. turgidum infection in Sinaloa, Mexico (Díaz-Camacho et al., 2009). Based on sporadic surveys for several years, the prevalence was apparently high in summer and extremely low in winter. To confirm that this is really a seasonal variance, we conducted a longitudinal survey on G. turgidum infection in opossums from November 2007 to November 2008. The results showed amazing seasonal changes in the prevalence, with synchronized migration and maturation of worms in opossums. Between February and March, many juvenile worms, with occasional AL3, were found in the liver, but no worms were found in the stomach. Mature adult worms began to appear in the stomach around April and rapidly increased in number toward July, when all worms resided in the stomach. Then, the worms disappeared almost completely by November. These results suggest that G. turgidum is an annual parasite of the opossum, D. virginiana, in Mexico.
机译：Turgidum Gnathostoma是一种线虫，寄生于负鼠Didelphis virginiana的胃中。尽管它在美洲分布广泛，但人们对其自然生命周期知之甚少。最近，我们在墨西哥的锡那罗亚州发现了一种杜氏根瘤菌感染的流行地区（Díaz-Camacho等，2009）。根据几年的零星调查，夏季的患病率显然很高，而冬季则很低。为了确认这确实是季节性变化，我们对2007年11月至2008年11月的负鼠孢霉菌感染进行了纵向调查。结果表明，负鼠蠕虫的流行率具有惊人的季节性变化，同时蠕虫在负鼠中同步迁移和成熟。在2月和3月之间，在肝脏中发现了许多幼虫，偶有AL3，但在胃中未发现任何蠕​​虫。成熟的成年蠕虫在四月左右开始出现在胃中，并在七月全部蠕虫都驻留在胃中后迅速增加。然后，到11月，蠕虫几乎完全消失了。这些结果表明，杜氏根瘤菌是墨西哥负鼠D. virginiana的年度寄生虫。

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