Temporal studies on Fasciola hepatica in Galba truncatula in the west of Ireland
Temporal studies on Fasciola hepatica in Galba truncatula in the west of Ireland
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DOI：
10.1016/j.vetpar.2010.10.010
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发表时间：
2011-02-10
影响因子：
2.6
通讯作者：
deWaal, T.
中科院分区：
文献类型：
--
作者：
Relf, V.;Good, B.;deWaal, T.
从2006年8月至2008年3月，在爱尔兰马约郡的Teagasc山绵羊场调查了Galba truncatula中肝片吸虫的种群动态和患病率。每隔两周在该农场4个钉螺栖息地采集974只蒺藜螺，记录其相对密度、月平均降雨量和月平均气温。蜗牛的数量与降雨量和温度有关。G.在2006/2007年冬季（2006年12月至2007年2月）、2007年春中期和夏季（4月至7月）以及2007/2008年秋末和冬季（2007年10月至2008年2月），蒺藜的丰度普遍较低。总的来说，G.在研究期间，蒺藜的丰度是明显的，早春（3月）和夏末/秋季（8月下旬至10月）的高峰。F. hepatica在G.截形草的流行率最高的时期是2007年夏季（25%）和秋季（16%）。有两个季节性传播高峰，表现为蜗牛中存在成熟感染，一个在夏季/秋季，另一个在冬末/早春。因此，在成熟和未成年蜗牛中分别观察到尾蚴（28%）和恢复期（29%）是主要的发育阶段，这并不令人意外。在这项研究中值得注意的是，在未成年的蜗牛中也有明显的尾蚴。本研究强调了温和的温度和潮湿的条件对蜗牛和吸虫发育的影响。如果温和和潮湿天气的趋势继续下去，G.在爱尔兰的放牧牲畜中，(C)2010爱思唯尔有限公司版权所有。
The population dynamics and prevalence of Fasciola hepatica in Galba truncatula were investigated on the Teagasc hill sheep farm in Country Mayo, Ireland from August 2006 until March 2008. Galba truncatula (n = 974) were collected at fortnightly intervals in 4 snail habitats on the farm, their relative density and mean monthly rainfall and temperature were recorded. Snail abundance was associated with rainfall and temperature. G. truncatula abundance was generally low during winter 2006/2007 (December 2006-February 2007), mid spring and summer 2007 (April-July) and late autumn and winter 2007/2008 (October 2007-February 2008). Overall, two peaks in G. truncatula abundance were evident during the study period, an early spring (March) and late summer/autumn (late August-October) peak. Seasonal differences were observed in the prevalence of F. hepatica in G. truncatula, the greatest prevalence was evident in 2007 during the summer (25%) and autumn (16%). Two seasonal transmission peaks, as evident by the presence of mature infections in snails, one in summer/autumn and the other in late winter/early spring. Not unsurprising, cercariae (28%) and rediae (29%) were the predominant developmental stages observed in mature and pre-adult snails respectively. Worthy of note in this study, cercariae were also evident in pre-adult snails. The present study highlights the influence of milder temperatures and wetter conditions on both snail and fluke development. If the trend in mild and wet weather conditions continues, there is the potential for an increase in the number of G. truncatula habitats and ultimately the prevalence of fasciolosis in grazing livestock in Ireland. (C) 2010 Elsevier B.V. All rights reserved.