On the interpretation of host‐parasite ecology: Heligmosomoides polygyrus (Nematoda) in wild wood mouse (Apodemus sylvaticus) populations
On the interpretation of host‐parasite ecology: Heligmosomoides polygyrus (Nematoda) in wild wood mouse (Apodemus sylvaticus) populations
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宿主寄生虫生态学的解释：野生林鼠（Apodemus sylvaticus）种群中的Heligmosomoides polygyrus（线虫）
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
R. Gregory
中科院分区：
文献类型：
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作者：
R. Gregory
本文描述了林鼠、黑线姬鼠和多回黑线姬鼠相互作用的流行病学和季节性规律。分析中使用的数据是由C.S.埃尔顿和他在牛津郡巴格利伍德的同事在20世纪20年代末收集的。多回螺旋线虫是迄今为止最常见的寄生虫，感染了70%的木鼠，平均感染强度约为每只小鼠12条。雄鼠和雌鼠的寄生虫负担相似。每个寄主的寄生虫数量高度过度分散，符合负二项分布。无论是在性别内部还是在性别之间，年龄(=体重)-强度曲线中几乎没有凸性的证据。
宿主和寄生虫的数量显示出可预测的季节性模式，老鼠数量在繁殖季节结束时达到最大，8月和9月，寄生虫数量在春季末5月左右达到最大。文中还讨论了多脑回在木头和实验小鼠中的生态学，并与人类蠕虫感染作了初步比较。对这些数据中的流行病学模式的解释是有问题的。特别重要的是寄生虫在宿主种群中的统计分布，以及不同性别之间与生长、存活和诱捕有关的可能差异。这些困难与一系列类似的现场数据有关。
This paper describes epidemiological and seasonal patterns in the interaction between wood mice, Apodemus sylvaticus and Heligmosomoides polygyrus. Data used in the analysis were collected by C. S. Elton and co-workers at Bagley Wood, Oxfordshire in the late 1920s. Heligmosomoides polygyrus was by far the most common helminth parasite with 70% of all wood mice infected and average intensity around 12 worms per mouse. Male and female mice were shown to harbour similar parasite burdens. Parasite numbers per host were highly overdispersed and were well described by the negative binomial distribution. There was little evidence for convexity in age (= weight)-intensity curves, either within or across sexes.
Host and parasite numbers showed predictable seasonal patterns, with mouse populations at their largest at the end of the breeding season, in August and September, and parasite populations at their largest in the late spring, around May. Results are discussed in relation to the ecology of H. polygyrus in wood and laboratory mice, and tentative comparison is made with human helminth infection. The interpretation of epidemiological patterns in these data was problematic. Of particular importance was the statistical distribution of parasites within the host population, and possible differences between mouse sexes in relation to growth, survival and trapping. Such difficulties are relevant to a range of similar field data.