Monospecific helminth and arthropod infections in an urban population of brown rats from Doha, Qatar

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-12 DOI:10.1017/s0022149x00701489

M.A. Abu-Madi, J.W. Lewis, M. Mikhail, M.E. El-Nagger, J.M. Behnke

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Abstract

Parasitic infections were studied for the first time in an urban population of brown rats (Rattus norvegicus) from Doha. Only one species of helminth was found, the cestode Hymenolepis diminuta, and one ectoparasite, the flea Xenopsylla astia, from a sample size of 136 rats (52 males and 84 females). The prevalence of H. diminuta was 17.6%, increasing with host age but not in relation to host sex nor season of capture. Host age was a key factor in influencing abundance of infection, although there was a significant three-way interaction with season and host sex arising through heavy infections in juvenile male rats in the summer. The prevalence of X. astia was 45.6%, although both prevalence and abundance of infestations were season and host age dependent. In the winter prevalence and abundance were similar in both host age and sex groups, but in the summer both parameters of infestation were markedly higher among juveniles compared with adults. We found evidence for some association between these two species: H. diminuta was more prevalent among rats with fleas than among those without, although this association was season-, and independently sex- and age-dependent. There were no quantitative interactions and reasons for this are discussed in relation to the foraging and breeding behaviour of the brown rat in Qatar.

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卡塔尔多哈城市褐鼠群体中的单特异性蠕虫和节肢动物感染

我们首次对多哈的城市褐鼠（Rattus norvegicus）群体中的寄生虫感染情况进行了研究。在 136 只大鼠（52 只雄鼠和 84 只雌鼠）样本中，只发现了一种蠕虫--绦虫 Hymenolepis diminuta 和一种体外寄生虫--跳蚤 Xenopsylla astia。H.diminuta的感染率为17.6%，随着宿主年龄的增长而增加，但与宿主性别和捕获季节无关。宿主年龄是影响感染丰度的关键因素，但由于夏季幼年雄鼠感染率高，宿主年龄与季节和宿主性别之间存在显著的三方交互作用。X.astia的感染率为45.6%，但感染率和感染量都与季节和宿主年龄有关。在冬季，宿主年龄组和性别组的流行率和丰富度相似，但在夏季，幼鼠的感染率和丰富度均明显高于成年鼠。我们发现了这两个物种之间存在某种关联的证据：有跳蚤的大鼠比没有跳蚤的大鼠更容易感染 H. diminuta，尽管这种关联是季节性的，而且与性别和年龄无关。我们没有发现定量的相互作用，并结合卡塔尔褐鼠的觅食和繁殖行为讨论了其中的原因。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.