克氏锥虫感染降低了恰加斯病病媒——棘足锥虫的种群适合度。

IF 1.6 3区 农林科学 Q2 ENTOMOLOGY
Sophie de Bona, Hsin Chi, Ramiro O. Bustamante, Carezza Botto-Mahan
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引用次数: 0

摘要

吸血昆虫Mepraia spinolai(半翅目:红蝇科:Triatominae)自然感染了原生动物克氏锥虫,这是人类Chagas病的病原体。在这项研究中,我们比较了有和没有克鲁兹锥虫感染的棘突线虫的人口统计学参数。我们收集了479个不成熟的生命表数据 对照队列的棘突线虫个体(在未感染克鲁兹锥虫的小鼠上饲养)和563 治疗队列的M.spinolai个体(在克鲁兹感染T.cruzi的小鼠上饲养)。睡莲被保存在生长室内的单独隔间中(26°C;65-75%),直到成年;每天记录换羽和存活情况。对于对照组的成人生活表研究,我们使用了来自对照队列的24对成年人。在克鲁兹锥虫感染队列的成人生活表研究中,25名感染的女性与25名对照队列的男性配对。使用bootstrap匹配技术,基于年龄阶段、两性生活表对生活表数据进行分析。对照组的预产期存活率(0.5282)显著高于感染组(0.2913) = 22.29个鸡蛋/♀) 人口净生育率(R0 = 5.07个后代/个体)与感染队列(Fr = 23.35个鸡蛋/♀, R0 = 3.77个后代/个体)。由于总产前期较短,生殖女性比例较高 = 0.0053 d-1)和有限增长率(λ = 1.0053d-1)显著高于克氏锥虫感染组(r = 0.0035 d-1,λ = 1.0035d-1)。这些结果表明,克鲁兹锥虫感染降低了恰加斯病媒介刺突线虫的种群适应度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Trypanosoma cruzi infection reduces the population fitness of Mepraia spinolai, a Chagas disease vector

Trypanosoma cruzi infection reduces the population fitness of Mepraia spinolai, a Chagas disease vector

Trypanosoma cruzi infection reduces the population fitness of Mepraia spinolai, a Chagas disease vector

The hematophagous insect Mepraia spinolai (Hemiptera: Reduviidae: Triatominae) is naturally infected with the protozoan parasite Trypanosoma cruzi, the agent of Chagas disease in humans. In this study, we compared the demographic parameters of M. spinolai with and without T. cruzi infection. We collected the immature life table data of 479 M. spinolai individuals of control cohort (reared on mice without T. cruzi infection) and 563 M. spinolai individuals of treatment cohort (reared on mice with T. cruzi infection). Nymphs were maintained in individual compartments inside a growth chamber (26°C; 65–75%) until adult emergence; moulting and survival were recorded daily. For the adult life table study of the control, we used 24 pairs of adults from the control cohort. For the adult life table study of T. cruzi-infected cohort, 25 infected females were paired with 25 males from the control cohort. Life table data were analysed using bootstrap-match technique based on the age-stage, two-sex life table. The preadult survival rate (0.5282) of the control cohort was significantly higher than that of the infected cohort (0.2913). However, the mean fecundity of reproductive females (Fr = 22.29 eggs/♀) and net reproductive rate of population (R0 = 5.07 offspring/individual) of the 0.5th percentile bootstrap-match control cohort were not significantly different from those of the infected cohort (Fr = 23.35 eggs/♀, R0 = 3.77 offspring/individual). Due to the shorter total preoviposition period and higher proportion of reproductive female, the intrinsic rate of increase (r = 0.0053 d−1) and finite rate of increase (λ = 1.0053 d−1) of control cohort of M. spinolai were significantly higher than those of the T. cruzi-infected cohort (r = 0.0035 d−1, λ = 1.0035 d−1). These results suggest that T. cruzi infection reduces the population fitness of the Chagas disease vector M. spinolai.

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来源期刊
Medical and Veterinary Entomology
Medical and Veterinary Entomology 农林科学-昆虫学
CiteScore
3.70
自引率
5.30%
发文量
65
审稿时长
12-24 weeks
期刊介绍: Medical and Veterinary Entomology is the leading periodical in its field. The Journal covers the biology and control of insects, ticks, mites and other arthropods of medical and veterinary importance. The main strengths of the Journal lie in the fields of: -epidemiology and transmission of vector-borne pathogens changes in vector distribution that have impact on the pathogen transmission- arthropod behaviour and ecology- novel, field evaluated, approaches to biological and chemical control methods- host arthropod interactions. Please note that we do not consider submissions in forensic entomology.
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