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Development of a visual rapid detection method for aquatic animal-derived Trypanosoma via MIRA-LFD 水生动物源性锥虫MIRA-LFD视觉快速检测方法的建立。
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-28 DOI: 10.1016/j.vetpar.2025.110636
Xue-Mei Yuan , Xin-Zhi Weng , Xia-Lian Bu , Jing Chen , Jing-Biao Jiao , Xian-Qi Peng , Wei-Song Ma , Ling-Yun Lin , Lei Huang , Xiao-Yi Pan , Hong-Xia Hu , Ling-Wei Xu , Jia-Yun Yao
Trypanosoma is a genus of flagellated protozoan parasites that commonly infect the blood of various vertebrates, including aquatic animals. Under natural conditions, these pathogens are vectored by leeches and may induce clinical manifestations such as anemia, edema, and appetite suppression in hosts. Prolonged infection can lead to severe weight loss, ultimately contributing to economic losses in aquaculture. In this study, we developed a rapid diagnostic assay combining Multienzyme isothermal rapid amplification (MIRA) with Lateral flow dipstick (LFD) visualization for detecting aquatic animal-derived Trypanosoma. Using Small Subunit Ribosomal DNA (SSU rDNA) gene as the detection target, specific primers and probes were designed. The optimal primer and probe combination were selected via primer screening. Through the optimization of reaction conditions and specificity and sensitivity testing, a method for detecting trypanosomes in aquatic animals was established using MIRA-LFD. The optimal reaction temperature for MIRA is 45℃. The reaction time is 15 min, and the result observation time is 5 min, resulting in a total duration of the entire detection process of 20 min. The specificity test results indicated that the method can specifically detect trypanosome DNA, with no cross-reactions observed with eight common parasites of aquatic animals (e.g., Argulus sp., Cryptocaryon irritans) or five host species (e.g., large yellow croaker, koi carp). The sensitivity test results demonstrated a detection limit of 8 pg/µL for trypanosome DNA (1000-fold higher than conventional PCR) and could detect as few as 1 trypanosome, compared to 100 trypanosomes required for conventional PCR. This method successfully detected trypanosome DNA from various tissue samples of large yellow croaker (Larimichthys crocea), including gill mucus, blood, and kidney tissue. In contrast, the PCR method only detected trypanosome DNA in blood samples. Clinical validation with 24 samples revealed 100 % detection rate for positive samples by MIRA-LFD, outperforming PCR’s 83.33 % (10/12) rate. The MIRA-LFD method developed in this study for detecting aquatic animal-derived trypanosomes is rapid, simple, highly sensitive, and specific. It requires no sophisticated or expensive equipment, making it ideal for basic laboratories and on-site testing.
锥虫是一种有鞭毛的原生寄生虫属,通常感染各种脊椎动物的血液,包括水生动物。在自然条件下,这些病原体以水蛭为媒介,可引起宿主贫血、水肿、食欲抑制等临床表现。长期感染可导致体重严重下降,最终造成水产养殖业的经济损失。在这项研究中,我们开发了一种结合多酶等温快速扩增(MIRA)和侧流试纸(LFD)可视化的快速诊断方法,用于检测水生动物源性锥虫。以小亚单位核糖体DNA (SSU rDNA)基因为检测靶点,设计了特异性引物和探针。通过引物筛选筛选出最佳引物和探针组合。通过优化反应条件及特异性和敏感性试验,建立了MIRA-LFD检测水生动物体内锥虫的方法。MIRA的最佳反应温度为45℃。反应时间为15 min,结果观察时间为5 min,整个检测过程总耗时为20 min。特异性试验结果表明,该方法能特异性检测出锥虫DNA,与8种常见水生动物寄生虫(如Argulus sp.、Cryptocaryon irritans)和5种宿主动物(如大黄鱼、鲤鱼)均无交叉反应。灵敏度试验结果表明,对锥虫DNA的检测限为8 pg/µL(比传统PCR高1000倍),可以检测到1个锥虫,而传统PCR需要100个锥虫。该方法成功地检测了大黄鱼(Larimichthys crocea)各种组织样本的锥虫DNA,包括鳃粘液、血液和肾组织。相比之下,PCR方法仅检测血液样本中的锥虫DNA。24份样本的临床验证显示,MIRA-LFD对阳性样本的检出率为100 %,优于PCR的83.33 %(10/12)。本研究建立的检测水生动物源性锥虫的MIRA-LFD方法快速、简便、灵敏度高、特异性强。它不需要复杂或昂贵的设备,使其成为基础实验室和现场测试的理想选择。
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引用次数: 0
First report of marine leech Limnotrachelobdella okae infestation in miiuy croaker (Miichthys miiuy): An emerging threat to Chinese mariculture 海洋水蛭侵染黄花鱼(Miichthys miiuy)首次报道:对中国海水养殖的新威胁。
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-28 DOI: 10.1016/j.vetpar.2025.110637
Shunli Che , Zequan Mo , Hai Zhang , Haoran Tang , Xueming Dan , Yanwei Li
From January to April 2025, an unprecedented epizootic outbreak of Limnotrachelobdella okae infested Miichthys miiuy in China, reducing survival rates to 7.69 % and causing massive economic losses. Clinical manifestations included ulcerative lesions, gill filament pallor, and anorexia. The present study aimed to characterize this emerging parasitic threat and the involved pathogenic mechanisms. Leeches collected from infected fish were morphologically and phylogenetically identified. Although first documented to induce mortality in M. miiuy, L. okae exhibited broad host plasticity. Pathological impacts were assessed via hematological profiling and histopathology. The pathological effects of the infestation included a cascade of hemorrhagic anemia (40 % decrease in red blood cells and 39 % decrease in hemoglobin), systemic immunosuppression (69 % decrease in white blood cells), and anemia-induced multiple organ dysfunction (liver, spleen, head kidney, and trunk kidney). Furthermore, field data confirmed temperature (>20 °C) as the dominant driver of epidemic termination (Pearson’s r = -0.717, p = 0.045). Environmental tolerance assays of L. okae demonstrated strict cryohalophilic dependence, with optimal viability at 5–15°C and 15–25 ‰ salinity, and complete mortality was observed at 25 °C. The present study identified L. okae as an emerging threat to mariculture diversification. The present findings expand the spectrum of high-risk parasites jeopardizing marine aquaculture. Elucidation of the behavioral ecology and pathogenesis of L. okae will advance targeted surveillance and mitigation strategies.
2025年1月至4月,中国爆发了一场史无前例的大鼠疫病,使米氏鱼的存活率降至7.69 %,造成了巨大的经济损失。临床表现为溃疡性病变、鳃丝苍白、厌食。本研究旨在描述这种新出现的寄生虫威胁及其致病机制。从受感染的鱼中收集的水蛭进行了形态和系统发育鉴定。虽然第一次有文献记载它能引起M. miiuy的死亡,但L. okae表现出广泛的宿主可塑性。病理影响通过血液学分析和组织病理学进行评估。感染的病理影响包括一连串出血性贫血(红细胞减少40% %,血红蛋白减少39% %)、全身免疫抑制(白细胞减少69% %)和贫血引起的多器官功能障碍(肝、脾、头肾和干肾)。此外,现场数据证实温度(bbb20°C)是疫情终止的主要驱动因素(Pearson’s r = -0.717,p = 0.045)。环境耐受性试验表明,乳酸菌对低温嗜盐具有严格的依赖性,在5-15°C和15-25 ‰盐度条件下具有最佳的生存能力,在25°C条件下完全死亡。本研究确定了欧卡菌对海水养殖多样化的新威胁。目前的发现扩大了危害海洋水产养殖的高危寄生虫的范围。阐明okae的行为生态学和发病机制将促进有针对性的监测和缓解策略。
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引用次数: 0
Effects of Citrus aurantium extracts and limonene on Dipylidium caninum tegument: In vitro and in vivo study 柑桔提取物和柠檬烯对犬双星被毛的影响:体外和体内研究
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-27 DOI: 10.1016/j.vetpar.2025.110635
Aliaa A. Abd-Elaziz , Eman M. Abouelhassan , Elham A. Elkhawass , Obeid Shanab , Waleed F. Khalil , Abdelfattah M. Abdelfattah
Dipylidiosis is a common zoonotic infection of dogs caused by Dipylidium caninum. Infected dogs were treated using ethanolic extracts of the peel and seed of Citrus aurantium, as well as its main active compound (limonene). In vitro, peel and seed extracts (12.5, 25, 50 mg/ml) as well as limonene (30, 60, 120 µl/ml) induced worm immobility. Complete mortality of worms (100 %) was achieved 100 % mortality after 4 h for peel extracts and limonene and 6 h for seed extracts. Histological analysis and scanning electron microscopy showed significant structural damage in treated worms, including peeling, vesiculation, ulceration, fissures, and tegumental distortion. In vivo, dogs treated with peel extract at 150 and 300 mg/kg achieved high efficacy rates of 72.33 % and 92 %, respectively, and reached 100 % efficacy, comparable to that of praziquantel, by the end of the experiment. The extract's effectiveness was dose- and time-dependent. In conclusion, these findings suggest that C. aurantium peel extract provides a safe, sustainable, and effective natural alternative to synthetic drugs for treating D. caninum infections in dogs.
双螺旋病是犬双螺旋虫引起的一种常见的犬人畜共患传染病。受感染的狗使用柑橘皮和种子的乙醇提取物及其主要活性化合物(柠檬烯)进行治疗。在体外,果皮和种子提取物(12.5、25、50 mg/ml)以及柠檬烯(30、60、120 µl/ml)诱导蠕虫不动。果皮提取物和柠檬烯处理4 h,种子提取物处理6 h后,虫的完全死亡率达到100 %(100% %)。组织学分析和扫描电镜显示,处理过的蠕虫有明显的结构损伤,包括脱皮、水泡、溃疡、裂缝和被盖变形。在体内,150和300 mg/kg的果皮提取物对狗的有效率分别为72.33 %和92 %,实验结束时达到100% %,与吡喹酮相当。提取物的有效性与剂量和时间有关。综上所述,金葡萄皮提取物是一种安全、可持续、有效的天然药物,可替代合成药物治疗犬D. caninum感染。
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引用次数: 0
Bovine macrophages transcriptome profiling reveals divergent responses to virulent and attenuated Babesia bovis strains 牛巨噬细胞转录组分析揭示了对强毒和减毒巴贝斯虫牛菌株的不同反应
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-25 DOI: 10.1016/j.vetpar.2025.110634
Magalí Nicole Valenzano , Liliana Alvarez , Beatriz Valentini , Silvina Wilkowsky
Babesia bovis is a tick-borne parasite of major economic impact in the livestock industry. Control strategies rely mainly on the use of acaricides and live attenuated vaccines. Comparative genomic analyses have shown no major differences between virulent and attenuated B. bovis strains, suggesting that studies on the host’s differential response may represent a key step toward clarifying the basis of disease severity and vaccine efficacy. In this study, we analyzed by RNA-seq the differential gene expression in bovine monocyte-derived macrophages after phagocytosis of erythrocytes infected with either the virulent B. bovis S2P strain or the attenuated R1A one. The results revealed a common transcriptional core response of several cellular processes largely centered on lymphocyte related functions, cytokine regulation, and adaptive immune signaling. In turn, the two strains elicited contrasting responses in bovine macrophages, where the virulent strain induced the enrichment of lymphocyte- and antiviral-related pathways, and the attenuated strain led to a stronger pro-inflammatory, chemotactic, and extracellular matrix remodeling signatures. Taken together, these data improved our understanding of the early transcriptional events that develop in macrophages in response to the phagocytosis of red blood cells containing contrasting B. bovis strains. This large dataset could be evaluated in further studies to better characterize the pathogenic mechanisms of bovine babesiosis and to identify targets for host-directed therapeutic strategies.
牛巴贝斯虫是一种蜱传寄生虫,对畜牧业产生重大经济影响。控制策略主要依赖于使用杀螨剂和减毒活疫苗。比较基因组分析显示,强毒株和弱毒株之间没有重大差异,这表明对宿主差异反应的研究可能是澄清疾病严重程度和疫苗效力基础的关键一步。在这项研究中,我们通过RNA-seq分析了牛单核细胞来源的巨噬细胞在感染牛B. S2P毒株和R1A毒株后吞噬红细胞后的差异基因表达。结果揭示了几个细胞过程的共同转录核心反应,主要集中在淋巴细胞相关功能、细胞因子调节和适应性免疫信号。反过来,这两种菌株在牛巨噬细胞中引起了截然不同的反应,其中强毒株诱导淋巴细胞和抗病毒相关途径的富集,而弱毒株导致更强的促炎、趋化和细胞外基质重塑特征。综上所述,这些数据提高了我们对巨噬细胞中发生的早期转录事件的理解,这些转录事件是对含有对比牛双歧杆菌菌株的红细胞吞噬的反应。这个庞大的数据集可以在进一步的研究中进行评估,以更好地表征牛巴贝斯虫病的致病机制,并确定以宿主为导向的治疗策略的靶点。
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引用次数: 0
Green synthesis and larvicidal activity of ZnO nanoparticles against Lucilia sericata larvae using essential oil bio-reductants 氧化锌纳米颗粒精油生物还原剂对丝光绿蝇幼虫的绿色合成及杀幼虫活性研究
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-20 DOI: 10.1016/j.vetpar.2025.110633
Hatice Tosyagülü Çeli̇k , Nilüfer Vural , Sibel Kaymak
Lucilia sericata, a dipteran fly, causes myiasis by infesting living or necrotic tissues and transmits mycobacterial infections to livestock. Its potential resistance to common insecticides underscores the need for integrated pest management strategies and highlights the importance of biopesticides. In this context, larvicidal effects of Citrus sinensis, Cymbopogon flexuosus, Achillea millefolium, Origanum onites, Salvia fruticosa, and Mentha piperita essential oils and biocapsulated ZnO nanoparticles were investigated to control Lucilia sericata vectors. Synthesized ZnO nanoparticles were characterized using UV-Vis spectrophotometry, SEM and EDX techniques. By analytical characterization, sizes of nanoparticles loaded with Cymbopogon flexuosus and Citrus sinensis essential oils were 112 and 230, respectively, and SEM analysis confirmed monoclinic and hexagonal crystallites. The larvicidal effects of oils and nanoparticles were determined at various concentrations (0.5, 1, 5, 10 and 20 µg/ml) and all oils except Origanum onites showed high larvicidal effects and a linear increase in % mortality was observed with increasing concentration. To understand molecular mechanisms of larvicidal effect of oils on Lucilia sericata larvae, in silico analyses revealed that the highest antagonistic activity against the cytochrome P450 6A1-like protein of the species homology modeled was mediated by carvone and vertonal compounds, and predictions of ADMET properties revealed the properties of volatile bioactive components as a low toxicity alternative to temefos, a currently used larvicide. This research demonstrates the usability of the six essential oils and biosynthesized nanoparticles as highly effective, natural fly vectors and control pesticides.
丝光Lucilia sericata是一种双翅目蝇,通过寄生于活的或坏死的组织而引起蝇蛆病,并将分枝杆菌感染传播给牲畜。它对常见杀虫剂的潜在抗性强调了综合虫害管理战略的必要性,并突出了生物农药的重要性。在此背景下,研究了柑桔、金针菇、千叶阿基那、牛头草、鼠尾草和薄荷精油和生物胶囊氧化锌纳米颗粒对丝光Lucilia的杀虫效果。采用紫外可见分光光度法、扫描电镜和EDX技术对合成的ZnO纳米颗粒进行了表征。通过分析表征,载香茅精油和柑桔精油的纳米颗粒尺寸分别为112和230,SEM分析证实其为单斜晶和六方晶。在不同浓度(0.5、1、5、10和20 µg/ml)下测定了精油和纳米颗粒的杀幼虫效果,除土牛外,所有精油均表现出较高的杀幼虫效果,死亡率随浓度的增加呈线性增加。为了了解精油对丝光Lucilia sericata幼虫的杀幼虫作用的分子机制,通过硅分析发现,对物种同源模型中细胞色素P450 6a1样蛋白的最高拮抗活性是由香豆酮和垂直化合物介导的,并且对ADMET特性的预测显示了挥发性生物活性成分的特性,可以作为目前使用的杀幼虫剂temefos的低毒性替代品。该研究证明了六种精油和生物合成纳米颗粒作为高效的天然苍蝇载体和控制杀虫剂的可用性。
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引用次数: 0
Comparative analysis of the viability of Fasciola hepatica eggs collected from fecal and gallbladder samples in experimentally infected sheep 实验感染绵羊粪便和胆囊标本肝片吸虫卵活力的比较分析。
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-17 DOI: 10.1016/j.vetpar.2025.110631
S. Ortega-Vargas , I. Cruz-Mendoza , J.A. Figueroa-Castillo , A.V. Balderas-Loaeza , A. Villa-Mancera , F. Utrera-Quintana , H. Quiroz-Romero
The objective of this study was to determine and compare the viability of Fasciola hepatica eggs collected from fecal and gallbladder samples through the egg hatching test of experimentally infected sheep. The biological samples used come from a previously reported sheep vaccination trial. Twenty-five sheep free of fasciolosis and housed in pens with cement floors were used. The sheep were grouped into five groups (G1–5, n = 5 sheep per group). Groups G1(100 ug), G2 (200 ug), G3 (400 ug) were immunized with the chimeric protein (rFhLAP-CL1) and, groups G4 and G5 were the adjuvant and infection controls, respectively. All sheep were orally infected with 200 metacercariae. The experimental period was 24 weeks. Fasciola hepatica eggs were collected every 15 days from fecal samples from weeks 14–24 of the experiment, and from the gallbladder after euthanized. The viability of F. hepatica eggs was determined through an egg hatching assay (EHA). Eggs that had developed miracidium and hatched were considered viable eggs. The viability range of F. hepatica eggs from gallbladder was 22–59.6 % and of fecal samples was 67–88 %. The viability of F. hepatica eggs from fecal samples was higher (>90 %) than that of eggs from the gallbladder (<60 %). In the vaccination trial, the viability of F. hepatica eggs in the G3 group was significantly different compared to the control group, in fecal samples (p < 0.001) and in the gallbladder (p < 0.05). Higher viability of F. hepatica eggs was observed in fecal samples than in gallbladder samples. Fecal samples are suggested for determining the viability of trematode eggs in vaccination trials or evaluation of fasciolicides.
本研究的目的是通过实验感染绵羊的卵孵化试验,确定和比较从粪便和胆囊样本中收集的肝片吸虫卵的存活率。使用的生物样本来自先前报道的绵羊疫苗接种试验。试验使用了25只未患片吸虫病的羊,饲养在有水泥地板的围栏中。将羊分为5组(G1-5, n = 每组5只羊)。G1组(100 ug)、G2组(200 ug)、G3组(400 ug)分别用嵌合蛋白(rFhLAP-CL1)免疫,G4组和G5组分别作为佐剂和感染对照。所有羊均经口感染200个囊蚴。试验期24周。每15天从实验第14-24周的粪便样本和安乐死后的胆囊样本中收集肝片吸虫卵。通过卵孵化试验(EHA)测定肝单胞菌卵的存活率。已经发育出微型微生物并孵化出来的卵被认为是可存活的卵。胆囊肝绦虫卵的存活率为22 ~ 59.6% %,粪便肝绦虫卵的存活率为67 ~ 88 %。粪卵的存活率(bbb90 %)高于胆囊卵(
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引用次数: 0
Chi-miR-146a promotes the propagation of Neospora caninum by targeting the TGF-β1/SMAD2 pathway Chi-miR-146a通过靶向TGF-β1/SMAD2通路促进犬新孢子虫的繁殖
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-16 DOI: 10.1016/j.vetpar.2025.110632
Jin-Ming Chen, Jing-Yu Li, Jia-Yi Jin, Xiao-Qi Bao, De-Liang Tao, Xiao-Yun Zhao, Jun-Ke Song, Xin Yang, Ying-Ying Fan, Guang-Hui Zhao
Neospora caninum is known to induce abortions in various domestic animals (especially cattle and sheep), leading to substantial economic losses in the livestock industry. However, effective strategies for controlling N. caninum infection remains elusive. The precise mechanisms underlying the interaction between N. caninum and its host are not fully elucidated. Our previous study showed an upregulated microRNA (miRNA), Chi-miR-146a, promoted the propagation of N. caninum tachyzoites in caprine endometrial epithelial cells (EECs). The present study investigated its regulatory function during in vitro infection of N. caninum. The expression of Chi-miR-146a was upregulated from 12 h post infection (hpi) to 48 hpi. One of target genes for Chi-miR-146a, tgfb1, was identified and the mRNA and protein levels were downregulated at 24 hpi and 48 hpi. Overexpression of tgfb1 suppressed the propagation of N. caninum tachyzoites in caprine EECs. Further analysis indicated that Chi-miR-146a enhanced in vitro propagation of N. caninum propagation through suppressing the activation of the TGF-β1/SMAD2 signaling pathway. The findings in this study offer a novel theoretical framework for advancing our understanding on mechanisms of intracellular survival of N. caninum and devising preventive strategies against this pathogen.
众所周知,犬新孢子虫会导致各种家畜(特别是牛和羊)流产,给畜牧业造成巨大的经济损失。然而,控制犬奈瑟菌感染的有效策略仍然难以捉摸。犬乳杆菌与其宿主相互作用的确切机制尚未完全阐明。我们之前的研究表明,上调的microRNA (miRNA) Chi-miR-146a促进了山羊子宫内膜上皮细胞(EECs)中N. caninum速殖子的繁殖。本研究探讨了其对犬奈瑟菌体外感染的调控作用。Chi-miR-146a的表达从感染后12 h (hpi)上调至48 hpi。鉴定出Chi-miR-146a的靶基因之一tgfb1,并在24 hpi和48 hpi时下调mRNA和蛋白水平。tgfb1的过表达抑制了犬链球菌速殖子在绵羊EECs中的繁殖。进一步分析表明,Chi-miR-146a通过抑制TGF-β1/SMAD2信号通路的激活,增强了N. caninum的体外繁殖。本研究结果为进一步了解犬链球菌胞内存活机制和制定预防策略提供了新的理论框架。
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引用次数: 0
Anthelmintic efficacy and sublethal effects of trichlorfon in pirarucu (Arapaima gigas) naturally infected with Dawestrema cycloancistrium 敌百虫对自然感染环ancistrium Dawestrema的大腹鱼的驱虫效果和亚致死效应。
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-14 DOI: 10.1016/j.vetpar.2025.110630
Jeffesson de Oliveira-Lima , Patricia Oliveira Maciel-Honda , Jayne Barros de Aguiar Silva , Liana Bezerra Dias de Lima , Sandro Estevan Moron
Trichlorfon is an organophosphate commonly used to control fish ectoparasites due to its cholinesterase-inhibiting action. Due to recurring issues with monogeneans in pirarucu, this active ingredient has been frequently used in this aquaculture system. The present study aimed to simultaneously evaluate the antiparasitic efficacy and physiological effects of trichlorfon in A. gigas juvenile naturally infected with monogenean Dawestrema cycloancistrium. In the in vitro assay, parasitized gill arches were exposed to trichlorfon (0.1 mg/L - 10 g/L) under controlled conditions, with parasite motility analyzed every 30 min. A 100 % mortality rate was observed after 30 min at 10 g/L and after 3 h at 10 mg/L; concentrations ≤ 1 mg/L caused only a reduction in parasite motility. In the in vivo trial, 96 juveniles were separated into four groups: control, 10 g/L for 30 min, 10 mg/L for 3 h and 10 mg/L for 96 h. The 10 mg/L for 96 h treatment showed the highest efficacy (96.9 %), significantly surpassing the others (49.7 % and 42.3 %; p < 0.05). However, this prolonged exposure induced hypochromic anemia, leukopenia, reduction in ALT and AST levels, and hyperglycemia. It is concluded that trichlorfon short-bath protocols, such as 10 g/L for 30 min or 10 mg/L for 3 h did not cause significant physiological alterations but resulted in only partial efficacy (∼50 %). Prolonged exposures at 10 mg/L for 96 h should not be recommended for A. gigas due to their hematotoxic and hepatotoxic effects.
敌百虫是一种有机磷酸盐,由于其抑制胆碱酯酶的作用,通常用于防治鱼类外寄生虫。由于在皮拉鲁库中反复出现的单系问题,这种活性成分已被频繁地用于该水产养殖系统。本研究旨在同时评价敌百虫对自然感染单系环ancistrium Dawestrema的gigas幼鱼的抗寄生效果和生理效应。在体外实验中,被寄生的鳃弓在受控条件下暴露于敌百虫(0.1 mg/L - 10 g/L),每30 min分析一次寄生虫的运动。10 g/L处理30 min, 10 mg/L处理3 h,死亡率为100 %;浓度≤ 1 mg/L只导致寄生虫运动能力降低。在体内试验中,96只幼鱼被分为4组:对照组,10 g/L 30 min, 10 mg/L 3 h, 10 mg/L 96 h。10 mg/L处理96 h的效果最高(96.9% %),显著优于其他处理(49.7% %和42.3 %)
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引用次数: 0
Efficacy of plant-based remedies for Varroa destructor control in honey bee colonies: A preliminary study 植物疗法对蜂群杀灭瓦螨的功效:初步研究。
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-10 DOI: 10.1016/j.vetpar.2025.110629
Ľubomír Korený, Michaela Korená Hillayová, Jaroslav Škvarenina
The Western honey bee (Apis mellifera L.) plays a crucial role in global ecosystems and agriculture, yet the ectoparasitic mite Varroa destructor remains a primary cause of severe varroosis and significant colony morbidity and mortality. Current reliance on synthetic acaricides often leads to the development of mite resistance and raises concerns regarding chemical residues in hive products. This has created an urgent need for innovative and effective veterinary strategies for parasite control. This study investigated the efficacy of traditional plant-based remedies as an alternative treatment for V. destructor infestations in honey bee colonies. Herbal decoctions from medicinal plants (e.g., nettle, clove, linden, peppermint, lavender, sage, dandelion), known for their anti-parasitic properties, were applied to bee colonies via aerosol. V. destructor infestation levels were monitored monthly using a non-destructive CO₂-induced narcosis method. Statistical analysis, specifically a Linear Mixed Model (LMM), revealed a significant decrease in mean Varroa infestation from 1.8 % in 2021–1.1 % in 2023 across the experimental colonies (p < 0.000001 for year effect). Furthermore, the LMM confirmed significant differences in efficacy among the tested decoctions (p < 0.000001 for Decoction label effect), with specific extracts (DIII and DV) demonstrating superior performance. These findings highlight a validated, ecologically derived phytotherapeutic approach for Varroa management, demonstrating its potential to significantly reduce mite populations over multiple years without adverse effects on honey bee health. This research provides valuable insights into natural alternatives for parasitic mite control in domesticated animals like honey bees.
西方蜜蜂(Apis mellifera L.)在全球生态系统和农业中起着至关重要的作用,但体外寄生螨瓦螨仍然是造成严重瓦螨病和显著群体发病率和死亡率的主要原因。目前对合成杀螨剂的依赖往往导致螨虫抗药性的发展,并引起对蜂箱产品中化学残留物的关注。这就迫切需要创新和有效的兽医战略来控制寄生虫。本研究调查了传统植物疗法作为蜜蜂种群中破坏性弧菌侵染的替代治疗方法的有效性。从药用植物(如荨麻、丁香、菩提树、薄荷、薰衣草、鼠尾草、蒲公英)中提取的草药煎剂,以其抗寄生虫的特性而闻名,通过气溶胶应用于蜂群。采用非破坏性CO₂诱导麻醉法每月监测V. destructor的感染水平。统计分析,特别是线性混合模型(LMM),显示各实验菌落的平均瓦螨侵染率显著下降,从2021年的1.8 %下降到2023年的1.1 %
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引用次数: 0
Smart farming with AI: Enhancing anemia detection in small ruminants 人工智能智能农业:增强对小反刍动物贫血的检测
IF 2.2 2区 农林科学 Q2 PARASITOLOGY Pub Date : 2025-10-09 DOI: 10.1016/j.vetpar.2025.110627
Sadia Farhana
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引用次数: 0
期刊
Veterinary parasitology
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