Journal of Helminthology最新文献_第8页

Anthelmintic resistance of gastrointestinal nematodes in cattle herds in mid-mountain central France. 法国中部中部山区牛群胃肠线虫的抗虫性。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-26 DOI: 10.1017/S0022149X26101746

L Dravigney, C Chartier, P Grelaud, T Jozan, L Ledieu, M Lopez, J Höglund, N Ravinet

{"title":"Anthelmintic resistance of gastrointestinal nematodes in cattle herds in mid-mountain central France.","authors":"L Dravigney, C Chartier, P Grelaud, T Jozan, L Ledieu, M Lopez, J Höglund, N Ravinet","doi":"10.1017/S0022149X26101746","DOIUrl":"10.1017/S0022149X26101746","url":null,"abstract":"Anthelmintic resistance (AR) in gastrointestinal nematodes is insufficiently studied in cattle in many European regions, including France, where only three studies have been conducted in the north-west. This study evaluated the efficacy of benzimidazoles and avermectins in cattle from a mid-mountain region in central France. Faecal egg count reduction tests (FECRT) were performed in 22 groups of 10-25 calves from 16 dairy or beef farms. Each group received either oral oxfendazole (OFZ, 11 groups) or injectable ivermectin (IVM, 11 groups). Faecal samples were collected in a paired study design before (D0) and after treatment (D10-14 for OFZ, D14-17 for IVM). Individual faecal egg counts (FECs) were determined using the Mini-FLOTAC method, and pooled faecal samples were cultured per group to determine the proportions of Ostertagia and Cooperia larvae using droplet digital PCR. Efficacy classification (resistant, susceptible or inconclusive) was determined for each group according to the WAAVP guidelines, using the fecrt.com web application and the clinical protocol scenario with a grey zone of 90-99%. IVM resistance was detected on 10 of 11 farms, with 33-49% and 51-67% of larvae being Ostertagia and Cooperia after treatment, respectively. The remaining farm had inconclusive results. OFZ resistance was detected on 2 of 11 farms, with 100% and 97% of larvae being Ostertagia after treatment. The remaining 9 farms were classified as susceptible. This study provides valuable local insights into AR, which could help raise awareness among farmers and veterinarians and encourage changes in treatment practices.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e72"},"PeriodicalIF":2.0,"publicationDate":"2026-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148330551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new species of the genus Monoecocestus (Cestoda: Anoplocephalidae) from Lagidium viscacia (Rodentia: Chinchillidae) from the high-altitudes of Peru. 文章标题秘鲁高海拔地区粘足鼠（啮齿目：金鼠科）中单足鼠属一新种（鼠目：金鼠科）。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-24 DOI: 10.1017/S0022149X26101655

H Apaza-Añamuro, C Zapata, D Coronado-Morones, G Torres-Carrera, L Garcia-Prieto, A Oceguera-Figueroa

{"title":"A new species of the genus Monoecocestus (Cestoda: Anoplocephalidae) from Lagidium viscacia (Rodentia: Chinchillidae) from the high-altitudes of Peru.","authors":"H Apaza-Añamuro, C Zapata, D Coronado-Morones, G Torres-Carrera, L Garcia-Prieto, A Oceguera-Figueroa","doi":"10.1017/S0022149X26101655","DOIUrl":"10.1017/S0022149X26101655","url":null,"abstract":"Anoplocephalidae (Cestoda: Cyclophyllidea) is a diverse family, with the subfamily Anoplocephalinae comprising 59 genera that primarily parasitize the digestive tract of rodents and birds. Monoecocestus threlkeldi was originally described from the northern vizcacha, Lagidium peruanum, in Junin, Peru, and subsequently reported in cricetids (Holochilus spp.) in Argentina and Bolivia. In the present study, we describe a new species of the genus Monoecocestus parasitizing the southern vizcacha, Lagidium viscacia, based on specimens collected in Puno, Peru, at an elevation of 3932 m a. s. l. A total of 45 specimens of the new species were obtained and processed for morphological and molecular analysis. For molecular analysis, DNA sequences of three markers were generated: the nuclear 18S, 28S, ITS, and mitochondrial cox1. The molecular data were compared with sequences available in GenBank, confirming its inclusion in the genus Monoecocestus. Morphologically, the new species is similar to M. threlkeldi, but it can be distinguished by its smaller body size, scolex, cirrus pouch, and number of proglottides. The description of the new species Monoecocestus viscaciae improves our understanding of the diversity of cestodes in high-altitude Andean ecosystems and provides new insights into host specificity within the genus Lagidium.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e71"},"PeriodicalIF":2.0,"publicationDate":"2026-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148308445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing the nematocidal antagonism of two nematophagous fungi: Dactylellina candida and Arthrobotrys musiformis (Orbiliales) against Haemonchus contortus in the presence of crude extracts of different nematodes as potential elicitors. 在不同线虫粗提取物作为潜在激发子的情况下，评估两种噬线虫真菌：假丝Dactylellina candida和Arthrobotrys musisformis （Orbiliales）对Haemonchus扭曲的拮抗作用。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-23 DOI: 10.1017/S0022149X26101539

A J Torres-Armendariz, E Gutiérrez-Medina, G Pérez-Anzúrez, G A Bautista-García, A Y Ocampo-Gutiérrez, M E López-Arellano, P Mendoza-de Gives

{"title":"Assessing the nematocidal antagonism of two nematophagous fungi: Dactylellina candida and Arthrobotrys musiformis (Orbiliales) against Haemonchus contortus in the presence of crude extracts of different nematodes as potential elicitors.","authors":"A J Torres-Armendariz, E Gutiérrez-Medina, G Pérez-Anzúrez, G A Bautista-García, A Y Ocampo-Gutiérrez, M E López-Arellano, P Mendoza-de Gives","doi":"10.1017/S0022149X26101539","DOIUrl":"https://doi.org/10.1017/S0022149X26101539","url":null,"abstract":"This study assessed the predatory activity (PA) of Dactylellina candida (Dc) and Arthrobotrys musiformis (Am) against Haemonchus contortus infective larvae (HcIL). It also examined the effect of crude extracts from HcIL, Panagrellus redivivus (Pr), and Turbatryx aceti (Ta) on liquid cultures of these fungi as potential enhancers of their nematocidal activity against HcIL. The fungi were cultured in sweet potato dextrose broth (SPDB), and the corresponding nematode crude extract (NCE) was added to flasks containing the fungus. Control groups included fungi without extracts and media alone. Liquid culture filtrates were assessed at three concentrations (100, 50, and 25 mg/mL) against HcIL during 72 hours at 18-25°C. The highest mortality (86.61%) was observed with Dc stimulated by HcIL crude extract (HcCE) at 100 mg/mL (p < 0.05). Arthrobotrys musiformis showed 47.49% mortality when stimulated with HcCE. Both fungi increased their nematocidal activity when exposed to HcCE, demonstrating their potential nematocidal activity against H. contortus.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e70"},"PeriodicalIF":2.0,"publicationDate":"2026-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148301867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

First molecularly confirmed Angiostrongylus vasorum infection in a dog in Estonia: Translocation risks and diagnostic pitfalls. 在爱沙尼亚的一只狗中首次分子证实血管圆线虫感染：易位风险和诊断缺陷。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-19 DOI: 10.1017/S0022149X26101709

M Mõtsküla, P F Mõtsküla, U Saarma

引用次数: 0

Experimental infection of wild Mastomys natalensis with the parasitic nematode Trichuris mastomysi. 野生石竹寄生线虫感染石竹毛线虫的实验研究。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-18 DOI: 10.1017/S0022149X26101618

M van de Ven, A Massawe, H Leirs, J Mariën

引用次数: 0

Patterns of antiparasitic usage in Golden Retriever breed of dogs: A 9-year cohort study. 金毛猎犬品种犬抗寄生虫使用模式：一项9年队列研究。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-18 DOI: 10.1017/S0022149X26101710

M J Oladoye, B Awosile, O Adekoya, H Rodriguez-Mori, O Akinkuotu

{"title":"Patterns of antiparasitic usage in Golden Retriever breed of dogs: A 9-year cohort study.","authors":"M J Oladoye, B Awosile, O Adekoya, H Rodriguez-Mori, O Akinkuotu","doi":"10.1017/S0022149X26101710","DOIUrl":"https://doi.org/10.1017/S0022149X26101710","url":null,"abstract":"Antiparasitic agents are routinely used in companion animal medicine. However, longitudinal evidence describing real-world usage patterns in dogs remains limited. This study aimed to characterise patterns, routes of administration, temporal trends, and seasonal variation in antiparasitic drug use among Golden Retrievers enrolled in a large prospective cohort study in the United States. A descriptive analysis was conducted to summarise antiparasitic usage data from the Morris Animal Foundation's Golden Retriever Lifetime Study over nine study years (corresponding to years 0 to 8). Percentages with respective 95% CI were used to summarise drug types, therapy combinations, routes of administration, and temporal and seasonal patterns of use. A total of 17,715 antiparasitic use records were analysed. Drug usage pattern was highly concentrated within a limited number of products, with the ivermectin-pyrantel pamoate combination accounting for 23.0% of all recorded use. Other commonly used agents included afoxolaner (9.73%), metronidazole (9.16%), and lufenuron-milbemycin oxime (8.95%). Oral formulations were predominant, representing 65.28% of all administrations. Single-agent therapy accounted for 47.27% of use, while two-drug combination therapy represented 46.65%. The antiparasitic medications spanned multiple pharmacological classes targeting both endo- and ectoparasites, including anthelmintics, ectoparasiticides, and antiprotozoals. Antiparasitic use declined by 1.8% over the study period. We observed a seasonal variation in antiparasitic drug usage, with higher usage during cooler months (winter) and lower use in summer. These findings provide baseline evidence of the burden of endoparasites and ectoparasites in Golden Retriever dogs and highlight the need for stewardship-oriented parasite control strategies in companion animal practice.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e68"},"PeriodicalIF":2.0,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148271842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrative taxonomy of Thripinema usitatum n. sp., a new entomoparasitic nematode associated with the bean flower thrips Megalurothrips usitatus in China. 与豆花蓟马（Megalurothrips usitatus）有关的新虫寄生线虫的综合分类。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-18 DOI: 10.1017/S0022149X26101515

W-H Chen, W-J Qiu, Y-F Lu, W-H Wu, H-P Pan, C-L Xu

{"title":"Integrative taxonomy of Thripinema usitatum n. sp., a new entomoparasitic nematode associated with the bean flower thrips Megalurothrips usitatus in China.","authors":"W-H Chen, W-J Qiu, Y-F Lu, W-H Wu, H-P Pan, C-L Xu","doi":"10.1017/S0022149X26101515","DOIUrl":"https://doi.org/10.1017/S0022149X26101515","url":null,"abstract":"A new species of thrips-parasitic nematode, Thripinema usitatum n. sp. (Tylenchomorpha: Allantonematinae), is described from thrips collected from flowers in Hainan Province, China. The species is identified using an integrative approach combining detailed morphology, molecular phylogenetic analyses, and biological observations. Thripinema usitatum n. sp. exhibits pronounced sexual dimorphism and a complex life cycle, including obese parasitic females, vermiform infective females, and free-living males with degenerate feeding structures within the body of thrips. The new species is distinguished from its congeners by the absence of a stylet in free-living males, a distinctive two-part bursa extending nearly to the tail terminus, and characteristic shapes of parasitic females and male tails. Molecular characterization was performed using three markers (18S rRNA, 28S D2-D3 rRNA, and mitochondrial cytochrome c oxidase subunit I, mtCOI). Phylogenetic analyses based on 28S D2-D3 rRNA and mtCOI partial sequences consistently recovered T. usitatum n. sp. as a well-supported, monophyletic lineage clearly separated from other entomophilic nematodes. Among the markers examined, mtCOI provided the highest discriminatory power. Biological observations revealed that T. usitatum n. sp. infects thrips at all developmental stages, with a strong prevalence in adult females. Multiple nematode life stages frequently co-occurred within individual hosts, and infection intensities ranged from 1 to 433 nematodes per thrips. These results expand the known diversity of Thripinema and provide a robust framework for future systematic and ecological studies of thrips-parasitic nematodes.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e59"},"PeriodicalIF":2.0,"publicationDate":"2026-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148271813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

When pooling fails: low-intensity Angiostrongylus cantonensis infections in Theba pisana result in false-negativity. 当汇集失败时：在底巴pisana中低强度的广州管圆线虫感染导致假阴性。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-17 DOI: 10.1017/S0022149X26101588

L Anettová, S Jaume-Ramis, C Paredes-Esquivel, D Modry

引用次数: 0

Investigating a Sprague-Dawley rat-based anthelmintic assay using Trichostrongylus colubriformis. 研究了一种以Sprague-Dawley大鼠为基础的使用色状毛圆线虫的驱虫剂测定方法。

IF 2 3区生物学

Journal of Helminthology Pub Date : 2026-06-17 DOI: 10.1017/S0022149X26101679

Grethe Neethling, Daryl Codron, Luther van der Mescht

{"title":"Investigating a Sprague-Dawley rat-based anthelmintic assay using Trichostrongylus colubriformis.","authors":"Grethe Neethling, Daryl Codron, Luther van der Mescht","doi":"10.1017/S0022149X26101679","DOIUrl":"https://doi.org/10.1017/S0022149X26101679","url":null,"abstract":"In vivo anthelmintic assay models are essential for evaluating candidate compounds in target species. Several rodent-helminth systems have been developed, with the Cobb-Wistar rat-T. colubriformis model emerging as promising for early-stage screening. Although this model has demonstrated utility, the development of an alternative model using a more widely accessible rat strain represents a valuable opportunity for advancing in vivo screening of anthelmintics. This study evaluated different immunosuppressants and regimens to identify treatments yielding the highest and most consistent worm burdens in experimentally infected Sprague-Dawley rats. Thirty rats were assigned to five groups (n = 6). Group 1 received unmedicated feed (negative control), while Groups 2, 3, and 4 received hydrocortisone acetate (HCA) in their diet at 60 ppm, 80 ppm, and a two-phase regimen of 200 ppm followed by 60 ppm, respectively. Group 5 received intramuscular methylprednisolone acetate (MPA) on three occasions. All animals were orally infected with T. colubriformis third-stage larvae, and necropsies were performed on Day 13 post-infection to recover worm burdens. Treatment had no effect on worm counts. The 80-ppm HCA group produced the highest mean burden with high variance; the 200:60 ppm group showed lower counts but less variance, and the 60-ppm HCA and MPA groups were comparable to controls. There was insufficient evidence to support the Sprague-Dawley rat-T. colubriformis model but, given the results of this study, further investigation and development are warranted.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e67"},"PeriodicalIF":2.0,"publicationDate":"2026-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148264720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Avoidance of parasites by blue mussels Mytilus edulis: effect of parasite species and chemosensory cues. 蓝贻贝（Mytilus edulis）对寄生虫的躲避：寄生虫种类和化学感觉线索的影响。

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2026-06-16 DOI: 10.1017/S0022149X26101643

P Kibak, K N Mouritsen

{"title":"Avoidance of parasites by blue mussels Mytilus edulis: effect of parasite species and chemosensory cues.","authors":"P Kibak, K N Mouritsen","doi":"10.1017/S0022149X26101643","DOIUrl":"https://doi.org/10.1017/S0022149X26101643","url":null,"abstract":"The concept of 'ecology of fear' recognises the importance of non-consumptive effects of predators inspiring fear in their prey, but has subsequently been broadened to include the non-consumptive effects of parasites on their hosts. Here, we experimentally tested whether blue mussels (Mytilus edulis) exhibit species-specific avoidance behaviour in response to infective transmission stages (cercariae) of three trematode species: Himasthla elongata and Renicola roscovita, both of which use blue mussels as hosts, and Cryptocotyle lingua, which parasitises fish. Furthermore, we investigated whether avoidance behaviour could be triggered solely by chemical cues. The results show that mussels reduced clearance rates by 34% in the presence of H. elongata alone and of 51% in the presence of H. elongata and R. roscovita in sympatry, which was comparable to previously reported direct consumptive effects of infection on filtration activity. The presence of C. lingua and R. roscovita alone had no significant effect on clearance rate. The observed reduction in filtration activity resulted in lower infection rates of experimental mussels. Moreover, mussels reduced clearance rates by 42% in the mere presence of chemical cues from the first intermediate host Littorina littorea, while exudates of H. elongata had no additional negative effect. It is evident that a non-consumptive parasite effect can significantly reduce the filtration activity of experimental blue mussels. Considering the magnitude of this reduction and the widespread occurrence of parasitic trematodes, it is reasonable to expect that fear of parasitism has ecological consequences for the functioning role of mussels.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e62"},"PeriodicalIF":1.6,"publicationDate":"2026-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148257861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0