Parasitology最新文献_第10页

Lissonema sicki, an emerging air sac nematode of European owls: introduction, host switching and rapid establishment on a Mediterranean island. 欧洲猫头鹰新出现的气囊线虫 Lissonema sicki：引进、宿主转换和在地中海岛屿上的快速建立。

IF 2.1 3区医学

Parasitology Pub Date : 2024-07-01 Epub Date: 2024-09-30 DOI: 10.1017/S0031182024000805

Sebastià Jaume-Ramis, Sofía Delgado-Serra, Jordi Miquel, Nieves Negre, Ugo Mameli, Carles Feliu, Claudia Paredes-Esquivel

{"title":"Lissonema sicki, an emerging air sac nematode of European owls: introduction, host switching and rapid establishment on a Mediterranean island.","authors":"Sebastià Jaume-Ramis, Sofía Delgado-Serra, Jordi Miquel, Nieves Negre, Ugo Mameli, Carles Feliu, Claudia Paredes-Esquivel","doi":"10.1017/S0031182024000805","DOIUrl":"10.1017/S0031182024000805","url":null,"abstract":"In recent years, air sac parasitic helminths have been reported to cause severe disease in birds. In addition, various species appear to be expanding and infecting new avian hosts in various regions worldwide. In this context, an air sac nematode was initially detected in 2014 infecting the Eurasian scops owl, hospitalized in the local wildlife hospital in Mallorca (Balearic Islands, Spain). Years later, the parasite was detected in 2 other owl species. Air sac nematodes had never been reported in the Mallorcan Strigiformes before. A comprehensive molecular and morphological characterization analysis, including scanning electron microscopy, was required for species confirmation. The species was identified as Lissonema sicki, a parasite infrequently reported in South American owls. Since its first introduction to Mallorca, it has dramatically increased in prevalence in hospitalized birds, being highly prevalent in the Eurasian scops owl (41%), in the long-eared owl (11%) and in the barn owl (4%). The introduction pathway of this parasite to Europe remains unknown. This discovery underscores the expanding range and impact of L. sicki, emphasizing the importance of ongoing surveillance and research to comprehend and manage the implications of its emergence in new territories.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"784-794"},"PeriodicalIF":2.1,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11579039/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142351808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cystic echinococcosis in Cyprus: historical retrospective and finding of 2 Echinococcus granulosus sensu lato species. 塞浦路斯的囊性棘球蚴病：历史回顾和发现两种广义棘球蚴。

IF 2.1 3区医学

Parasitology Pub Date : 2024-07-01 Epub Date: 2024-05-08 DOI: 10.1017/S0031182024000520

Azzurra Santoro, Panagiotis Konstantinou, Federica Santolamazza, Adriano Casulli

{"title":"Cystic echinococcosis in Cyprus: historical retrospective and finding of 2 Echinococcus granulosus sensu lato species.","authors":"Azzurra Santoro, Panagiotis Konstantinou, Federica Santolamazza, Adriano Casulli","doi":"10.1017/S0031182024000520","DOIUrl":"10.1017/S0031182024000520","url":null,"abstract":"The island of Cyprus was a historical endemic area for cystic echinococcosis (CE) in the Mediterranean. During the last decades, Cyprus has been an open-air laboratory and a model for testing and implementing control measures aiming to eliminate CE as a public health problem. Despite control and surveillance measures implemented during last 50 years, molecular characterization of Echinococcus granulosus sensu lato specimens has been never provided. In February 2023, the carcass of a stray dog collected in the Nicosia district was examined by the Veterinary Services and found infected with Echinococcus spp. worms. The worms were sent to the European Union Reference Laboratory (EURLP) for species/genotype identification. The sequences analyses of nad2 and nad5 genes allowed us to identify the tapeworms as Echinococcus canadensis, genotype G7b. In November 2023, a parasitic liver cyst was observed during the post-mortem examination of a mouflon from the same area of the dog's finding. The cyst sample was also referred to EURLP for identification and comparison with tapeworms previously collected from the dog. The sequences analysis of cox1 gene allowed to identify the cyst as E. granulosus sensu stricto, genotype G1. The finding of 2 different species of E. granulosus s.l. in a limited area raises epidemiological questions on the origin of the samples: whether distinct transmission cycles are present or a recent introduction event have occurred. From a public health perspective, it will be essential to conduct further molecular epidemiology studies to clarify the recent transmission dynamics of Echinococcus species in Cyprus.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"763-768"},"PeriodicalIF":2.1,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11579035/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140877041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anaplasma platys and Rickettsia massiliae in Rhipicephalus sanguineus sensu stricto ticks collected on dogs in the Patagonian region of Argentina. 在阿根廷巴塔哥尼亚地区采集到的狗身上的 Rhipicephalus sanguineus sensu stricto 蜱虫体内的 Platys Anaplasma 和 Massiliae 立克次体。

IF 2.1 3区医学

Parasitology Pub Date : 2024-07-01 Epub Date: 2024-10-14 DOI: 10.1017/S0031182024000933

Lara M I Maas, Marina Winter, Verónica Herrmann, Sergio D Abate, Anna Obiegala, Santiago Nava, Patrick S Sebastian

{"title":"Anaplasma platys and Rickettsia massiliae in Rhipicephalus sanguineus sensu stricto ticks collected on dogs in the Patagonian region of Argentina.","authors":"Lara M I Maas, Marina Winter, Verónica Herrmann, Sergio D Abate, Anna Obiegala, Santiago Nava, Patrick S Sebastian","doi":"10.1017/S0031182024000933","DOIUrl":"10.1017/S0031182024000933","url":null,"abstract":"The aim of this study was to examine the presence of tick-borne rickettsial bacteria in Rhipicephalus sanguineus sensu stricto ticks collected from dogs in the Patagonian region of Argentina. Fourteen stray dogs from Valcheta, Río Negro province, Argentina were examined for the presence of R. sanguineus s.s. ticks. Ninety ticks were collected and identified to species level. DNA was extracted and analysed by conventional PCR assays for the presence of tick-borne bacteria belonging to the genera Anaplasma, Ehrlichia and Rickettsia. Thirty-three tick pools were tested by different PCR assays of which 3 were positive for Anaplasmataceae bacteria. From the 3 Anaplasmataceae positive samples, 2 partial 16S rDNA sequences were generated and belonging to Anaplasma platys, the causative agent of canine cyclic thrombocytopenia. Two tick samples were positive in Rickettsia specific PCR assays and were identified by phylogenetic analysis as Rickettsia massiliae, a member of the spotted fever group rickettsiae. The results of this study demonstrate the molecular detection of 2 rickettsial bacteria in R. sanguineus s.s. in a region of Argentina where no data were available so far.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"848-852"},"PeriodicalIF":2.1,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11578885/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142472246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Expanding on expansus: a new species of Scaphanocephalus from North America and the Caribbean based on molecular and morphological data. Expanding on expansus：基于分子和形态学数据的北美洲和加勒比海 Scaphanocephalus 新种。

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-05-21 DOI: 10.1017/S0031182024000647

Sean A Locke, Dana M Calhoun, José M Valencia Cruz, Erika T Ebbs, Sandra C Díaz Pernett, Vasyl V Tkach, John M Kinsella, Mark A Freeman, Christopher A Blanar, Pieter T J Johnson

{"title":"Expanding on expansus: a new species of Scaphanocephalus from North America and the Caribbean based on molecular and morphological data.","authors":"Sean A Locke, Dana M Calhoun, José M Valencia Cruz, Erika T Ebbs, Sandra C Díaz Pernett, Vasyl V Tkach, John M Kinsella, Mark A Freeman, Christopher A Blanar, Pieter T J Johnson","doi":"10.1017/S0031182024000647","DOIUrl":"10.1017/S0031182024000647","url":null,"abstract":"Members of the genus Scaphanocephalus mature in accipitrids, particularly osprey, Pandion haliaetus, with metacercaria causing Black Spot Syndrome in reef fishes. In most of the world, only the type species, Scaphanocephalus expansus (Creplin, 1842) has been reported. Recent molecular studies in the Western Atlantic, Mediterranean and Persian Gulf reveal multiple species of Scaphanocephalus, but have relied on 28S rDNA, mainly from metacercariae, which limits both morphological identification and resolution of closely related species. Here we combine nuclear rDNA with mitochondrial sequences from adult worms collected in osprey across North America and the Caribbean to describe species and elucidate life cycles in Scaphanocephalus. A new species described herein can be distinguished from S. expansus based on overall body shape and size. Phylogenetic analysis of the whole mitochondrial genome of Scaphanocephalus indicates a close relationship with Cryptocotyle. We conclude that at least 3 species of Scaphanocephalus are present in the Americas and 2 others are in the Old World. Specimens in the Americas have similar or identical 28S to those in the Mediterranean and Persian Gulf, but amphi-Atlantic species are unlikely in light of divergence in cytochrome c oxidase I and the lack of amphi-Atlantic avian and fish hosts. Our results provide insight into the geographic distribution and taxonomy of a little-studied trematode recently linked to an emerging pathology in ecologically important reef fishes.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"679-691"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474018/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141071670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gastrointestinal nematode infection during pregnancy and lactation enhances spatial reference memory and reduces indicators of anxiety-like behaviour in uninfected adult female mouse offspring. 妊娠期和哺乳期胃肠道线虫感染可增强未感染成年雌性小鼠后代的空间参照记忆，并减少其焦虑行为指标。

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-05-29 DOI: 10.1017/S0031182024000696

Sophia Noel, Ryan LaFrancois, Marilyn E Scott

{"title":"Gastrointestinal nematode infection during pregnancy and lactation enhances spatial reference memory and reduces indicators of anxiety-like behaviour in uninfected adult female mouse offspring.","authors":"Sophia Noel, Ryan LaFrancois, Marilyn E Scott","doi":"10.1017/S0031182024000696","DOIUrl":"10.1017/S0031182024000696","url":null,"abstract":"Maternal bacterial and viral infections that induce neuroinflammation in the developing brain are associated with impaired cognitive function and increased anxiety in the offspring. In contrast, maternal infection with the immunoregulatory murine gastrointestinal (GI) nematode, Heligmosomoides bakeri, appears to benefit neurodevelopment as juvenile 2- and 3-week-old male and female offspring had enhanced spatial memory, which may be due to a Th2/Treg biased neuroimmune environment. Here, the impact of maternal H. bakeri infection during pregnancy and lactation on the spatial and anxiety-like behaviours of adult, 3-month-old uninfected male and female offspring was explored for the first time. It was observed that adult female offspring of H. bakeri-infected dams had enhanced spatial reference memory and reduced anxiety-like behaviour compared to females of uninfected dams. These effects were not observed in adult male offspring. Thus, the positive influence of a maternal GI nematode infection on spatial memory of juvenile offspring persists in adult female offspring.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"722-731"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474017/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141162230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Ecto- and endoparasites of common reedbuck, Redunca arundinum, at 2 localities in KwaZulu-Natal Province, South Africa: community and network structure. 南非夸祖鲁-纳塔尔省两个地方的普通芦鸭（Redunca arundinum）的外寄生虫和内寄生虫：群落和网络结构。

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-05-27 DOI: 10.1017/S0031182024000532

Kerstin Junker, Joop Boomker, Ivan G Horak, Boris R Krasnov

{"title":"Ecto- and endoparasites of common reedbuck, Redunca arundinum, at 2 localities in KwaZulu-Natal Province, South Africa: community and network structure.","authors":"Kerstin Junker, Joop Boomker, Ivan G Horak, Boris R Krasnov","doi":"10.1017/S0031182024000532","DOIUrl":"10.1017/S0031182024000532","url":null,"abstract":"Parasite community structure is governed by functional traits of hosts and parasites. Notably, parasite populations and communities respond to host social and spatial behaviour. Many studies demonstrating these effects dealt with small-bodied host species, while the influence of host social patterns on parasite communities in large hosts remains understudied. In an earlier study on nyalas (Tragelaphus angasii), host age was more important than sex in structuring helminth communities and networks, but the influence of both was mediated by local environmental conditions, creating different locality patterns. Common reedbuck (Redunca arundinum) differ from nyalas in spatial and social behaviour. Based on helminth and ectoparasite data from 56 reedbuck examined at 2 localities in KwaZulu-Natal Province, we asked which patterns are similar and which differ between the 2 host species. Similar to nyalas, reedbuck age was more important than sex in structuring communities and networks. However, local environmental conditions exerted the strongest influence on transmission patterns, especially in ectoparasites. Complex interactions between reedbuck traits, parasite traits and local environmental conditions modulated the risk of infection differently at the 2 sites, confirming our earlier findings in nyalas that pooling data from different locations may obscure location-specific parasite community patterns. Similarities between patterns in reedbuck and nyalas, despite their behavioural differences, suggest some common patterns in parasite community ecology that, in turn, are determined mostly by parasite traits and population dynamics.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"657-670"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474021/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141155665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cytokine profiles, blood parasite load and clinical features of visceral leishmaniasis in West Pokot County, Kenya. 肯尼亚西博科特县内脏利什曼病的细胞因子谱、血液寄生虫量和临床特征。

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-09-23 DOI: 10.1017/S0031182024000751

Norbert van Dijk, Jane Carter, David Kiptanui, Elena Pinelli, Henk Schallig

{"title":"Cytokine profiles, blood parasite load and clinical features of visceral leishmaniasis in West Pokot County, Kenya.","authors":"Norbert van Dijk, Jane Carter, David Kiptanui, Elena Pinelli, Henk Schallig","doi":"10.1017/S0031182024000751","DOIUrl":"10.1017/S0031182024000751","url":null,"abstract":"Visceral leishmaniasis (VL) is a severe infectious disease caused by protozoan parasites of the Leishmania donovani complex. Blood cytokine concentrations in VL patients can inform us about underlying immunopathogenesis and may serve as a biomarker for treatment effectiveness. However, cytokine levels have not yet been studied in VL patients from Kenya, where case load is high. This study measured the serum cytokine profile, blood parasite load and clinical and haematological features of VL patients from West Pokot County, Kenya, over the course of treatment with sodium stibogluconate and paromomycin (SSG-PM). VL patients recruited at the hospital presented with splenomegaly and weight loss, and frequently had pancytopenia and anaemia. Median Leishmania parasite load in blood, determined with real-time polymerase chain reaction, was 2.6 × 104 parasite equivalents mL−1. Compared to endemic healthy controls, serum interferon gamma (IFN-γ), interleukin 5 (IL-5), IL-6, IL-10, IL-12p70, IL-17A and IL-27 were significantly elevated in untreated VL patients. Severe VL was associated with higher IL-10 and lower IFN-γ levels. After 17 daily injections with SSG-PM, disease symptoms disappeared, leukocyte and thrombocyte counts significantly increased, and blood parasite load decreased to undetectable levels in all VL patients. There was a significant decrease in IL-10 and IL-6, whereas IL-17A levels increased; the remaining cytokines showed no significant concentration change during treatment. In conclusion, the results suggest that SSG-PM treatment of VL patients from West Pokot was effective. Moreover, both inflammatory and regulatory immune responses appeared to decrease during treatment, although the increase in IL-17A could reflect a partial continuation of immune activation.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"753-761"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474019/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142293105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Description and circadian rhythms of Chandlerella sinensis Li, 1933 (Nematoda; Onchocercidae), with remarks of microfilariae effects on the host health. Chandlerella sinensis Li, 1933（线虫纲；盘尾丝虫科）的描述和昼夜节律，以及微丝蚴对宿主健康的影响。

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-09-23 DOI: 10.1017/S0031182024000738

Rasa Binkienė, Ralph E T Vanstreels, Mélanie Duc, Rasa Bernotienė

{"title":"Description and circadian rhythms of Chandlerella sinensis Li, 1933 (Nematoda; Onchocercidae), with remarks of microfilariae effects on the host health.","authors":"Rasa Binkienė, Ralph E T Vanstreels, Mélanie Duc, Rasa Bernotienė","doi":"10.1017/S0031182024000738","DOIUrl":"10.1017/S0031182024000738","url":null,"abstract":"During investigation of common linnet (Linaria cannabina) blood using the buffy coat method one bird with microfilariae in the blood was found. The morphometric description of adult worms corresponded to the Chandlerella sinensis. This species was found for the first time in common linnets. DNA sequences of cox1 and 28S gene fragments of adult worm recovered during necropsy was identical to that from the microfilariae in the bird blood. Phylogenetic analysis of the cox1 gene fragment clustered this parasite with Chandlerella quiscali. Histological examination revealed the presence of microfilariae in the lumen of small capillaries and other blood vessels in different organs, but no inflammations were notice. The greatest number of microfilariae was in the lungs. Even if there was no inflammation, but vessels associated with the lungs were markedly distended with blood, parabronchial walls were thickened and, in some cases, almost completely obstructing the lumen. The large number of microfilariae in lungs indicates possible disturbance of gas exchange in the lungs adversely affected the ability of the bird to exercise and made breathing difficult at rest. The investigation of circadian rhythm of the microfilariae showed that C. sinensis microfilariae in blood of common linnet were more numerous at night and morning and less numerous at midday. The survival rate of mosquitoes infected with C. sinensis microfilariae was significantly lower than that of uninfected mosquitoes.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"732-743"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474015/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142293106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Echinococcus multilocularis infection affects risk-taking behaviour in Microtus arvalis: adaptive manipulation? 多角棘球蚴感染影响箭尾狒狒的冒险行为：适应性操纵？

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-05-20 DOI: 10.1017/S0031182024000507

Matilde Martini, Teila Cioli, Thomas Romig, Anna Gagliardo, Dimitri Giunchi, Marco Zaccaroni, Alessandro Massolo

{"title":"Echinococcus multilocularis infection affects risk-taking behaviour in Microtus arvalis: adaptive manipulation?","authors":"Matilde Martini, Teila Cioli, Thomas Romig, Anna Gagliardo, Dimitri Giunchi, Marco Zaccaroni, Alessandro Massolo","doi":"10.1017/S0031182024000507","DOIUrl":"10.1017/S0031182024000507","url":null,"abstract":"Manipulation of host behaviour by parasites to enhance transmission to the next host is a fascinating phenomenon that has interested scientists since the 1970s. It has been proposed that infection with the cestode Echinococcus multilocularis produces an impairment of the antipredatory behaviour in the rodent intermediate host common vole, Microtus arvalis, which may facilitate transmission of the tapeworm to the canid final host. In this study, we observed the behaviour of infected common voles at 12 weeks post-infection, when protoscoleces production and maturation commonly occurs, in order to assess behavioural changes compared to uninfected controls, that might ease predation in the wild. Infected and uninfected voles were monitored for 24 h to observe their spontaneous activity. In addition, the next day, both infected and uninfected voles were subjected to 4 different behavioural tests: open field test, barrier test, platform test and air-puff test in a running wheel. No significant difference between uninfected and infected voles emerged during the behavioural tests. However, observation of spontaneous activity revealed that infected voles increased their feeding frequency and spent significantly more time above bedding even when not eating, compared to the uninfected controls. In the wild, these behavioural changes increase the animals exposure to predators, raising their chance of becoming prey. These findings are the first direct evidence consistent with behavioural manipulation by E. multilocularis on common voles.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"650-656"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474016/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141065841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Use of stable isotope ratio analysis to investigate the biology and clinical significance of seal parasites. 利用稳定同位素比值分析研究海豹寄生虫的生物学特性和临床意义。

IF 2.1 3区医学

Parasitology Pub Date : 2024-06-01 Epub Date: 2024-09-25 DOI: 10.1017/S003118202400074X

Annetta Zintl, Michelle Imlau, Jacklyn Schertzer, Han Zhang, Audrey Saint-Marc, Olaf Schmidt, Oscar Toomey, Hanne Jahns

{"title":"Use of stable isotope ratio analysis to investigate the biology and clinical significance of seal parasites.","authors":"Annetta Zintl, Michelle Imlau, Jacklyn Schertzer, Han Zhang, Audrey Saint-Marc, Olaf Schmidt, Oscar Toomey, Hanne Jahns","doi":"10.1017/S003118202400074X","DOIUrl":"10.1017/S003118202400074X","url":null,"abstract":"Stranded seals are often infected with a broad range of parasites, although whether they are the cause of significant morbidity or an incidental finding is usually unclear. In this study we used stable isotope ratio analysis, a method frequently used to investigate food webs, to explore the extent to which common seal parasites feed directly on host tissue and fluids or absorb host-derived metabolites, which in turn may give an indication of their potential impact on the host's health. The trophic discrimination factor Δ15N for the nasal mite, Halarachne halichoeri, was mostly positive, ranging between −0.015 and 3.2‰ (n = 6), while for the Acanthocephalan worm, Corynosoma strumosum and the anisakid nematode, Pseudoterranova decipiens, Δ15N ranged between −4.2 and −2.0‰ (n = 7), and between −6.7 and −0.8‰ (n = 5) respectively. In the case of the lungworm, Otostrongylus circumlitus, Δ15N measured between −5.6 and 0‰ for worms collected in the stomach (n = 5), between −1.1 and 0.2‰ for worms collected from the heart (n = 3), between −0.7 and 1.9‰ for worms situated in the lungs (n = 4). Based on Δ15N, parasites could be clearly divided into those that were on a higher trophic level than their host suggesting a predator–prey-like relationship, and those that were not. It is hypothesized that Δ15N may be indicative of the clinical significance of parasite–host associations.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"744-752"},"PeriodicalIF":2.1,"publicationDate":"2024-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11474010/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142351810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0