Journal of Helminthology最新文献_第8页

Seasonal and site specific variation in the component community structure of intestinal helminths in Apodemus sylvaticus from three contrasting habitats in south-east England 英格兰东南部三种截然不同的栖息地Apodemus sylvaticus肠道蠕虫群落结构的季节性变化和特定地点的变化

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00700022

M.A. Abu-Madi, J.M. Behnke, J.W. Lewis, F.S. Gilbert

{"title":"Seasonal and site specific variation in the component community structure of intestinal helminths in Apodemus sylvaticus from three contrasting habitats in south-east England","authors":"M.A. Abu-Madi, J.M. Behnke, J.W. Lewis, F.S. Gilbert","doi":"10.1017/s0022149x00700022","DOIUrl":"https://doi.org/10.1017/s0022149x00700022","url":null,"abstract":"Seasonal fluctuations in the prevalence and abundance of infection with intestinal helminths were studied in Apodemus sylvaticus (wood mouse, n = 399), from three contrasting habitats in southern England, to test the hypothesis that both intrinsic (host sex, age) and extrinsic (season, site) factors influence parasite species richness and abundance. Five species of helminths were recovered but only one of these (Capillaria murissylvatici) was site-specific (Dungeness). Total species richness was therefore 5 at Dungeness and 4 at the other two sites. Mean species richness was 1.4, but in adult mice there was a pronounced difference between the sites, and an independent highly significant effect of season. Syphacia stroma and Corrigia vitta both showed marked differences between sites in respect of prevalence and abundance of infection. Capillaria murissylvatici was encountered at Dungeness mostly in the spring whereas seasonal changes in abundance ofS. stroma were consistent across all three sites. Seasonal fluctuations in the abundance of Catenotaenia pusilla were compounded by differences between sites. Host sex was not a significant factor in any species, although a posteriorianalysis of S. stromaworm burdens for the Isle of Wight site revealed a moderate local sex effect. Overall the principal determinants of variation in helminth burdens were the extrinsic factors, site and season.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578980","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

Metacercarial aggregation in Digenea (Fasciola hepatica and Paramphistomum daubneyi): environmental or species determinism? Digenea（肝豆状镰刀菌（Fasciola hepatica）和Paramphistomum daubneyi）中的蛔虫聚集：环境决定论还是物种决定论？

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00701477

M. Abrous, C. Vareille-Morel, D. Rondelaud, G. Dreyfuss, J. Cabaret

{"title":"Metacercarial aggregation in Digenea (Fasciola hepatica and Paramphistomum daubneyi): environmental or species determinism?","authors":"M. Abrous, C. Vareille-Morel, D. Rondelaud, G. Dreyfuss, J. Cabaret","doi":"10.1017/s0022149x00701477","DOIUrl":"https://doi.org/10.1017/s0022149x00701477","url":null,"abstract":"Metacercarial aggregation of Fasciola hepatica and Paramphistomum daubneyi was studied under experimental conditions to determine if the formation of these aggregates was influenced by environmental factors, or it was a characteristic of trematode species. This process was studied using the confinement of infected snails on the bottom of Petri dishes (diameter, 14 cm) for 3 days. The formation of metacercarial aggregates of F. hepatica was not significantly modified by environmental factors such as intensity and duration of lighting, quality and volume of water. Metacercariae of F. hepatica were more numerous on the Petri dish walls and 63.9% of them constituted aggregates. In contrast, most metacercariae of P. daubneyi were found on the Petri dish bottoms and 78.3% of them were isolated or in groups of two metacercariae each. The mean number of metacercariae per aggregate ranged from 6.7 to 12.2 in the case of F. hepatica, and from 2.7 to 4.5 in the case of P. daubneyi. However, these mean numbers were independent of the site of cercarial attachment. The tendency of cercariae to form metacercarial aggregations was a characteristic of F. hepatica and was species determined.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578984","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

Strategies for nematode transmission: selective migration of Trichostrongylus tenuis infective larvae 线虫传播策略：天牛三代线虫感染性幼虫的选择性迁移

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x0070157x

L.M. Saunders, D.M. Tompkins, P.J. Hudson

{"title":"Strategies for nematode transmission: selective migration of Trichostrongylus tenuis infective larvae","authors":"L.M. Saunders, D.M. Tompkins, P.J. Hudson","doi":"10.1017/s0022149x0070157x","DOIUrl":"https://doi.org/10.1017/s0022149x0070157x","url":null,"abstract":"Successful transmission of macroparasites is dependent on exposure of susceptible hosts to free-living infective stages. When these hosts are herbivores that feed mostly on a single food plant then natural selection should favour those infective larvae that selectively ascend this main food plant. Red grouse feed predominantly on heather, Calluna vulgaris, so we predict that the infective larvae (L3) of the caecal nematode Trichostrongylus tenuis selectively locate and ascend heather plants. To determine whether the presence of heather influences the horizontal dispersal of T. tenuis L3 across soil, the movement of L3 across trays of soil with and without heather was investigated in the laboratory. More T. tenuis L3 were recovered from soil when heather was present, implying that larval migration may be influenced by chemical cues produced by heather plants. This was investigated in a second experiment, in which the horizontal dispersal of T. tenuis larvae was examined in the presence of heather and grass vegetation. This trial was repeated with larvae of a second species, Haemonchus contortus, a nematode whose hosts feed on a wide range of grass and shrub species. Significantly more larvae of both nematode species were recovered in the region of the heather than the grass or controls. This implies that T. tenuis and H. contortus L3 exhibit selective migration towards heather, perhaps reflecting a general response to plant cues which may be stronger for heather than for grass.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578986","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

Molecular evidence for the presence of a G7 genotype of Echinococcus granulosus in Slovakia 斯洛伐克存在颗粒棘球蚴 G7 基因型的分子证据

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00700873

V. Šnábel, S. D'Amelio, K. Mathiopoulos, L. Turčeková, P. Dubinský

引用次数: 0

The life-cycle of the flatfish nematode Cucullanus heterochrous 比目鱼线虫 Cucullanus heterochrous 的生命周期

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x0070109x

M. Køie

{"title":"The life-cycle of the flatfish nematode Cucullanus heterochrous","authors":"M. Køie","doi":"10.1017/s0022149x0070109x","DOIUrl":"https://doi.org/10.1017/s0022149x0070109x","url":null,"abstract":"Mature specimens of Cucullanus heterochrous Rudolphi, 1802 (Nematoda: Cucullanidae) were obtained from the intestine of the flounder, Platichthys flesus, from Danish waters. Eggs embryonate in seawater but do not hatch. Fully developed larvae pressed out of eggs are 430 μm long with amphids and dereids and enclosed within the cuticle of a previous larval stage. Infective larvae are believed to be in their third stage. Experimental studies showed that the polychaetes, Nereis spp., Scoloplos armiger, Brada villosa and Capitella sp., may act as intermediate hosts. In N. diversicolor the larvae increase their length to 1 mm within four weeks (15°C) without moulting. Experimental infections showed that larvated eggs are not infective to fish, whereas >550 μm long larvae from polychaetes survived in 4–24 cm long flounders and plaice, Pleuronectes platessa. Third-stage larvae 550 μm to 1.1 mm long were found in the submucosa of the intestine one week post infection. At a length of about 800 μm to 1.4 mm they moult to fourth-stage larvae. Fourth-stage larvae, immature and mature worms occur in the intestine and rectum. Fourth-stage larvae and adults survived experimental transfer from one flounder to another. Similar developmental stages survived for two weeks in the intestine of experimentally infected cod, Gadus morhua.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579107","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

In vitro antifilarial activity of extracts of the medicinal plant Cardiospermum halicacabum against Brugia pahangi 药用植物 Cardiospermum halicacabum 的提取物对 Brugia pahangi 的体外抗丝虫活性

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00700964

W. Khunkitti, Y. Fujimaki, Y. Aoki

{"title":"In vitro antifilarial activity of extracts of the medicinal plant Cardiospermum halicacabum against Brugia pahangi","authors":"W. Khunkitti, Y. Fujimaki, Y. Aoki","doi":"10.1017/s0022149x00700964","DOIUrl":"https://doi.org/10.1017/s0022149x00700964","url":null,"abstract":"The in vitro effects of ethanol and aqueous extracts of the medicinal plant Cardiospermum halicacabum on adult worms and microfilariae of Brugia pahangi were investigated. With or without the plant extracts in culture medium, the motility of adult worms, microfilariae and microfilarial release from female worms were monitored daily. After 7 days of culture, viability or tissue damage of adult worms was assessed using the MTT assay. At > 500 μg ml-1, the aqueous extract significantly reduced motility of adult females after 24 h of exposure and adult males after 3 days. The aqueous extract, at > 500 μg ml-1, also significantly reduced microfilarial release from female worms, starting on day 2. The reduction in the motility of adult worms and the pattern of microfilarial release from female worms were concentration and time dependent. The MTT assay results revealed that adult worms cultured in the presence of aqueous extracts at > 500 μg ml-1 were damaged. However, the aqueous extract did not affect the motility of microfilariae with the exception of those in higher concentration extracts. Higher concentrations of ethanol extracts (2 mg ml-1) inhibited both the motility of adult worms and the release of microfilariae from females. Little effect of ethanol extracts was detected by the MTT assay, as only slight damage was caused to worms exposed only to the highest concentration (2 mg ml-1). However, ethanol extract at 500 μg ml-1 rapidly reduced the motility of microfilariae on day 2. The present study revealed that an aqueous extract of C. halicacabum has mild but definite direct macrofilaricidal action on B. pahangi.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579118","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

'Cebiche'– a potential source of human anisakiasis in Mexico? Cebiche"--墨西哥人肛吸虫病的潜在传染源？

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00700824

S.M. Laffon-Leal, V.M. Vidal-Martínez, G. Arjona-Torres

{"title":"'Cebiche'– a potential source of human anisakiasis in Mexico?","authors":"S.M. Laffon-Leal, V.M. Vidal-Martínez, G. Arjona-Torres","doi":"10.1017/s0022149x00700824","DOIUrl":"https://doi.org/10.1017/s0022149x00700824","url":null,"abstract":"Five fish species used for preparation of a popular dish (cebiche) made with raw fish flesh in Mexico were obtained from five localities of the coast of Yucatan. Lutjanus synagris, Gerres cinereus, Sphyraena barracuda, Epinephelus morio and Haemulon plumieriwere examined for the presence of larvae of anisakid nematodes, causative agents of human anisakiasis. The nematode Pseudoterranova sp. was found in E. morio and S. barracuda with a total prevalence of 83% and 6.5 ± 6.2 worms per fish for E. morio, and a prevalence of 33% and 10.2 ± 30.0 worms per fish forS. barracuda. Contracaecumsp. was found to infect G.cinereus with a prevalence of 57% and 7.6 ± 11.4 worms per fish. The relatively high prevalence of Pseudoterranova sp. indicates that this parasite is a potential causal agent of anisakiasis on the coast of Yucatan. Although all larvae were found only in the mesentery of the fish host, their importance as a potential source of human infection cannot be excluded as larval migration to the muscles in dead fish is possible.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140587358","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

Abomasal and small intestinal nematodes from captive gazelles in Spain 西班牙圈养瞪羚的瘤胃线虫和小肠线虫

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00701568

J. Ortiz, M.R. Ruiz de Ybáñez, M.M. Garijo, M. Goyena, G. Espeso, T. Abáigar, M. Cano

{"title":"Abomasal and small intestinal nematodes from captive gazelles in Spain","authors":"J. Ortiz, M.R. Ruiz de Ybáñez, M.M. Garijo, M. Goyena, G. Espeso, T. Abáigar, M. Cano","doi":"10.1017/s0022149x00701568","DOIUrl":"https://doi.org/10.1017/s0022149x00701568","url":null,"abstract":"The abomasal and small intestinal helminth fauna of three species of captive gazelles (Gazella dama mhorr, G. cuvieri and G. dorcas neglecta) kept in captivity in Almería (southeast Spain) have been studied, and the following species were identified: Nematodirus spathiger, N. filicollis, N. helvetianus, Camelostrongylus mentulatus, Trichostrongylus vitrinus, T. probolurus, T. colubriformis, Ostertagia ostertagi, O. harrisi, Teladorsagia (Ostertagia) circumcincta, and T. (Ostertagia) davtiani. Camelostrongylus mentulatus and N. spathiger were the most prevalent and abundant parasites. Ostertagia ostertagi, O. harrisi, N. helvetianus, and T. (Ostertagia) davtiani were identified for the first time in the genus Gazella. In addition, O. harrisi and Trichostrongylus probolurus are new records for Spain.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140579259","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

The use of zeolites as slow release anthelmintic carriers 使用沸石作为缓释驱虫药载体

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00700800

A. Dyer, S. Morgan, P. Wells, C. Williams

引用次数: 0

Epidemiology of Echinococcus granulosus in Arbil province, northern Iraq, 1990–1998 1990-1998 年伊拉克北部埃尔比勒省粒棘球蚴流行病学情况

IF 1.6 3区生物学

Journal of Helminthology Pub Date : 2024-04-12 DOI: 10.1017/s0022149x00700113

I. Saeed, C. Kapel, L.A. Saida, L. Willingham, P. Nansen

{"title":"Epidemiology of Echinococcus granulosus in Arbil province, northern Iraq, 1990–1998","authors":"I. Saeed, C. Kapel, L.A. Saida, L. Willingham, P. Nansen","doi":"10.1017/s0022149x00700113","DOIUrl":"https://doi.org/10.1017/s0022149x00700113","url":null,"abstract":"During the period 1990–1998, 99 cases of human cystic hydatidosis (12.4 cases per year) were surgically treated at the two main hospitals in Arbil province, northern Iraq, and from this the human occurence for the province was estimated to be 2 per 100,000 inhabitants. In the same area, 1270 sheep, 550 goats and 320 cattle were examined at slaughter for hydatid cysts and prevalence rates were found to be 15.0%, 6.2% and 10.9%, respectively. A decreasing tendency in livestock prevalences was found towards the end of the study period. As in humans, most of the hydatid cysts in livestock were located in the liver. Fertility of sheep cysts, i.e. those containing protoscoleces, was found to be significantly higher (64%) than that of goats (35.7%) and cattle (29.8%). The percentage of fertile cysts containing viable protoscoleces varied between 63 and 82% in the livers and between 72 and 79% in the lungs of the different animal species. A total of 97 stray dogs were examined post-mortem in the years 1991, 1992 and 1998, and Echinococcus granulosus worms were found in the intestines of 48 dogs (49.5%). High worm burdens (> 1000) were observed in 37% of the dogs, medium worm burdens (200–1000) in 41%, and low worm burdens (< 200) in 22%. In 1998, the prevalence of canine echinococcosis (24.3%) was found to be significantly lower than in 1991 (70.4%) and 1992 (60.6%). The prevalence of human hydatidosis did not differ significantly over the years, but the study confirmed that hydatidosis is endemic in northern Iraq, and that housewives, labourers and farmers appear to be at the greatest risk of infection.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140587458","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