Parasitology最新文献_第3页

Serpentirhabdias orientalis sp. nov. (nematoda: rhabdiasidae), a new lungworm species in naja kaouthia from Thailand: the first record of the genus from the oriental region and an elapid snake.

IF 2.1 3区医学

Parasitology Pub Date : 2025-02-17 DOI: 10.1017/S0031182025000174

Vachirapong Charoennitiwat, Supakit Tongpon, Phatthariya Suksuwan, Kittipong Chaisiri, Panithi Laoungbua, Tanapong Tawan, Urusa Thaenkham, Napat Ratnarathorn

引用次数: 0

First report of Echinococcus canadensis (G7) in backyard pigs from the western highlands of Guatemala.

IF 2.1 3区医学

Parasitology Pub Date : 2025-02-14 DOI: 10.1017/S0031182025000150

Roderico Hernández-Chea, Américo Yoel Aragón-Méndez, Alejandro Hun, Paola Morales-Ramíre, Ilde Silva, Federico Villatoro, Marion Wassermann

引用次数: 0

Initial stage of crusted scabies and possible diagnostic characteristics: A case series.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-28 DOI: 10.1017/S0031182025000113

Wanchen Li, Lin Song, Tao Guo, Yaliu Wu, Xiaoli Li, Hongfeng Li, Jianjun Li, Simiao Li

{"title":"Initial stage of crusted scabies and possible diagnostic characteristics: A case series.","authors":"Wanchen Li, Lin Song, Tao Guo, Yaliu Wu, Xiaoli Li, Hongfeng Li, Jianjun Li, Simiao Li","doi":"10.1017/S0031182025000113","DOIUrl":"10.1017/S0031182025000113","url":null,"abstract":"Scabies is a neglected tropical disease caused by the ectoparasitic mite, Sarcoptes scabiei var. hominis (S. scabiei). Common scabies, the most prevalent clinical subtype of scabies, is characterized by pruritus, multiple skin lesions and low mite burden. In contrast, crusted scabies, an extremely contagious variant, is characterized by hyperkeratosis and high mite burden, with or without pruritus. Scabies can be diagnosed based on clinical manifestations, with confirmation obtained through microscopic identification of diagnostic features of S. scabiei. However, owing to the diversity and non-specific nature of its clinical manifestations and insufficient knowledge regarding early-stage clinical manifestations, the diagnosis of crusted scabies continues to be delayed. Herein, we present three cases of scabies with varying degrees of crusting and mite burden. Three patients with physical and microscopic results suggesting scabies were selected for this study. Case 1 had mild crusting and low mite burden, case 2 had severe crusting and high mite burden and case 3 had mild crusting and high mite burden. In this case report, 'the initial stage of crusted scabies' refers to the progression from common to crusted scabies. The discussion regarding the diagnostic characteristics of the initial stage of crusted scabies is expected to aid the early diagnosis of crusted scabies.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-6"},"PeriodicalIF":2.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143053173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phylogeography of Pennella (Copepoda: Siphonostomatoida: Pennellidae) indicates interoceanic dispersal mediated by cetacean and fish hosts.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-28 DOI: 10.1017/S0031182025000101

Sofía Ten, Rachel Vanessa Pool, Juan Antonio Raga, Andrew D Sweet, Francisco Javier Aznar

{"title":"Phylogeography of Pennella (Copepoda: Siphonostomatoida: Pennellidae) indicates interoceanic dispersal mediated by cetacean and fish hosts.","authors":"Sofía Ten, Rachel Vanessa Pool, Juan Antonio Raga, Andrew D Sweet, Francisco Javier Aznar","doi":"10.1017/S0031182025000101","DOIUrl":"10.1017/S0031182025000101","url":null,"abstract":"Copepods of the genus Pennella parasitize a wide range of marine animals, including cetaceans, teleosts, and cephalopods worldwide. Their taxonomy is unclear, as there is incongruence between morphological and genetic data and incomplete species coverage. This study provides new morphological and genetic (COI) data from 23 specimens of Pennella cf. filosa (syn. P. balaenoptera) from western Mediterranean whales and a swordfish. First, their position in the phylogeny of Pennella was assessed and species delimitation revisited using all available Pennella COI sequences (n = 189), obtained from Mediterranean and north Pacific specimens from 18 host species (including multiple cetaceans and teleosts). Second, it was investigated whether the geographic location, degree of host vagility, or host taxonomic identity help explain genetic differentiation. Five distinct haplotype groups with varying genetic divergence were distinguished. Although the presence of sibling species cannot be ruled out, species delimitation methods could not find interspecific genetic differences, leaving the taxonomy of the genus unresolved. The observed genetic differentiation could not be attributed to geography or host type. This suggests that members of the genus Pennella show low specificity for definitive hosts and interoceanic dispersal mediated by some vagile definitive hosts. The use of more genetic markers for addressing these questions in the future is encouraged.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-10"},"PeriodicalIF":2.1,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143053176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Helminth parasites of Galápagos mammals: a new cestode of the genus Raillietina from the endemic rice rat Nesoryzomys swarthi and a summary of parasites from both endemic and invasive rodents.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-27 DOI: 10.1017/S0031182025000083

Scott L Gardner, Emma K Chesley, Michael C Friedle, Altangerel T Dursahinhan

{"title":"Helminth parasites of Galápagos mammals: a new cestode of the genus Raillietina from the endemic rice rat Nesoryzomys swarthi and a summary of parasites from both endemic and invasive rodents.","authors":"Scott L Gardner, Emma K Chesley, Michael C Friedle, Altangerel T Dursahinhan","doi":"10.1017/S0031182025000083","DOIUrl":"10.1017/S0031182025000083","url":null,"abstract":"In this first report of endoparasites from endemic land-mammals of the Galápagos Islands, we describe a new species of cestode of the genus Raillietina (Cyclophyllidea: Davaineidae) from a species of Nesoryzomys and summarize the extent of helminth parasitism in both oryzomyine endemics and introduced species of Rattus. Up to the current time, no helminth parasites have been reported from rodents of the Galápagos, and little work has yet been done describing and synthesizing Galápagos parasite diversity. In historical times, several species of autochthonous rodents have occupied the islands including: Nesoryzomys narboroughi Heller 1904, N. fernandinae Hutterer and Hirsch 1979, N. swarthi Orr, 1938, and Aegialomys galapagoensis (Waterhouse, 1839). Colonization of the islands by humans brought 3 known species of synanthropic rodents: Rattus rattus, R. norvegicus, and Mus musculus which are suspected to have caused the extinction of at least 3 other oryzomyines in historical times.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-16"},"PeriodicalIF":2.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Factors influencing a common but neglected blood parasite prevalence in breeding populations of passerines.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-27 DOI: 10.1017/S0031182025000095

Ashwin Kumar Saravana Bhavan Venkatachalam, Anna Kadlecová, Anna Kapustová, Magdalena Kulich Fialová, Jana Brzoňová, Miroslav Šálek, Milena Svobodová

{"title":"Factors influencing a common but neglected blood parasite prevalence in breeding populations of passerines.","authors":"Ashwin Kumar Saravana Bhavan Venkatachalam, Anna Kadlecová, Anna Kapustová, Magdalena Kulich Fialová, Jana Brzoňová, Miroslav Šálek, Milena Svobodová","doi":"10.1017/S0031182025000095","DOIUrl":"10.1017/S0031182025000095","url":null,"abstract":"The occurrence of avian blood protists is affected by multiple factors that include the characteristics of the hosts, the vectors, the parasites, as well as the environmental factors. This study provides an insight into some of the factors that influence the prevalence of avian Lankesterella, neglected but common blood parasites in breeding populations of common passerines. The highest prevalences of Lankesterella infection were observed in 1 great tit (Parus major) population at 63%, 1 blue tit (Cyanistes caeruleus) population at 49% and a sedge warbler (Acrocephalus schoenobaenus) population at 33%. Prevalence was found to be significantly influenced by sampling site followed by host age, species and sex. Julian date had no significant effect on Lankesterella prevalence. Prevalence data from different sampling sites can reveal different patterns and should be combined critically. Higher prevalence in adults suggest that the infections are chronic, which helps the parasite to persist in host populations. The differences between sexes might be related to different exposure to the transmitting vectors (e. g., mites or mosquitoes) during breeding.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-7"},"PeriodicalIF":2.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling the host range of Plasmodium huffi: morphological, histopathological and molecular characterization in red-legged seriemas from Brazil.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-27 DOI: 10.1017/S003118202500006X

Lis Marques de Carvalho E Vieira, Sabrina Epiphanio, Natália Coelho Couto de Azevedo Fernandes, Juliana Mariotti Guerra, José Luiz Catão Dias, Maria Andreína Pacheco, Ananias A Escalante, Érika Martins Braga

{"title":"Unraveling the host range of Plasmodium huffi: morphological, histopathological and molecular characterization in red-legged seriemas from Brazil.","authors":"Lis Marques de Carvalho E Vieira, Sabrina Epiphanio, Natália Coelho Couto de Azevedo Fernandes, Juliana Mariotti Guerra, José Luiz Catão Dias, Maria Andreína Pacheco, Ananias A Escalante, Érika Martins Braga","doi":"10.1017/S003118202500006X","DOIUrl":"10.1017/S003118202500006X","url":null,"abstract":"Avian Plasmodium parasites can be pathogenic to their vertebrate hosts. Although cases of anaemia are frequently reported in parasitized birds, the potential damage caused by the parasite during the exoerythrocytic reproduction phase remains poorly investigated. Here, we report 2 individuals of red-legged seriemas (Cariama cristata) infected with 2 different lineages of Plasmodium huffi, one of them exhibiting potential malarial-compatible tissue lesions in the spleen, liver, brain and lungs, alongside molecular confirmation of parasite presence in the spleen. Previously classified as specific to birds from the order Piciformes, this parasite has shown different associated lineages amplified across diverse host orders in South America (Anseriformes, Charadriiformes, Columbiformes, Galliformes, Pelecaniformes and Passeriformes). Those infections, however, were defined as abortive due to the absence of gametocytes visualized in blood smear slides. Herein, we confirm P. huffi as a generalist parasite based on the first morphological characterization in the peripheral blood of a bird outside the Piciformes order. This is also the first morphological and molecular description of a Plasmodium species in Cariamiformes. In addition to the morphological analyses, we have also proposed a novel phylogenetic hypothesis based on the partial cytb gene and the near-complete mitochondrial genome of this parasite. Our findings support that the division of the genus Plasmodium into subgenera is not monophyletic, as P. (Huffia) huffi and its associated lineages cluster more closely with Plasmodium (Haemamoeba) gallinaceum than with Plasmodium (Huffia) elongatum.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-16"},"PeriodicalIF":2.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pinus sylvestris bark extract reduces the impact of Heligmosomoides bakeri infection on C57BL/6 but not on BALB/c mice (Mus musculus).

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-27 DOI: 10.1017/S0031182024001148

Berit Marie Blomstrand, Stig Milan Thamsborg, Håvard Steinshamn, Heidi Larsen Enemark, Inga Marie Aasen, Karl-Christian Mahnert, Kristin Marie Sørheim, Francesca Shepherd, Jos Houdijk, Spiridoula Athanasiadou

{"title":"Pinus sylvestris bark extract reduces the impact of Heligmosomoides bakeri infection on C57BL/6 but not on BALB/c mice (Mus musculus).","authors":"Berit Marie Blomstrand, Stig Milan Thamsborg, Håvard Steinshamn, Heidi Larsen Enemark, Inga Marie Aasen, Karl-Christian Mahnert, Kristin Marie Sørheim, Francesca Shepherd, Jos Houdijk, Spiridoula Athanasiadou","doi":"10.1017/S0031182024001148","DOIUrl":"https://doi.org/10.1017/S0031182024001148","url":null,"abstract":"Plant secondary metabolites (PSMs) may improve gastrointestinal health by exerting immunomodulatory, anti-inflammatory and/or antiparasitic effects. Bark extracts from coniferous tree species have previously been shown to reduce the burden of a range of parasite species in the gastrointestinal tract, with condensed tannins as the potential active compounds. In the present study, the impact of an acetone extract of pine bark (Pinus sylvestris) on the resistance, performance and tolerance of genetically diverse mice (Mus musculus) was assessed. Mice able to clear an infection quickly (fast responders, BALB/c) or slowly (slow responders, C57BL/6) were infected orally with 200 infective third-stage larvae (L3) of the parasitic nematode Heligmosomoides bakeri or remained uninfected (dosed with water only). Each infection group of mice was gavaged for 3 consecutive days from day 19 post-infection with either bark extract or dimethyl sulphoxide (5%) as vehicle control. Oral administration of pine bark extract did not have an impact on any of the measured parasitological parameter. It did, however, have a positive impact on the performance of infected, slow-responder mice, through an increase in body weight (BW) and carcase weight and reduced feed intake by BW ratio. Importantly, bark extract administration had a negative impact on the fast responders, by reducing their ability to mediate the impact of parasitism through reducing their performance and tolerance. The results indicate that the impact of PSMs on parasitized hosts is affected by host's genetic susceptibility, with susceptible hosts benefiting more from bark extract administration compared to resistant ones.","PeriodicalId":19967,"journal":{"name":"Parasitology","volume":" ","pages":"1-9"},"PeriodicalIF":2.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143047557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Size, spines, and primes: the drivers of collar spine numbers among echinostome trematodes.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-27 DOI: 10.1017/S0031182025000046

Bronwen Presswell, Priscila M Salloum, Jerusha Bennett, Katherine E Buschang, Robert Poulin

引用次数: 0

How patient, infection, and cysticercus characteristics impact the evolution of Taenia solium larva in the human brain: a unique cyst-level analysis.

IF 2.1 3区医学

Parasitology Pub Date : 2025-01-24 DOI: 10.1017/S003118202400163X

Hongbin Zhang, Meghana G Shamsunder, Pryanka Bawa, Arturo Carpio, W Allen Hauser, Karina Quinde-Herrera, Alex Jaramillo, Elizabeth A Kelvin

引用次数: 0