{"title":"Linalyl acetate against larvae of <i>Haemonchus</i> spp. and <i>Trichostrongylus</i> spp. that affects ruminants: considerations about the hormetic effect.","authors":"V P Garbin, U Y Yoshitani, M B Molento","doi":"10.1017/S0022149X24000488","DOIUrl":"https://doi.org/10.1017/S0022149X24000488","url":null,"abstract":"<p><p>Active components from plants are an alternative therapy to parasite control, addressing the widespread multidrug resistance populations. Linalyl acetate (LA), an ester abundantly found in plants of the genus <i>Lavandula</i>, was tested in vitro against third-stage larvae (L3) of <i>Haemonchus</i> spp. and <i>Trichostrongylus</i> spp. using the larval migration test at 0.89, 2.24, 4.47, 8.95, 17.9, 35.8, 71.6, and 143.2 mg/ml. After an initial incubation of 18 h, the total content of each tube was transferred to a 24-well plate that allowed active L3 to migrate through a nylon mesh (second incubation). Although LA exhibited 100% efficacy in reducing larval migration at 8.95 and 17.9 mg/ml, it showed reduced activity (5%) at 143.2 mg/ml. The data revealed a hormetic biphasic response characterised by an inverted U-shaped concentration-response curve. While hormesis has been previously documented in insecticidal and allelopathic contexts, this study reports the occurrence of hormesis induced by a phytochemical component against two species of nematodes for the first time. This distinctive stimulation-and-inhibition effect should be considered when selecting new compounds for preclinical testing.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501948","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}
D Sá Lemes, B E de Andrade Silva, A Maldonado, R V Vilela, J L Luque, R de Oliveira Simões
{"title":"New species of the genus <i>Alippistrongylus</i> (Nematoda: Trichostrongylina) parasitic in <i>Delomys dorsalis</i> (Rodentia: Sigmodontinae) in the Atlantic Forest of Rio de Janeiro, Brazil.","authors":"D Sá Lemes, B E de Andrade Silva, A Maldonado, R V Vilela, J L Luque, R de Oliveira Simões","doi":"10.1017/S0022149X24000464","DOIUrl":"https://doi.org/10.1017/S0022149X24000464","url":null,"abstract":"<p><p>We describe a new species of the genus <i>Alippistrongylus</i> (Nematoda: Trichostrongylina) in the small intestine of <i>Delomys dorsalis</i> (Rodentia: Sigmodontinae) found in Itatiaia National Park (Parque Nacional do Itatiaia, PNI), state of Rio de Janeiro, Brazil. The new species can be distinguished between the other two species previously described by the following morphological characteristics: pattern of the rays from the caudal bursa rays in males and the spherical-shaped appendage in the female. Additionally, we provide molecular genetic data from the new species. The discovery of <i>Alippistrongylus itatiaiaensis</i> sp. n. expands our understanding of nematode diversity and underscores the importance of parasite studies in biodiversity conservation. Its occurrence in a preserved area like the PNI emphasises the role of such habitats in maintaining unique ecological interactions.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501977","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}
{"title":"The expression of sICAM-1 influenced by <i>Clonorchis sinensis</i> co-infection in CHB patients.","authors":"J Qiu, M Shang, W Li, H Zhang, Y Liao, H Dong","doi":"10.1017/S0022149X24000427","DOIUrl":"https://doi.org/10.1017/S0022149X24000427","url":null,"abstract":"<p><p>Soluble Intercellular Adhesion Molecule-1 (sICAM-1) has emerged as an inflammatory biomarker of many essential functions. We investigated the level of sICAM-1 influenced by <i>Clonorchis sinensis</i> (<i>C. sinensis</i>) co-infection in chronic hepatitis B (CHB) patients to explore the degree of liver tissue inflammation and liver function damage after co-infection. The study included data from patients with <i>C. sinensis</i> mono-infection (n=27), hepatitis B virus (HBV) mono-infection (n=32), <i>C. sinensis</i> and HBV co-infection (n=24), post-hepatitis B liver cirrhosis (n=18), post-hepatitis B liver cirrhosis co-infected with <i>C. sinensis</i> (n=16), and healthy controls (n=39). The level of sICAM-1 was measured with specific enzyme-linked immunosorbent assay method. Compared to the healthy control group, all the experimental groups had significantly higher serum sICAM-1 levels. The levels of sICAM-1 in co-infected groups were significantly higher compared to the mono-infection groups and were positively correlated with the levels of glutamate aminotransferase (ALT) and aspartate aminotransferase (AST). Our research findings confirmed that co-infection could exacerbate liver tissue inflammation and liver function damage in patients, could raise the sICAM-1 level, and may lead to the chronicity of HBV infection. These results provide clues for pathological mechanism study and formulating treatment plans.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142501978","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}
P. Agniwo, B.A.E.S. Savassi, J. Boissier, M. Dolo, M. Ibikounlé, A. Dabo
{"title":"Mapping of schistosome hybrids of the haematobium group in West and Central Africa","authors":"P. Agniwo, B.A.E.S. Savassi, J. Boissier, M. Dolo, M. Ibikounlé, A. Dabo","doi":"10.1017/s0022149x24000257","DOIUrl":"https://doi.org/10.1017/s0022149x24000257","url":null,"abstract":"Hybridization of parasitic species is an emerging health problem in the evolutionary profile of infectious disease, particularly within trematodes of the genus <jats:italic>Schistosoma.</jats:italic> Because the consequences of this hybridization are still relatively unknown, further studies are needed to clarify the epidemiology of the disease and the biology of hybrid schistosomes. In this article, we provide a detailed review of published results on schistosome hybrids of the <jats:italic>haematobium</jats:italic> group. Using a mapping approach, this review describes studies that have investigated hybridization in human (<jats:italic>S. haematobium, S. guineensis</jats:italic>, and <jats:italic>S. intercalatum</jats:italic>) and animal (<jats:italic>S. bovis</jats:italic> and <jats:italic>S. curassoni</jats:italic>) schistosome species in West Africa (Niger, Mali, Senegal, Côte d’Ivoire, Benin, Nigeria) and in Central Africa (Cameroon, Gabon, Democratic Republic of Congo), as well as their limitations linked to the underestimation of their distribution in Africa. This review provides information on studies that have highlighted hybrid species of the <jats:italic>haematobium</jats:italic> group and the regions where they have been found, notably in West and Central Africa.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253239","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}
{"title":"Description and pathology of a new genus and species of fish blood fluke (Digenea: Aporocotylidae Odhner, 1912) infecting white mullet, Mugil curema Valenciennes, 1836 (Mugiliformes: Mugilidae) in Mobile Bay (northern Gulf of Mexico) with a phylogenetic analysis","authors":"M.B. Warren, S.P. Ksepka, T.N. Truong, S.S. Curran, H.R. Dutton, S.A. Bullard","doi":"10.1017/s0022149x24000312","DOIUrl":"https://doi.org/10.1017/s0022149x24000312","url":null,"abstract":"Three fish blood flukes (Aporocotylidae Odhner, 1912) infect mullets (Mugiliformes: Mugilidae): <jats:italic>Cardicola mugilis</jats:italic> Yamaguti, 1970 and <jats:italic>Plethorchis acanthus</jats:italic> Martin, 1975 infect striped mullet, <jats:italic>Mugil cephalus</jats:italic> Linnaeus, 1758 in the Central Pacific Ocean (Hawaiian Islands) and Brisbane River (Australia), respectively; <jats:italic>Cardicola brasiliensis</jats:italic> Knoff & Amato, 1992 infects Lebranche mullet, <jats:italic>Mugil liza</jats:italic> Valenciennes, 1836 from the Southwestern Atlantic Ocean (Brazil). White mullets were cast-netted from the mouth of Deer River, a coastal saltmarsh of Mobile Bay, in the north-central Gulf of Mexico and examined for blood fluke infections. Specimens of <jats:italic>Mugilitrema labowskiae</jats:italic> Warren & Bullard n. gen., n. sp. were found infecting the endocardial surface and inter-trabecular spaces of the atrium, ventricle, and bulbous arteriosus. The new genus and species differ from all other aporocotylids by having the combination of two post-caecal testes, a uterus with straight ascending and descending portions, and a common genital pore. The 28S analysis recovered the new species and <jats:italic>P.</jats:italic><jats:italic>acanthus</jats:italic> as sister taxa and Aporocotylidae as monophyletic. Carditis associated with intense infections comprised endocardial hyperplasia, resulting in a thickened cardiac endothelium. Probable dead or deteriorating eggs in the myocardium were encapsulated by granulomas composed of epithelioid histiocytes. Live eggs infected the afferent artery of gill filaments and were associated with varied hyperplasia of the overlying epithelium and haemorrhaging from the afferent artery in high-intensity infections. The new species is the first aporocotylid infecting a mullet from the northwestern Atlantic Ocean and only the second description of demonstrable endocarditis attributed to an adult fish blood fluke infection.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253244","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}
R. Euclydes, F.T. de Vasconcelos Melo, H.C. da Justa, R.F. Jesus, L.H. Gremski, S.S. Veiga, K.M. Campião
{"title":"A new species of lungworm from the Atlantic Forest: Rhabdias megacephala n. sp. parasite of the endemic anuran Proceratophrys boiei","authors":"R. Euclydes, F.T. de Vasconcelos Melo, H.C. da Justa, R.F. Jesus, L.H. Gremski, S.S. Veiga, K.M. Campião","doi":"10.1017/s0022149x24000385","DOIUrl":"https://doi.org/10.1017/s0022149x24000385","url":null,"abstract":"<jats:italic>Rhabdias</jats:italic> are lung-dwelling parasites of anurans and some reptiles. Currently, 93 species are known to exist worldwide. The identification of <jats:italic>Rhabdias</jats:italic> species is based mainly on morphological traits of hermaphroditic females that generally have a very conserved morphology. However, different approaches, such as the combination of morphological, molecular, and ecological data, have provided advances in identifying and delimiting rhabdiasid species. Here, we describe a new species of <jats:italic>Rhabdias</jats:italic> from the south of Brazil, with morphological and molecular data. The new species is distinguished from its congeners by having an elongated body, evident cephalic dilation, larger buccal capsule, and large esophagus. In addition to morphological characteristics, we observed significant genetic divergence among the cytochrome oxidase subunit I (COI) sequence of the new species and the closest available sequence, <jats:italic>Rhabdias fuelleborni</jats:italic> (10.24%–10.87%). Furthermore, phylogenetic reconstructions based on the COI gene indicated that the new species represents a different lineage, constituting an outgroup of the species complexes <jats:italic>Rhabdias</jats:italic> cf. <jats:italic>stenocephala</jats:italic> and <jats:italic>Rhabdias fuelleborni</jats:italic> with <jats:italic>Rhabdias</jats:italic> sp. 4. Thus, <jats:italic>Rhabdias megacephala</jats:italic> is the 24th nominal species of the Neotropical region, the 14th Brazilian, and the fourth species described from south of Brazil.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253278","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}
A. Faltýnková, K. O’Dwyer, C. Pantoja, D. Jouet, K. Skírnisson, O. Kudlai
{"title":"Trematode species diversity in the faucet snail, Bithynia tentaculata at the western edge of its native distribution, in Ireland","authors":"A. Faltýnková, K. O’Dwyer, C. Pantoja, D. Jouet, K. Skírnisson, O. Kudlai","doi":"10.1017/s0022149x24000397","DOIUrl":"https://doi.org/10.1017/s0022149x24000397","url":null,"abstract":"Trematodes and their snail hosts have developed intimate parasite-host associations, with snails supporting a diverse and often species-specific trematode fauna. In the faucet snail, <jats:italic>Bithynia tentaculata</jats:italic> (Caenogastropoda, Littorinimorpha), a unique trematode fauna has been recorded recently. However, knowledge of the exact species identity, phylogenetic relationships, and geographical distribution remains limited as many of the species belong to groups with unclear or controversial taxonomical assignment. To contribute to our knowledge of the trematodes, we investigated the trematode fauna of <jats:italic>B. tentaculata</jats:italic> by examining a total of 556 snails from lakes in County Galway, Ireland. Using an integrative taxonomic approach including DNA sequence data analyses (28S rRNA gene, ITS1-5.8S-ITS2, ITS2, <jats:italic>cox</jats:italic>1, <jats:italic>nad</jats:italic>1) and morphological tools (taxonomical drawings and measurements), we identified nine trematode species of seven families, with seven species occurring as cercariae (<jats:italic>Cyathocotyle prussica</jats:italic>, <jats:italic>Lecithodendrium linstowi</jats:italic>, <jats:italic>Lecithodendrium</jats:italic> sp., <jats:italic>Asymphylodora progenetica</jats:italic>, <jats:italic>Sphaerostoma bramae</jats:italic>, <jats:italic>Metorchis xanthosomus</jats:italic>, and <jats:italic>Notocotylus</jats:italic> sp.) and three species occurring as metacercariae (<jats:italic>A. progenetica</jats:italic>, <jats:italic>Parasymphylodora parasquamosa</jats:italic>, and <jats:italic>Sphaeridiotrema</jats:italic> sp.). Except for <jats:italic>S. bramae</jats:italic>, all are new species records for Ireland and provide the most western distribution of these trematodes in Europe. The trematode species recorded are known to use a wide range of definitive hosts and have a wide geographical distribution; among them are species members of genera that are zoonotic (<jats:italic>Metorchis</jats:italic>) and pathogenic to wildlife (<jats:italic>Cyathocotyle</jats:italic>, <jats:italic>Sphaeridiotrema</jats:italic>, and <jats:italic>Notocotylus</jats:italic>). There remains an ongoing need for precise identification of the trematode species to ensure that wider ecological contexts are correctly understood and biodiversity and disease threats can be accurately evaluated.","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253276","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}
Juan Nicolás Caraballo, Andrés Ulibarrie, Monika Hamann, Ricardo Guerrero, Vanesa Arzamendia, Cynthya Elizabeth González
{"title":"Metazoan endoparasites of snakes from Argentina: Review and checklist with distributional notes and remarks.","authors":"Juan Nicolás Caraballo, Andrés Ulibarrie, Monika Hamann, Ricardo Guerrero, Vanesa Arzamendia, Cynthya Elizabeth González","doi":"10.1017/S0022149X24000130","DOIUrl":"https://doi.org/10.1017/S0022149X24000130","url":null,"abstract":"<p><p>This article presents a checklist of metazoan parasites of snakes from Argentina, along with a comprehensive review of the relevant literature published between 1922 and June 2023, covering various aspects of interest. We compiled 34 species of metazoan endoparasites from 28 studies. The subclass Digenea showed the highest number of species (n = 22 species), followed by the phylum Nematoda (n = 8 species), and the subclass Pentastomida (n = 3 species and 1 <i>taxa inquirenda</i>). Dipsadidae was the family of snakes with the most species examined for metazoan endoparasites (n = 20 species). In contrast, Viperidae had the largest number of specimens surveyed (n = 343). Of 23 provinces, 15 (65.2%) presented at least one report of metazoan endoparasites in snakes. The northeastern provinces showed the highest richness of metazoan endoparasites and host diversity. Many articles focused on taxonomy, but studies on parasite ecology were not found. Although taxonomic accuracy was high in most reports, some records were correctly deposited in zoological collections or geo-referenced. This is the first attempt to include all groups of metazoan endoparasites of snakes from Argentina in a single checklist in the last century.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142073031","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}
{"title":"An automated faecal egg count system for detection of <i>Ascaridia galli</i> ova in chickens.","authors":"J L Cain, D Wilson, P Slusarewicz","doi":"10.1017/S0022149X24000373","DOIUrl":"https://doi.org/10.1017/S0022149X24000373","url":null,"abstract":"<p><p>Chicken production has increased over the past decade, resulting in a concomitant rise in the demand for more humane options for poultry products including cage-free, free-range, and organic meat and eggs. These husbandry changes, however, have come hand-in-hand with increased prevalence of <i>Ascaridia galli</i> infection, which can cause clinical disease in chickens as well as the occasional appearance of worms in eggs. Additionally, development of anthelmintic resistance in closely related helminths of turkeys highlights the need for closely monitored anthelmintic treatment programs. Manual faecal egg counts (FECs) can be time-consuming and require specialist training. As such, this study sought to validate an automated FEC system for use in detection and quantification of <i>A. galli</i> eggs in chicken faeces. Automated counts using the Parasight System (PS) were compared to traditional manual McMaster counting for both precision and correlation between methods. Overall, ten repeated counts were performed on twenty individual samples for a total of 200 counts performed for each method. A strong, statistically significant correlation was found between methods (R<sup>2</sup> = 0.7879, <i>P</i> < 0.0001), and PS counted more eggs and performed with statistically significant higher precision (<i>P</i> = 0.0391) than manual McMaster counting. This study suggests that PS is a good alternative method for performing <i>A. galli</i> FECs and provides a new tool for use in helminth treatment and control programs in chicken operations.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142073030","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}
P Oyarzún-Ruiz, R Thomas, A Santodomingo, M Zamorano-Uribe, M Moroni, L Moreno, S Muñoz-Leal, V Flores, S Brant
{"title":"Systematics and life cycles of four avian schistosomatids from Southern Cone of South America.","authors":"P Oyarzún-Ruiz, R Thomas, A Santodomingo, M Zamorano-Uribe, M Moroni, L Moreno, S Muñoz-Leal, V Flores, S Brant","doi":"10.1017/S0022149X2400035X","DOIUrl":"https://doi.org/10.1017/S0022149X2400035X","url":null,"abstract":"<p><p>Relative to the numerous studies focused on mammalian schistosomes, fewer include avian schistosomatids particularly in the southern hemisphere. This is changing and current research emerging from the Neotropics shows a remarkable diversity of endemic taxa. To contribute to this effort, nine ducks (<i>Spatula cyanoptera</i>, <i>S.</i><i>versicolor</i>, <i>Netta peposaca</i>), 12 swans (<i>Cygnus melancoryphus</i>) and 1,400 <i>Physa</i> spp. snails from Chile and Argentina were collected for adults and larval schistosomatids, respectively. Isolated schistosomatids were preserved for morphological and molecular analyses (<i>28S</i> and <i>COI</i> genes). Four different schistosomatid taxa were retrieved from birds: <i>Trichobilharzia</i> sp. in <i>N. peposaca</i> and <i>S. cyanoptera</i> that formed a clade; <i>S.</i><i>cyanoptera</i> and <i>S. versicolor</i> hosted <i>Trichobilharzia querquedulae</i>; <i>Cygnus melancoryphus</i> hosted the nasal schistosomatid, <i>Nasusbilharzia melancorhypha</i>; and one visceral, Schistosomatidae gen. sp., which formed a clade with furcocercariae from Argentina and Chile from previous work. Of the physid snails, only one from Argentina had schistosomatid furcocercariae that based on molecular analyses grouped with <i>T. querquedulae.</i> This study represents the first description of adult schistosomatids from Chile as well as the elucidation of the life cycles of <i>N.</i><i>melancorhypha</i> and <i>T. querquedulae</i> in Chile and Neotropics, respectively. Without well-preserved adults, the putative new genus Schistosomatidae gen. sp. could not be described, but its life cycle involves <i>Chilina</i> spp. and <i>C. melancoryphus.</i> Scanning electron microscopy of <i>T. querquedulae</i> revealed additional, undescribed morphological traits, highlighting its diagnostic importance. Authors stress the need for additional surveys of avian schistosomatids from the Neotropics to better understand their evolutionary history.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141200004","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}