Journal of Helminthology最新文献

{"title":"Multilocus, morphological, and ecological data reveal the presence of three new species of the genus <i>Neodiplostomum</i> Railliet 1919 (Digenea: Diplostomidae), endoparasites of birds from the Neotropical region of Mexico.","authors":"A L Sereno-Uribe, M T González-García, Y Aldama-Prieto, M P Ortega-Olivares, M García-Varela","doi":"10.1017/S0022149X26101849","DOIUrl":"https://doi.org/10.1017/S0022149X26101849","url":null,"abstract":"<p><p><i>Neodiplostomum</i> Railliet, 1919, is a cosmopolitan genus that parasitises mainly the intestines of birds of prey, and occasionally those of passerines, cuculiforms, and mammals. Adults of three undescribed species of <i>Neodiplostomum</i> were obtained from five bird species from three families (Accipitridae, Cuculidae, and Tyrannidae) in a single locality. Four molecular markers, namely, the small (SSU) and large (LSU) subunits and internal transcribed spacers (ITS1 and ITS2 plus 5.8S) from nuclear ribosomal DNA, and cytochrome c oxidase subunit 1 (<i>cox</i> 1) from mitochondrial DNA, were sequenced from specimens of the three species. The newly obtained sequences were aligned with other sequences of <i>Neodiplostomum</i> spp. downloaded from GenBank. Maximum likelihood and Bayesian analyses based on each molecular marker revealed that the specimens of the three undescribed species of <i>Neodiplostomum</i> formed three independent lineages with high values of genetic divergence; thus, they are recognised herein as three new species: <i>Neodiplostomum</i><i>acatlotlii</i> n. sp., <i>N.</i><i>papaloapanensis</i> n. sp., and <i>N.</i><i>leoni</i> n. sp. The new species showed morphometric differences in the body size, prosoma, opisthosoma, suckers, holdfast organ, testes, ovaries, and eggs. Our study also revealed that the three new species are distributed sympatrically in the Veracruzan biogeographical province in the Neotropical region of Mexico and use different ways of transmission to complete their life cycles.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e96"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990325","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":"Seroprevalence and risk factors of <i>Taenia solium</i> cysticercosis among persons with epilepsy in Southern Nigeria.","authors":"O A Sowemimo, T-W Chuang, P-C Cheng, B A Akeredolu, A A Adeleke, C-M Chou, M B Fawale, V P Gyang, B A Ezeala-Adikaibe, S C Igwe, O P Akinwale, T Nwafor, A D Omisore, M A Komolafe, C-K Fan","doi":"10.1017/S0022149X26101916","DOIUrl":"https://doi.org/10.1017/S0022149X26101916","url":null,"abstract":"<p><p>Cysticercosis, a zoonotic infection caused by the larval stage of <i>Taenia solium</i>, poses significant public health challenges in endemic regions. This community-based case-control study examined the seroprevalence, risk factors, and potential association between human cysticercosis and epilepsy in Southern Nigeria. Between September and December 2023, a door-to-door survey screened 23,027 residents across five communities using a validated 10-item questionnaire for epileptic seizures. Confirmed cases and age-matched community controls were tested for <i>T. solium</i> antibodies using enzyme-linked immunoelectrotransfer blot (EITB) and for taeniasis by stool microscopy. Of 79 participants tested serologically, the overall seroprevalence of cysticercosis was 12.7% (10/79), with no statistically significant difference between persons with epilepsy (PWE) (11.9%) and controls (13.5%) (<i>p</i> > 0.05). <i>Taenia</i> spp. eggs were detected by stool microscopy in 6.6% of PWE. Multivariable logistic regression identified increasing age (adjusted OR = 0.95; 95% CI: 0.92-0.98; <i>p</i> = 0.01) and consumption of frozen meat (adjusted OR = 0.23; 95% CI: 0.06-0.98; <i>p</i> = 0.04) as factors independently associated with lower odds of cysticercosis seropositivity. One case of neurocysticercosis (NCC) (2.4%) was confirmed among PWE. These findings suggest that, while <i>T. solium</i> transmission occurs in Southern Nigeria, cysticercosis is unlikely to be a principal aetiological driver of epilepsy in the studied communities. Strengthened food hygiene practices and larger population-based investigations are warranted to better inform public health control strategies.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e102"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990339","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":"Parasite communities of a rallid bird, Eurasian coot <i>Fulica atra</i> Linnaeus, 1758, in the Palaearctic.","authors":"S A Vlasenkov, V V Gorbach, S G Sokolov","doi":"10.1017/S0022149X2610220X","DOIUrl":"https://doi.org/10.1017/S0022149X2610220X","url":null,"abstract":"<p><p>Geographic distance is often recognized as a leading factor structuring the diversity of parasite communities. However, specific ecological and biogeographic mechanisms underlying the influence of this factor are not always evident. We used the material on the helminths of <i>Fulica atra</i> Linnaeus, 1758 (Rallidae) from seven areas in the Palaearctic to study geographic differentiation of the parasite communities at the level of both component communities and infracommunities. The analysis of spatial patterns of the parasite communities included (i) a reconnaissance study exploring the directions of variability of the communities using principal component analysis (PCA), and (ii) a careful disentanglement of the relationships identified in the reconnaissance study using metric scaling in Euclidean space. The component communities showed a clearer differentiation associated with geographic factors as compared to the infracommunities. The differences in the species composition of the parasite component communities of <i>F. atra.</i> increased consistently with increasing longitudinal distance between the localities, while the differences in prevalence increased with increasing latitudinal distance. The longitudinal trend of similarity decay of species composition of the component communities is probably determined by the directions of the seasonal migrations of <i>F. atra.</i>, which promote or prevent the exchange of parasite species between geographically isolated areas. The latitudinal gradient in the variability of the component communities in terms of prevalence may be associated with the latitudinal patterns in the temperature regime of the water bodies and their impact on the species composition and biomass of the food objects of <i>F. atra.</i></p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e106"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990315","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":"Recombinant antigen-based multiplex serology for the differential diagnosis of human cestodiases: toward integrated immunoprofiling.","authors":"C Sánchez-Ovejero, I Chaves-Coira, A Rey-Catena","doi":"10.1017/S0022149X26102120","DOIUrl":"https://doi.org/10.1017/S0022149X26102120","url":null,"abstract":"<p><p>The serological diagnosis of human cestodiases, particularly cystic echinococcosis (CE) and neurocysticercosis (NCC), is frequently constrained by cross-reactivity associated with crude parasite extracts, limiting its utility in differential diagnosis. This review evaluates the potential of recombinant antigen-based multiplex serology to improve the differentiation between CE and NCC. We examine key diagnostic targets, including the chimeric antigens DIPOL and 2B2t for CE, and T24H together with lentil lectin-adherent glycoproteins (LLGP) for NCC. We further discuss bead-based multiplex platforms that allow the simultaneous detection of antibodies against multiple antigens from a single, small-volume sample. Current evidence indicates that these approaches may reduce cross-reactivity and provide a more nuanced characterisation of pathogen-specific immune responses. Multiplex immunoprofiling represents a promising step toward more integrated serological strategies for the differential diagnosis of human cestodiases. However, further standardisation and validation across diverse epidemiological settings are required prior to routine clinical implementation.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e104"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990331","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":"Redescription of two <i>Allocreadium</i> species and molecular dating of the family Allocreadiidae (Trematoda: Gorgoderoidea).","authors":"K S Vainutis, A E Zhokhov, M Urabe, A Aydogdu","doi":"10.1017/S0022149X26102156","DOIUrl":"https://doi.org/10.1017/S0022149X26102156","url":null,"abstract":"<p><p>The family Allocreadiidae comprises diverse parasites of freshwater fishes, but their evolutionary timescale remains poorly understood. We provide a molecular dating analysis based on an expanded 28S rRNA dataset and redescriptions of two East Asian species, <i>Allocreadium hasu</i> and A. <i>pseudaspii</i>, with new morphological and genetic data. <i>Allocreadium hasu</i> from Lake Biwa (Japan) is genetically close to Far Eastern <i>A. khankaiense</i> and <i>A. anastasii</i> (0.09-0.97% divergence in 28S) but has not been recorded in the Russian Far East. <i>Allocreadium pseudaspii</i>, first recorded in the Bolshaya Ussurka River, possesses eyespot remnants and occupies a unique position among European species, suggesting secondary eastward dispersal. Phylogenetic analyses confirm family monophyly and resolve relationships among Palaearctic genera. Divergence time estimates indicate the most recent common ancestor of Allocreadiidae originated in East Asia during the Lower Cretaceous (~110 Ma). Diversification of major genera coincides with radiation of primary fish hosts: <i>Allocreadium</i> with Cypriniformes (~93 Ma), <i>Bunodera</i> with Perciformes (~75 Ma), and <i>Crepidostomum</i> s. str. with Nemacheilidae (~49 Ma). The basal genus <i>Acrolichanus</i>, parasitic on sturgeons, diverged earlier (40-80 Ma). The split between the Neotropical genus <i>Margotrema</i> and its Palaearctic relatives is estimated at ~6.5 Ma, consistent with closure of the Panama Isthmus. Our results provide a temporal framework for Allocreadiidae evolution, linking diversification to biogeographic history of freshwater fish hosts in East Asia and subsequent dispersal to North America via the Bering land bridge and to South America through the Panama Isthmus.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e99"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990304","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":"A new species and three known species of family Didymozoidae Monticelli, 1888 from marine fishes in Japan, with records of their morphological characteristics and DNA markers.","authors":"T Waki, M Nitta, K Kudawara, H Nakano, T Okawa","doi":"10.1017/S0022149X26101977","DOIUrl":"https://doi.org/10.1017/S0022149X26101977","url":null,"abstract":"<p><p>The Trematoda family Didymozoidae comprises over 250 species that typically use marine fishes as their definitive hosts. Species identification of adult didymozoids based solely on morphology is often problematic owing to the difficulty of observing their detailed internal organs. Although molecular analyses are generally essential for trematode taxonomy, reference sequences (e.g. 28S rDNA, ITS, and COI) for morphologically identified adult didymozoids remain scarce. In this study, adult didymozoids were collected from five marine fish species in Japan between 2018 and 2025. Morphological observations revealed four species, including <i>Annulocystis carnata</i> n. sp. from <i>Euthynnus affinis.</i> The new species is distinguished from the other members of the genus <i>Annulocystis</i> by its robust forebody, subglobular oral sucker, and oval testes. Three known species, <i>Annulocystis auxis</i> (from <i>Auxis thazard</i>), <i>Gonapodasmius squamatus</i> (from <i>Mola mola</i>), and <i>Nematobothrium filiforme</i> (from <i>Scomber</i> spp.), are redescribed and linked to novel molecular markers. The 28S rDNA sequence of <i>Annulocystis carnata</i> n. sp. was identical to that of a previously reported <i>Annulocystis</i> cf. <i>auxis</i> from Australia, suggesting that they are conspecific. Our molecular analyses revealed that some metacercariae reported from cnidarian jellyfishes in a past study were conspecific with <i>N. filiforme.</i> These results suggest the critical need for molecular markers in didymozoid identification. Our 28S rDNA-based phylogenetic analysis indicates that the currently accepted macrotaxonomy of the family may require revision for some genera and subfamilies.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e97"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990203","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":"Evaluation of anthelmintic efficacy of <i>Moringa oleifera</i> and <i>Embelia ribes</i> against <i>Haemonchus contortus</i>.","authors":"S Chaudhary, R Panda, H Ram, N Ashwathappa, D P Pateer, R Garg, N Dutta","doi":"10.1017/S0022149X26101941","DOIUrl":"https://doi.org/10.1017/S0022149X26101941","url":null,"abstract":"<p><p>In this study, the anthelmintic potential of the ethanolic and aqueous extracts of <i>Moringa oleifera</i> leaves and <i>Embelia ribes</i> seeds was evaluated against <i>Haemonchus contortus</i> by both <i>in vitro</i> (egg hatch assay, EHA; larval development assay, LDA; and adult mortality assay, AMA) and <i>in vivo</i> assays (faecal egg count reduction test, FECRT). Ethanolic extract of <i>M. oleifera</i> (MOEE) exhibited maximum inhibitory effects on egg hatching (87.77%) and larval development (86.97%) along with complete adult mortality (100% after 12 hours of incubation) @ 16.0 mg/mL and 32.0 mg/mL, respectively. However, ethanolic extract of <i>E. ribes</i> (EREE) @ 16.0 mg/mL concentration exhibited poor ovicidal (22.69%) but moderate larvicidal (77.90%) and adulticidal (80% mortality after 12 hours of incubation) effects. In EHA, MOEE showed a moderate IC₅₀ of 5.721 mg/mL, while EREE failed to achieve 50% inhibition at tested concentrations (1-32 mg/mL). For the LDA, both MOEE and EREE exhibited moderate IC₅₀ values of 4.131 mg/mL and 2.882 mg/mL, respectively. The aqueous extract of <i>M. oleifera</i> (MOAE) exhibited highest inhibitory effect on egg hatching (89.12%), larval development (89.94%), and also caused significant mortality (100%) of adult <i>H. contortus</i> in comparison to the standard drugs and other plant extracts evaluated in this study. In contrast, ERAE showed no significant effect on egg hatching or adult worm viability but notably inhibited larval development (86.97%). Both of the plant extracts contained phytochemicals like phenolic compounds, tannins, flavonoids, and alkaloids with anthelmintic properties. Further, <i>in vivo</i> trial using MOAE @ 150 mg/kg BW exhibited 72.42% FEC reduction on day 10 post-treatment as compared to fenbendazole (70.92%) and levamisole (89.01%) treated groups. The MOAE appeared effective in combating the resistant <i>H. contortus</i> worms. This study formed a base for further <i>in vivo</i> evaluation of anthelmintic efficacy of the mixture of <i>Moringa</i> and <i>Embelia</i> extracts and to standardise the optimum concentration and dose for its field applicability against GI parasitism in animals.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e98"},"PeriodicalIF":2.0,"publicationDate":"2026-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148990349","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":"Population structure and reproductive traits of <i>Octospiniferoides incognita</i> (Acanthocephala: Neoechinorhynchidae) in <i>Rhytiodus microlepis</i> (Characiformes: Anostomidae) across seasonal water level fluctuations in a Neotropical Lake.","authors":"L Vieira de Matos, D M Diniz Crispim, R A Caldeira Farias, M I Braga de Oliveira, J C de Oliveira Malta","doi":"10.1017/S0022149X26102181","DOIUrl":"https://doi.org/10.1017/S0022149X26102181","url":null,"abstract":"<p><p>This study investigated the population dynamics and reproductive biology of the acanthocephalan <i>Octospiniferoides incognita</i> in the intestine of the herbivorous fish <i>Rhytiodus microlepis</i> throughout the seasonal water level fluctuations of a floodplain lake in Amazonas State, Brazil. Between July 2022 and November 2023, hosts were sampled during the rising water, high water, receding water, and low water phases. The results show that the water level fluctuations significantly influence infection levels. Prevalence was 73% during rising water, reached 100% during high water, and remained high during receding water (89%), whereas no parasites were recorded during low water. Abundance and mean intensity were higher during high water and receding water. The population of <i>O. incognita</i> showed sexual dimorphism, with females attaining larger body sizes than males, and both sexes occurring preferentially in the middle portion of the intestine. Three reproductive morphotypes were recognized for each sex. Copulatory activity began during rising water, whereas the highest egg production was concentrated during high water and early receding water. Size at first sexual maturity (L50) was estimated at 0.12 cm, indicating an early maturation strategy. These findings clearly show that the infection dynamics and reproductive processes of <i>O. incognita</i> are closely synchronized with the flood pulse, which regulates host availability and promotes the success of trophic transmission in the Amazonian floodplain ecosystem.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e91"},"PeriodicalIF":2.0,"publicationDate":"2026-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148977035","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":"Helminth community of <i>Thrichomys laurentius</i> (Rodentia: Echimyidae) between two contrasting phytogeographic subunits of the Caatinga.","authors":"B O T Ferreira, N A Costa, T S Cardoso, C S Lucio, M M Santos, P S D'Andrea, A Maldonado Junior, R O Simões","doi":"10.1017/S0022149X26102053","DOIUrl":"https://doi.org/10.1017/S0022149X26102053","url":null,"abstract":"<p><p>The structuring of parasite communities in small mammals depends on both host-intrinsic factors and environmental conditions. We investigated the helminth fauna of the caviomorph rodent <i>Thrichomys laurentius</i>, comparing populations from two contrasting phytophysiognomies in the Caatinga biome: open shrubland in Carrasco area and seasonal deciduous forest in Mata Seca area. In this context, the influence of biotic predictors (host sex and host body weight) and abiotic predictors (phytogeographic subunit: Carrasco or Mata Seca) on parasite diversity (species richness, Shannon, and Simpson indices) was evaluated, as well as the effect of habitat type on the parasite community composition of this host species. Twenty-seven <i>T. laurentius</i> specimens (Carrasco: n = 15; Mata Seca: n = 12) were examined for helminths. A total of seven helminth species were recovered (<i>Heligmostrongylus almeidai</i>, <i>Paraheligmonella interrogans</i>, <i>Helminthoxys freitasi</i>, <i>Stilestrongylus freitasi</i>, <i>Stilestrongylus</i> sp., <i>Raillietina</i> sp., and <i>Aspidodera raillieti</i>). <i>Heligmostrongylus almeidai</i> was the dominant species in both phytophysiognomies, sharing dominance with <i>P. interrogans</i> in the Mata Seca. Overall helminth infection was significantly higher in Mata Seca (100%) compared with Carrasco (53%). The phytogeographic subunit was the strongest predictor for diversity indices, followed by host sex, which influenced parasite richness, and host body weight, which influenced Shannon and Simpson diversity indices. Although Mata Seca showed higher parasite abundance, species diversity was higher in Carrasco due to lower dominance. Local physiognomic variations in the Caatinga impose environmental filters that govern geohelminth success. Additionally, this study reports the first record of <i>Aspidodera raillieti</i> in <i>T. laurentius.</i></p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e95"},"PeriodicalIF":2.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148963308","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":"Host attributes and environmental factors affecting the prevalence and abundance of helminths in the broad-tailed bat <i>Nyctinomops laticaudatus</i>.","authors":"W I Moguel-Chin, A Suárez-Galaz, L Chan-González, E Reyes-Novelo, M C MacSwiney G, J A Panti-May","doi":"10.1017/S0022149X2610217X","DOIUrl":"https://doi.org/10.1017/S0022149X2610217X","url":null,"abstract":"<p><p>Studies of bat helminth communities are relatively rare compared with those of other vertebrate groups. Additionally, the relationships between host attributes and environmental factors and the presence and abundance of helminths in bats have seldom been examined. In this study, we evaluated how host traits and environmental conditions may influence the prevalence and abundance of helminths in two cave-dwelling populations of the broad-tailed bat <i>Nyctinomops laticaudatus</i> in the state of Yucatán, Mexico. From January 2024 to May 2025, specimens of <i>N. laticaudatus</i> were captured from Calcehtok and Homún and examined for helminths. The helminth fauna recorded in <i>N. laticaudatus</i> consisted of 17 taxa, seven of which exhibited a prevalence higher than 10% and were analysed using generalised linear models and generalised linear mixed models: <i>Brachylecithum rileyi</i>, <i>Limatulum nanum</i>, <i>Ochoterenatrema</i> sp., <i>Urotrema</i> spp., <i>Vampirolepis</i> spp., <i>Aonchotheca pulchra</i>, and <i>Anoplostrongylus allami.</i> Prevalence and abundance were associated with the host traits and environmental factors analysed. Females had a higher probability of infection with helminths such as <i>B. rileyi.</i> Prevalence tended to differ between juveniles and adults for <i>Urotrema</i> spp. Non-reproductive bats and individuals from Calcehtok exhibited higher prevalences of parasites such as <i>Vampirolepis</i> spp. and <i>L. nanum</i>, respectively. <i>Ochoterenatrema</i> sp. and <i>Vampirolepis</i> spp. exhibited lower prevalence and abundance during months with reduced rainfall and higher temperatures, respectively. This study provides new information on the helminths associated with molossid bats and highlights the influence of host attributes and environmental conditions on helminth community structure.</p>","PeriodicalId":15928,"journal":{"name":"Journal of Helminthology","volume":"100 ","pages":"e93"},"PeriodicalIF":2.0,"publicationDate":"2026-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148963380","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}