Journal of Parasitology最新文献

{"title":"FIRST RECORD OF PHYLLOBOTHRIID METACESTODES IN CHIMAERA MONSTROSA (HOLOCEPHALI) AND ONCORHYNCHUS GORBUSCHA (SALMONIDAE): NOVEL INSIGHT INTO LARVAL TOPOGRAPHY AND ULTRASTRUCTURE.","authors":"Larisa G Poddubnaya, Roman Kuchta, Tomáš Scholz","doi":"10.1645/24-136","DOIUrl":"10.1645/24-136","url":null,"abstract":"<p><p>Scanning electron microscopy was used to study the scolex morphology of 3 morphotypes of metacestodes of the order Phyllobothriidea (Cestoda) from the spiral intestine of the North Sea rabbitfish Chimaera monstrosa and the intestine and gall bladder of the pink salmon Oncorhynchus gorbuscha. Transmission electron microscopy allowed a detailed examination of the ultrastructure of the tegument, unicellular gland cells, muscle cells, and calcareous corpuscles of metacestodes of different sizes from chimaeras. Based on our morphological data, we propose that the studied intestinal metacestodes from chimaeras and pink salmon belong to the type XV metacestodes of Jensen and Bullard, possibly related to members of the genus Clistobothrium Dailey and Vogelbein, 1990.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 4","pages":"419-430"},"PeriodicalIF":1.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144637350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A NOVEL HENNEGUYA (MYXOSPOREA) FROM THE GILLS OF GREEN SUNFISH, LEPOMIS CYANELLUS (CENTRARCHIFORMES: CENTRARCHIDAE), FROM THE BLACK RIVER (WHITE RIVER DRAINAGE) OF ARKANSAS.","authors":"Chris T McAllister, Donald G Cloutman, Eric M Leis, Alvin C Camus, Henry W Robison","doi":"10.1645/24-82","DOIUrl":"10.1645/24-82","url":null,"abstract":"<p><p>A new species of genus Henneguya Thélohan, 1892 (Bivalvulida: Myxobolidae) is described from the gills of 2 of 7 (29%) green sunfish, Lepomis cyanellus (Rafinesque) from Coffee Creek of the Black River, White River drainage, Arkansas. Henneguya rafinesquei n. sp. differs from the only other species of Henneguya reported from centrarchids, Henneguya episcleraMinchew and Sleight, 1977, from Lepomis gibbosus (L.), and from Lepomis macrochirus Rafinesque by having a smaller myxospore total length (34.9 [31.3-37.1 μm] vs. 62.6 [49-81] μm). The body and polar capsules of H. rafinesquei n. sp. are pyriform, whereas the body of H. episclera is obovate to elliptical and the polar capsules are elliptoid with a narrow neck. Henneguya rafinesquei n. sp. is genetically most similar to Myxobolus branchiarumKsepka, Rash, and Bullard, 2022 from smallmouth bass, Micropterus dolomieu Lacépède, and Myxobolus lepomisRosser, Baumgartner, Barger, and Griffin, 2017 from dollar sunfish, Lepomis marginatus (Holbrook), but is easily distinguished morphologically by possessing 2 elongate caudal processes that are lacking in the latter 2 species. Phylogenetic analysis of the 1,963-base-pair small-subunit ribosomal ribonucleic acid gene placed H. rafinesquei n. sp. in a clade among other myxozoans that primarily infect centrarchids and comprises only the second species of Henneguya reported from any member of the sunfish family. Although the precise site of development within lamellae could not be determined histologically, a plasmodium with associated epithelial hyperplasia and mild lymphocytic inflammation produced a nodular lesion that displaced adjacent lamellae, altering normal gill morphology.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 4","pages":"496-502"},"PeriodicalIF":1.1,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144698878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"AMPHIBIAN PARASITES EXHIBIT IDIOSYNCRATIC RELATIONSHIPS WITH SPATIOTEMPORAL ENVIRONMENTAL AND HOST-COMMUNITY VARIATION.","authors":"Kyle D Gustafson, Vasyl V Tkach, Robert A Newman","doi":"10.1645/24-63","DOIUrl":"https://doi.org/10.1645/24-63","url":null,"abstract":"<p><p>Why parasites occur in certain hosts in certain locations has been a long-standing question among ecological and evolutionary parasitologists. Encounter and compatibility filters summarize the likelihood that a host and parasite will physically interact and establish an infection upon contact. Encounter and compatibility filters are not fixed and, among multiple locations, the abiotic environmental characteristics and biotic community composition that contribute to the filters often vary spatially and temporally. Abiotic variation may directly affect hosts or parasites-particularly parasites with 1 or more free-living stages-whereas the local biotic community may dilute or amplify parasite transmission. Unlike directly transmitted parasites, complex-life cycle parasites use multiple hosts, thus having life cycles that, we hypothesize, are highly susceptible to the effects of spatiotemporal environmental variation. We modeled infection probability relationships of endohelminths from post-metamorphic wood frogs (Rana [Lithobates] sylvatica) and northern leopard frogs (Rana pipiens) with wetland characteristics, landscape composition, and the anuran species within the local community. Parasites included complex-life cycle trematodes that use amphibians as definitive hosts (Haematoloechus spp., Glypthelmins quieta) or as intermediate hosts (Alaria sp., Neodiplostomum sp., echinostomatids, and Lechriorchis) and nematodes with direct or indirect life cycles (Cosmocercoides and Oswaldocruzia). Although our results demonstrate that distributions of parasites with complex and direct life cycles are correlated with some abiotic and biotic characteristics of the environment, there were few general trends. Each parasite's distribution had its own unique relationship with wetland, landscape, and amphibian-community variables, and there was overall low predictability for most species. One landscape feature-the number of wetlands within the vicinity of the site of amphibian capture-was commonly included in top models for leopard frogs and could be associated with how definitive hosts (e.g., amphibians, mammals, and birds) and intermediate hosts (e.g., snails and odonates) use the landscape. The amphibian community at any given site also commonly affected infection probabilities, such that the local presence of other species tended to reduce infection probabilities in sampled frogs, lending support to the dilution effect at the landscape level. Our research highlights the need to consider spatiotemporal sampling, environmental variation, and host-community variation when studying parasite prevalence in any given component community.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"262-275"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144127965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"NEW SPECIES OF AXINE ABILDGAARD, 1794 (MONOGENOIDEA: AXINIDAE) INFECTING GILL LAMELLAE OF ATLANTIC FLYINGFISH, CHEILOPOGON MELANURUS (VALENCIENNES) (EXOCOETIDAE) IN THE WESTERN ATLANTIC OCEAN WITH PHYLOGENETIC ANALYSIS AND COMMENTS ON THE FEMALE GENITALIA OF AXINE SPP.","authors":"John H Brule, Micah B Warren, William B Driggers, Stephen A Bullard","doi":"10.1645/24-145","DOIUrl":"https://doi.org/10.1645/24-145","url":null,"abstract":"<p><p>We collected specimens of Axine trickyvagina Brule and Bullard n. sp. (Monogenoidea: Axinidae) from the gill lamellae of Atlantic flyingfish, Cheilopogon melanurus (Valenciennes) (Exocoetidae) in the north-central Gulf of America. Specimens of the new species were heat-killed and formalin-fixed for morphology, and others were preserved in 95% EtOH for DNA extraction and sequencing of the 28S gene and ITS1 region. The new species differs from all congeners by the combination of having a long haptor (∼40-50% of the total body length), a male copulatory organ with 10-15 spines, and a genital atrium having bilateral spinous patches each with 18-25 spines. Our study of specimens of the new species, type and voucher specimens representing 8 congeners, and all published accounts of all congeners revealed that the terminal female genitalia of Axine spp. comprises 2 ducts (a multi-chambered vagina that lacks a sclerite plus an accessory duct with a sclerotized nozzle comprising its opening) that open into a common female genital atrium. Descriptions of Axine spp. published from 1794 through 2023 failed to recognize the vaginal duct and accessory duct as distinct components and unanimously misinterpreted the accessory duct's sclerotized nozzle as a \"vaginal spine.\" The phylogenetic analysis inferred from 28S rDNA sequences placed our sequence in a clade of other Mazocraeidea spp. and sister to a nonugen sequence ascribed to Axine japonicaPrice, 1946 (GenBank LC799038). We recovered Axinidae as sister to Heteromicrocotylidae, Heteraxinidae, and Microcotylidae. The present study is the first published description of an axinid from a flyingfish in the western Atlantic Ocean.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"276-286"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144150741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ADULT THORNY-HEADED WORM (ACANTHOCEPHALA) PARASITES OF NORTH AMERICAN HERPETOFAUNA: CHECKLIST OF SPECIES AND IDENTIFICATION KEY TO FAMILIES AND GENERA.","authors":"Manuel de Luna, Luis A Olivera, Diane P Barton, Roberto García-Barrios","doi":"10.1645/24-30","DOIUrl":"https://doi.org/10.1645/24-30","url":null,"abstract":"<p><p>An updated checklist of adult thorny-headed worms (Acanthocephala) that parasitize wild North American amphibians and reptiles is presented: A total of 21 species grouped in 4 genera, 4 families, 2 orders, and 2 classes are registered; these infect a total of 19 species of reptiles and 17 species of amphibians in the region. An illustrated identification key for the families and genera listed is proposed.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"250-261"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144127963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"TWO NEW SPECIES OF HENNEGUYA THÉLOHAN, 1892 (CNIDARIA: BIVALVULIDA: MYXOBOLIDAE) INFECTING GILL OF BLUE CATFISH, ICTALURUS FURCATUS (RAFINESQUE) (SILURIFORMES: ICTALURIDAE) FROM THE TALLAPOOSA RIVER AND CHESAPEAKE BAY TRIBUTARIES.","authors":"Steven P Ksepka, Heather Walsh, Christine L Densmore, Triet N Truong, Stephen A Bullard","doi":"10.1645/24-141","DOIUrl":"https://doi.org/10.1645/24-141","url":null,"abstract":"<p><p>We herein describe 2 new species of Henneguya Thélohan, 1892 (Bivalvulida: Myxobolidae), Henneguya auburnensis Ksepka and Bullard n. sp. and Henneguya chesapeakensis Ksepka, Walsh, and Bullard n. sp., infecting the inter-lamellar epithelium of cultured blue catfish (Ictalurus furcatus [Valenciennes, 1840] [Siluriformes: Ictaluridae]) from Saugahatchee Creek (Tallapoosa River; Auburn, Alabama) and the inter-lamellar epithelium of invasive blue catfish captured in Chesapeake Bay tributaries, respectively. Henneguya auburnensis resembles Henneguya mississippiensisRosser, Griffin, Quiniou, Khoo, Greenway, Wise, and Pote, 2015, and Henneguya sutherlandiGriffin, Pote, Wise, Greenway, Mauel, and Camus, 2008, which both infect channel catfish (Ictalurus punctatus [Rafinesque, 1818] [Siluriformes: Ictaluridae]) in Mississippi, but differs from these species by having more polar tubule coils (10-12 vs. 8-9 and 6, respectively). Henneguya chesapeakensis resembles Henneguya longicaudaMinchew, 1977, which infects channel catfish in Mississippi, but differs from this species by having shorter polar capsules (6.0-7.0 vs. 7.0-9.0). A phylogenetic analysis of the small subunit (SSU) rDNA recovered ictalurid-infecting Henneguya spp. as monophyletic, with H. auburnensis sister to a clade of Henneguya spp. that, except for H. chesapeakensis, infect the gill or adipose fin of channel catfish. Henneguya chesapeakensis was recovered sister to Henneguya ictaluriPote, Hanson, and Shivaji, 2000. Histological sections of infected gill filaments revealed that the plasmodia of both new species developed within the inter-lamellar epithelium. The new species comprise the second and third species of Henneguya reported from blue catfish.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"287-297"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144216153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INTEGRATING MOLECULAR AND MORPHOLOGICAL METHODS FOR GREGARINE SPECIES DELIMITATION: A REVISION AND PHYLOGENY OF THE BLABERICOLIDAE WITH RECOGNITION OF NEW SPECIES OF BLABERICOLA AND PROTOMAGALHAENSIA INFECTING BLAPTICA DUBIA, THE GUYANA SPOTTED COCKROACH (BLATTODEA: BLABERIDAE).","authors":"Richard E Clopton, Debra T Clopton","doi":"10.1645/25-4","DOIUrl":"https://doi.org/10.1645/25-4","url":null,"abstract":"<p><p>Integrated morphological and molecular methods were used to reexamine, revise, and expand the gregarine species that are known members of the Blabericolidae infecting blaberid cockroaches of the subfamilies Blaberinae and Oxyhaloinae. Here, Protomagalhaensia serpicula n. sp. and Blabericola blaberae n. comb. are described from the Guyana spotted cockroach Blaptica dubia, and 3 new synonymies are recognized: Blabericola cubensis (=Blabericola princisi = Gregarina princisi) parasitizing Blaberus discoidalis and Blaberus boliviensis; Protomagalhaensia granulosae (=Protomagalhaensia vipera) parasitizing B. discoidalis and Eublaberus posticus; and Protomagalhaensia wolfi (=Protomagalhaensia richardsoni) parasitizing Nauphoeta cinerea and Henschoutedenia flexivitta. One new combination also is recognized, Blabericola cerastes n. comb. (=Protomagalhaensia cerastes) parasitizing Phoetalia pallida. This study revealed that gregarine species delimitation errors can be avoided by integrating morphological and molecular methods with multiple conspecifics as a reference framework. This approach is preferred for delimiting gregarine species. Blabericolidae and its component genera, Blabericola and Protomagalhaensia, are monophyletic groups with a likely Pangean origin whose members speciated as New World and Old World groups following the breakup of Gondwana. Patterns of speciation appear to be largely vicariant, but host switching through human introduction of pest host species may also have played a role in gregarine radiation. The gross alimentary anatomy of B. dubia is described, and the effects of gamont morphology and phylogeny on patterns of site specificity are discussed.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"233-249"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144004813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MOLECULAR SURVEY OF HAEMOSPORIDIAN PARASITES IN HAWKS, FALCONS, AND OWLS (ACCIPITRIFORMES, FALCONIFORMES, STRIGIFORMES) FROM MINNESOTA AND NORTH DAKOTA, WITH REMARKS ON THE PHYLOGENETIC RELATIONSHIPS OF HAEMOSPORIDIANS IN NORTH AMERICAN RAPTORS.","authors":"Jeffrey A Bell, Timothy G Driscoll, Tyler J Achatz, Jakson R Martens, Jefferson A Vaughan","doi":"10.1645/25-16","DOIUrl":"https://doi.org/10.1645/25-16","url":null,"abstract":"<p><p>Avian haemosporidians are a diverse group of apicomplexan parasites that are globally distributed and infect almost all avian orders. Haemosporidian surveys of raptors (birds of prey) are underrepresented compared to those of songbirds, perhaps because of the greater difficulty in capturing and handling raptors. In this study, we captured raptors over a 7-yr period from northeastern North Dakota and northwestern Minnesota. Using standard molecular methods, we successfully screened 595 individuals representing 5 species of hawks (Accipitriformes), 3 species of falcons (Falconiformes), and 7 species of owls (Strigiformes). The overall infection prevalence averaged 41.5%, ranging from 31.6% in falcons (n = 38) to 85.7% in owls (n = 14). Thirty-one (12.6%) of the 247 infected raptors were infected concurrently with 2 or more haemosporidian genera. Leucocytozoon was the most common parasite genus identified. A total of 27 haemosporidian lineages were identified composed of 8 Leucocytozoon, 6 Parahaemoproteus, and 13 Plasmodium lineages. Twelve lineages (44%) were novel lineages identified for the first time. Raptor host order showed a significant phylogenetic signal within the tree topology of haemosporidian lineages from North American raptors. A significant effect of host order was also identified in the phylogenetic reconstructions of Haemoproteus, Leucocytozoon, and Parahaemoproteus lineages, with large clades restricted to mostly Accipitriformes and Strigiformes. Similar host specificity was not evident within the Plasmodium phylogeny, with most lineages infecting multiple raptor host orders and some lineages not restricted to raptors. Our results demonstrate that raptors support a unique and diverse community of haemosporidian parasites, many of which are distinct to raptor species. Studying haemosporidians within raptors expands our knowledge of host-parasite evolutionary relationships, species diversity, and cryptic speciation within this ubiquitous group of parasites.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"299-314"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144266462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE BROAD FISH TAPEWORMS DIBOTHRIOCEPHALUS SPP., THE SEALWORM PHOCANEMA CATTANI, AND OTHER ENDOHELMINTH PARASITES IN THE RETURNING NONNATIVE CHINOOK SALMON, ONCORHYNCHUS TSHAWYTSCHA, IN THE VALDIVIA RIVER BASIN, CHILE.","authors":"Patricio Torres, Hélène Yera, Alonso Rubilar, Célia Rouges, Victor Leyán, Ricardo Silva","doi":"10.1645/24-71","DOIUrl":"10.1645/24-71","url":null,"abstract":"<p><p>In the present study, we examined nonnative returning Chinook salmon caught between 2018 and 2023 in the Valdivia River basin, Chile, for endohelminth parasites. Zoonotic endohelminths were identified by morphological and molecular methods, based on a multiplex PCR or PCR and sequencing targeting the cytochrome c oxidase gene of diphyllobothriids or Ascaridoidea mitochondrial DNA. A total of 5,350 larvae of helminths were detected in the salmon, with 3.6% corresponding to the cestodes Dibothriocephalus latus and Dibothriocephalus dendriticus, with freshwater life cycles, and 96% to \"Scolex pleuronectis,\" 0.2% to Hepatoxylon trichiuri, 0.1% to Nybelinia sp., and 0.1% to the nematode Phocanema cattani, all with a marine life cycle. All salmon had plerocercoids of Dibothriocephalus spp., with the highest percentage in the peritoneum and intestine. Only D. latus was identified in the muscles of 40% of salmon, with up to 7 larvae per host and a mean density of 0.1 larvae per 200 g. The present results indicate that most (63.6%) of the plerocercoids of Dibothriocephalus spp. can survive during the migration of Chinook salmon to the ocean and their return to freshwater. The sealworm P. cattani was found for the first time in Chinook salmon with a prevalence of 20% in the muscles. \"Scolex pleuronectis\" was abundant in the intestine and pyloric caeca, representing 96% of the identified endohelminths. One-third of the salmon had H. trichiuri in the body cavity, and Nybelinia sp. in the intestine wall. Plerocercoids of Dibothriocephalus spp. were mostly encapsulated and a few free in different organs. Histologically, the free larvae of Dibothriocephalus spp. were associated with an infiltrate of mononuclear and polymorphonuclear cells suggesting damage to their tegument. Larvae of Nybelinia sp. in the muscular layer of the intestine were surrounded by a thin capsule to which they were attached by the tegument; mononuclear and polymorphonuclear cells were observed outside the capsule and in some areas in contact with the larva. Plerocercoids of D. latus and Nybelinia sp. were associated with abundant mast cells in the intestinal wall. The presence of the zoonotic Dibothriocephalus spp. and P. cattani in returning salmon would increase their potential risk of transmission to the human population in the Valdivia River basin area. Similarly, salmon carcasses could facilitate the potential transmission of Dibothriocephalus spp. and P. cattani to wild and domestic mammals and wild birds.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"210-226"},"PeriodicalIF":1.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144015310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OCCURRENCE OF TRICHINELLA SPIRALIS ANTIBODIES IN SWINE BACKYARD FARMS IN VERACRUZ, MEXICO.","authors":"José Luis Bravo-Ramos, María Guadalupe Sánchez-Otero, Sokani Sánchez-Montes, Gerardo Gabriel Ballados-González, Luis Arturo Ortiz-Carbajal, Leonardo Avendaño Vela","doi":"10.1645/25-3","DOIUrl":"https://doi.org/10.1645/25-3","url":null,"abstract":"<p><p>Trichinosis is a parasitic disease caused by Trichinella spiralis that affects pigs, rodents, and some wild animals. Poor sanitation facilitates the spread of disease in swine, posing a risk to public health. In Mexico, pig farming ranks third in meat production and operates at 3 primary levels: industrial, semi-industrial, and backyard farming. In Mexico, backyard pig farming is a common practice primarily because it provides a source of meat at minimal or no cost. However, these pigs can act as reservoirs, sustaining the parasite's life cycle and potentially introducing it into domestic environments. Although human and pig infections with T. spiralis have been documented in Mexico, data on its prevalence and distribution remain inconsistent. For this reason, this study aimed to investigate the occurrence of antibodies against T. spiralis in backyard pigs from Veracruz, Mexico. Blood samples were collected from 472 backyard pigs and examined using an enzyme-linked immunosorbent assay. A detailed questionnaire (farm management, origin of animals, type of production, type of feed, presence of rodents, evidence of wildlife and domestic animals, exposure to pig carcasses and carcasses of other animals) was designed to gather information about potential exposures. The seroprevalence for T. spiralis was 1.6%; however, antibodies were only found in 4 localities and distributed in 4 municipalities. Proper pig management practices are crucial for controlling intestinal parasites in animals. This study advocates for public health education and promoting good pig farming practices.</p>","PeriodicalId":16659,"journal":{"name":"Journal of Parasitology","volume":"111 3","pages":"206-209"},"PeriodicalIF":1.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144014941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}