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Guerreiro Martins NB, Robles MDR, Knoff M, Navone GT, Callejón R. Rodentolepis microstoma isolated from different species of Sigmodontinae rodents (Rodentia: Cricetidae) in the Cuenca del Plata, Argentina: Morphological aspects and molecular characterization. Int J Parasitol Parasites Wildl 2022; 19:56-67. [PMID: 36043155 PMCID: PMC9420344 DOI: 10.1016/j.ijppaw.2022.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 07/08/2022] [Accepted: 07/09/2022] [Indexed: 11/28/2022]
Abstract
The purpose of this paper was to study specimens of the genus Rodentolepis isolated from eight species of Sigmodontinae rodents (Rodentia: Cricetidae) from six provinces in the Cuenca del Plata, Argentina, based on morphological, morphometric and molecular characteristics (ITS1 rDNA and cox1 mtDNA). The genetic distances among studied specimens and other Hymenolepididae from rodents available in the GenBank were analyzed and phylogenetic inferences were provided. A total of 955 specimens of Sigmodontinae rodents were examined from seven localities of six provinces in the Cuenca del Plata region in Argentina. Tapeworms were removed from the rodents’ small intestines. Conventional studies were used for the morphological and molecular analysis. Specimens of R. microstoma were identified. An amended diagnosis and detailed morphological description of this species is provided. The molecular analyses showed that the specimens studied form the same clade as that of R. microstoma previously studied from other hosts and regions. The genetic polymorphisms of R. microstoma observed corresponded to different groups of species hosts and regions. Moreover, eight species of sigmodontine rodents and 33 localities from the Cuenca del Plata region in Argentina constitute new host and geographical records. This study shows the importance of using integrative taxonomic approaches that combine morphological and molecular characters to understand biological diversity. Moreover, the discovery of R. microstoma in humans suggests the importance of further studies on this zoonotic cestode. This study provides important data on the taxonomy and distribution of R. microstoma to advance knowledge of the transmission dynamics of this parasite. Rodentolepis microstoma is recorded parasitizing Sigmodontinae rodents in Argentina. Morphological variations are observed in R. microstoma between host species and areas. Amended diagnosis of Rodentolepis microstoma is provided. Phylogenetic inferences of Hymenolepididae from rodents are proposed.
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Affiliation(s)
- Natalia Beatriz Guerreiro Martins
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Bv 120 e/ 60 y 64, (1900). CCT- CONICET- La Plata, Universidad Nacional de La Plata, Buenos Aires, Argentina
- Corresponding author.
| | - María del Rosario Robles
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Bv 120 e/ 60 y 64, (1900). CCT- CONICET- La Plata, Universidad Nacional de La Plata, Buenos Aires, Argentina
| | - Marcelo Knoff
- Laboratório de Helmintos Parasitos de Vertebrados, Instituto Oswaldo Cruz, Fiocruz, Avenida Brasil, 4365, Manguinhos, Rio de Janeiro, Brazil
| | - Graciela Teresa Navone
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Bv 120 e/ 60 y 64, (1900). CCT- CONICET- La Plata, Universidad Nacional de La Plata, Buenos Aires, Argentina
| | - Rocío Callejón
- Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain
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Gliga DS, Pisanu B, Walzer C, Desvars-Larrive A. Helminths of urban rats in developed countries: a systematic review to identify research gaps. Parasitol Res 2020; 119:2383-2397. [PMID: 32607706 PMCID: PMC7366588 DOI: 10.1007/s00436-020-06776-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Accepted: 06/17/2020] [Indexed: 12/15/2022]
Abstract
Although black (Rattus rattus) and brown (Rattus norvegicus) rats are among the most widespread synanthropic wild rodents, there is a surprising scarcity of knowledge about their ecology in the urban ecosystem. In particular, relatively few studies have investigated their helminth species diversity in such habitat. We followed the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) guideline to synthesize the existing published literature regarding the helminth fauna of urban rats in developed countries (North America, Europe, Australia, New Zealand and Japan). We aimed at describing the species diversity and richness of urban rat helminths, the species prevalence and associations, the methods of investigation, the pathological changes observed in the hosts, the risk factors of infection and the public health significance of rat-borne helminthiases. Twenty-three scientific papers published between 1946 and 2019 were reviewed, half of them were conducted in Europe. Twenty-five helminth species and eight genera were described from the liver, digestive tract, lungs and muscles of urban rats. The most commonly reported parasite was Calodium hepaticum. Prevalence and risk factors of helminth infection in urban rats varied greatly between studies. Observed pathological findings in the rat host were generally minor, except for C. hepaticum. Several rat helminths can parasitize humans and are therefore of public health significance. The lack of references to identification keys and the rare use of molecular tools for species confirmation represent the main limitation of these studies. Knowledge gap on this topic and the needs for future research are discussed.
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Affiliation(s)
- Diana S Gliga
- Conservation Medicine, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria
| | - Benoît Pisanu
- Unité Mixte de Services (UMS) 2006 Patrimoine Naturel, Office Français pour la Biodiversité (OFB), Muséum National d'Histoire Naturelle (MNHN), Paris, France
| | - Chris Walzer
- Conservation Medicine, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria
- Health Program, Wildlife Conservation Society, Bronx, NY, USA
| | - Amélie Desvars-Larrive
- Conservation Medicine, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria.
- Unit of Veterinary Public Health and Epidemiology, Institute of Food Safety, Food Technology and Veterinary Public Health, University of Veterinary Medicine, Vienna, Austria.
- Complexity Science Hub, Vienna, Austria.
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Riebold D, Russow K, Schlegel M, Wollny T, Thiel J, Freise J, Hüppop O, Eccard JA, Plenge-Bönig A, Loebermann M, Ulrich RG, Klammt S, Mettenleiter TC, Reisinger EC. Occurrence of Gastrointestinal Parasites in Small Mammals from Germany. Vector Borne Zoonotic Dis 2019; 20:125-133. [PMID: 31513468 DOI: 10.1089/vbz.2019.2457] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
An increase in zoonotic infections in humans in recent years has led to a high level of public interest. However, the extent of infestation of free-living small mammals with pathogens and especially parasites is not well understood. This pilot study was carried out within the framework of the "Rodent-borne pathogens" network to identify zoonotic parasites in small mammals in Germany. From 2008 to 2009, 111 small mammals of 8 rodent and 5 insectivore species were collected. Feces and intestine samples from every mammal were examined microscopically for the presence of intestinal parasites by using Telemann concentration for worm eggs, Kinyoun staining for coccidia, and Heidenhain staining for other protozoa. Adult helminths were additionally stained with carmine acid for species determination. Eleven different helminth species, five coccidians, and three other protozoa species were detected. Simultaneous infection of one host by different helminths was common. Hymenolepis spp. (20.7%) were the most common zoonotic helminths in the investigated hosts. Coccidia, including Eimeria spp. (30.6%), Cryptosporidium spp. (17.1%), and Sarcocystis spp. (17.1%), were present in 40.5% of the feces samples of small mammals. Protozoa, such as Giardia spp. and amoebae, were rarely detected, most likely because of the repeated freeze-thawing of the samples during preparation. The zoonotic pathogens detected in this pilot study may be potentially transmitted to humans by drinking water, smear infection, and airborne transmission.
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Affiliation(s)
- Diana Riebold
- Division of Tropical Medicine and Infectious Diseases, Department of Medicine, University of Rostock, Rostock, Germany.,Host Septomics Research Group, ZIK Septomics, University Jena Medical School, Jena, Germany
| | - Kati Russow
- Division of Tropical Medicine and Infectious Diseases, Department of Medicine, University of Rostock, Rostock, Germany
| | - Mathias Schlegel
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Theres Wollny
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany.,Faculty of Natural Sciences, Lausitz University of Applied Sciences, Senftenberg, Germany
| | - Jörg Thiel
- Forstliches Forschungs- und Kompetenzzentrum Gotha, Gotha, Germany
| | - Jona Freise
- Department of Pest Control, Veterinary Task-Force, Lower Saxony State Office for Consumer Protection and Food Safety (LAVES), Wardenburg, Germany
| | - Ommo Hüppop
- Institute of Avian Research "Vogelwarte Helgoland," Wilhelmshaven, Germany
| | - Jana Anja Eccard
- Animal Ecology, Institute for Biochemistry and Biology, University Potsdam, Potsdam, Germany
| | - Anita Plenge-Bönig
- Division of Hygiene and Infectious Diseases, Institute of Hygiene and Environment, Hamburg, Germany
| | - Micha Loebermann
- Division of Tropical Medicine and Infectious Diseases, Department of Medicine, University of Rostock, Rostock, Germany
| | - Rainer Günter Ulrich
- Institute of Novel and Emerging Infectious Diseases, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Sebastian Klammt
- Division of Tropical Medicine and Infectious Diseases, Department of Medicine, University of Rostock, Rostock, Germany
| | | | - Emil Christian Reisinger
- Division of Tropical Medicine and Infectious Diseases, Department of Medicine, University of Rostock, Rostock, Germany
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Abdel-Gaber R, Fouad D, Ataya F, Morsy K, Maher S. Morphological identification and molecular characterization of 18S rDNA of two hemiurid trematodes (Lecithocladium cristatum Rudolphi, 1819 and Lecithocladium parviovum Yamaguti, 1953) infecting the greater lizardfish Saurida tumbil (Pisces: Synodontidae) inhabiting the Red Sea. Gene X 2019; 683:243-252. [DOI: 10.1016/j.gene.2018.10.041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 10/11/2018] [Accepted: 10/15/2018] [Indexed: 10/28/2022] Open
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Desvars-Larrive A, Pascal M, Gasqui P, Cosson JF, Benoît E, Lattard V, Crespin L, Lorvelec O, Pisanu B, Teynié A, Vayssier-Taussat M, Bonnet S, Marianneau P, Lacôte S, Bourhy P, Berny P, Pavio N, Le Poder S, Gilot-Fromont E, Jourdain E, Hammed A, Fourel I, Chikh F, Vourc’h G. Population genetics, community of parasites, and resistance to rodenticides in an urban brown rat (Rattus norvegicus) population. PLoS One 2017; 12:e0184015. [PMID: 28886097 PMCID: PMC5590879 DOI: 10.1371/journal.pone.0184015] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 08/16/2017] [Indexed: 11/18/2022] Open
Abstract
Brown rats are one of the most widespread urban species worldwide. Despite the nuisances they induce and their potential role as a zoonotic reservoir, knowledge on urban rat populations remains scarce. The main purpose of this study was to characterize an urban brown rat population from Chanteraines park (Hauts-de-Seine, France), with regards to haematology, population genetics, immunogenic diversity, resistance to anticoagulant rodenticides, and community of parasites. Haematological parameters were measured. Population genetics was investigated using 13 unlinked microsatellite loci. Immunogenic diversity was assessed for Mhc-Drb. Frequency of the Y139F mutation (conferring resistance to rodenticides) and two linked microsatellites were studied, concurrently with the presence of anticoagulant residues in the liver. Combination of microscopy and molecular methods were used to investigate the occurrence of 25 parasites. Statistical approaches were used to explore multiple parasite relationships and model parasite occurrence. Eighty-six rats were caught. The first haematological data for a wild urban R. norvegicus population was reported. Genetic results suggested high genetic diversity and connectivity between Chanteraines rats and surrounding population(s). We found a high prevalence (55.8%) of the mutation Y139F and presence of rodenticide residues in 47.7% of the sampled individuals. The parasite species richness was high (16). Seven potential zoonotic pathogens were identified, together with a surprisingly high diversity of Leptospira species (4). Chanteraines rat population is not closed, allowing gene flow and making eradication programs challenging, particularly because rodenticide resistance is highly prevalent. Parasitological results showed that co-infection is more a rule than an exception. Furthermore, the presence of several potential zoonotic pathogens, of which four Leptospira species, in this urban rat population raised its role in the maintenance and spread of these pathogens. Our findings should stimulate future discussions about the development of a long-term rat-control management program in Chanteraines urban park.
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Affiliation(s)
- Amélie Desvars-Larrive
- Conservation Medicine, Research Institute of Wildlife Ecology, University of Veterinary Medicine, Vienna, Austria
| | - Michel Pascal
- Joint Research Unit (JRU) Écologie et Santé des Écosystèmes (ESE), Institut National de la Recherche Agronomique, INRA, Agrocampus Ouest, Rennes, France
| | - Patrick Gasqui
- Joint Research Unit (JRU) Epidémiologie des Maladies Animales et Zoonotiques (EPIA), Institut National de la Recherche Agronomique, INRA, VetAgro Sup, Saint-Genès Champanelle, France
| | - Jean-François Cosson
- Joint Research Unit (JRU) Biologie Moléculaire et Immunologie Parasitaire (BIPAR), Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Institut National de la Recherche Agronomique, INRA, Ecole Nationale Vétérinaire d'Alfort (ENVA), Maisons-Alfort, France
- Joint Research Unit (JRU) Centre de Biologie pour la Gestion des Populations (CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), Institut National de la Recherche Agronomique, INRA, Institut de Recherche pour le Développement (IRD), SupAgro Montpellier, France
| | - Etienne Benoît
- Contract-based Research Unit (CBRU) Rongeurs Sauvages–Risques Sanitaires et Gestion des Populations (RS2GP), VetAgro Sup, Institut National de la Recherche Agronomique, INRA, Lyon University, Marcy-L’Etoile, France
| | - Virginie Lattard
- Contract-based Research Unit (CBRU) Rongeurs Sauvages–Risques Sanitaires et Gestion des Populations (RS2GP), VetAgro Sup, Institut National de la Recherche Agronomique, INRA, Lyon University, Marcy-L’Etoile, France
| | - Laurent Crespin
- Joint Research Unit (JRU) Epidémiologie des Maladies Animales et Zoonotiques (EPIA), Institut National de la Recherche Agronomique, INRA, VetAgro Sup, Saint-Genès Champanelle, France
| | - Olivier Lorvelec
- Joint Research Unit (JRU) Écologie et Santé des Écosystèmes (ESE), Institut National de la Recherche Agronomique, INRA, Agrocampus Ouest, Rennes, France
| | - Benoît Pisanu
- Unité Mixte de Services (UMS) 2006 Patrimoine Naturel, Agence Française pour la Biodiversité (AFB), Muséum National d'Histoire Naturelle (MNHN), Centre National de la Recherche Scientifique (CNRS), Paris, France
| | - Alexandre Teynié
- Joint Research Unit (JRU) Epidémiologie des Maladies Animales et Zoonotiques (EPIA), Institut National de la Recherche Agronomique, INRA, VetAgro Sup, Saint-Genès Champanelle, France
| | - Muriel Vayssier-Taussat
- Joint Research Unit (JRU) Biologie Moléculaire et Immunologie Parasitaire (BIPAR), Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Institut National de la Recherche Agronomique, INRA, Ecole Nationale Vétérinaire d'Alfort (ENVA), Maisons-Alfort, France
| | - Sarah Bonnet
- Joint Research Unit (JRU) Biologie Moléculaire et Immunologie Parasitaire (BIPAR), Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Institut National de la Recherche Agronomique, INRA, Ecole Nationale Vétérinaire d'Alfort (ENVA), Maisons-Alfort, France
| | - Philippe Marianneau
- Virology Unit, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Lyon, France
| | - Sandra Lacôte
- Virology Unit, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Lyon, France
| | - Pascale Bourhy
- Institut Pasteur, Biology of Spirochetes Unit, National Reference Center and WHO Collaborating Center for Leptospirosis, Paris, France
| | - Philippe Berny
- Contract-based Research Unit (CBRU) Rongeurs Sauvages–Risques Sanitaires et Gestion des Populations (RS2GP), VetAgro Sup, Institut National de la Recherche Agronomique, INRA, Lyon University, Marcy-L’Etoile, France
| | - Nicole Pavio
- Joint Research Unit (JRU) Virology, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Institut National de la Recherche Agronomique, INRA, Ecole Nationale Vétérinaire d'Alfort (ENVA), Maisons-Alfort, France
| | - Sophie Le Poder
- Joint Research Unit (JRU) Virology, Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail (ANSES), Institut National de la Recherche Agronomique, INRA, Ecole Nationale Vétérinaire d'Alfort (ENVA), Maisons-Alfort, France
| | - Emmanuelle Gilot-Fromont
- Joint Research Unit (JRU) Laboratoire de Biométrie et Biologie Évolutive (LBBE), Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1, VetAgro Sup, Marcy-L’Etoile, France
| | - Elsa Jourdain
- Joint Research Unit (JRU) Epidémiologie des Maladies Animales et Zoonotiques (EPIA), Institut National de la Recherche Agronomique, INRA, VetAgro Sup, Saint-Genès Champanelle, France
| | - Abdessalem Hammed
- Contract-based Research Unit (CBRU) Rongeurs Sauvages–Risques Sanitaires et Gestion des Populations (RS2GP), VetAgro Sup, Institut National de la Recherche Agronomique, INRA, Lyon University, Marcy-L’Etoile, France
| | - Isabelle Fourel
- Contract-based Research Unit (CBRU) Rongeurs Sauvages–Risques Sanitaires et Gestion des Populations (RS2GP), VetAgro Sup, Institut National de la Recherche Agronomique, INRA, Lyon University, Marcy-L’Etoile, France
| | - Farid Chikh
- Conseil Départemental Hauts-de-Seine, Parc de Chanteraines, Villeneuve-la-Garenne, Paris, France
| | - Gwenaël Vourc’h
- Joint Research Unit (JRU) Epidémiologie des Maladies Animales et Zoonotiques (EPIA), Institut National de la Recherche Agronomique, INRA, VetAgro Sup, Saint-Genès Champanelle, France
- * E-mail:
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Makarikov AA. A taxonomic review of hymenolepidids (Eucestoda, Hymenolepididae) from dormice (Rodentia, Gliridae), with descriptions of two new species. Acta Parasitol 2017; 62:1-21. [PMID: 28030358 DOI: 10.1515/ap-2017-0001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 08/26/2016] [Indexed: 11/15/2022]
Abstract
In present study the systematic and taxonomic position of hymenolepidids parasitizing rodents of the family Gliridae from Europe and Central Asia is discussed. Hymenolepis myoxi is redescribed on the basis of the type material from the fat dormouse Glis glis deposited in the collection of the Museum für Naturkunde, Berlin, Germany. Significant corrections of morphologically distinctive characters attributable to H. myoxi include: (1) recognition of a rudimentary rostellar apparatus; (2) absence of rostellar hooks and spination on the suckers; and (3) tissues of the scolex and neck filled with numerous "firm elements". Hymenolepis sulcata was recognised as a synonym of H. myoxi (sensu stricto). The generic allocation of true H. myoxi and validity of the genus Armadolepis is clarified. Specimens from Eliomys quercinus originally designated as H. myoxi by Baer (1932) are described as a new species, Armadolepis jeanbaeri n. sp. The taxonomy has potentially been confused as Spassky (1954) designated misidentified specimens of H. myoxi sensu Baer (1932) as the type species of the genus Armadolepis. In the current article, this error is corrected and A. jeanbaeri n. sp. is fixed as the type of the genus Armadolepis. An additional new species of Armadolepis, A. tenorai n. sp., is described from Dryomys nitedula from Almaty Province, Kazakhstan. The generic diagnosis of Armadolepis is amended. Armadolepis (sensu stricto) is subdivided into two subgenera; the nominotypical subgenus includes species having well developed rostellar apparatus armed by rostellar hooks and A. (Bremserilepis) n. subgen. includes species with rudimentary and unarmed rostellar apparatus.
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Abstract
SUMMARYComplex life cycles are common in free-living and parasitic organisms alike. The adaptive decoupling hypothesis postulates that separate life cycle stages have a degree of developmental and genetic autonomy, allowing them to be independently optimized for dissimilar, competing tasks. That is, complex life cycles evolved to facilitate functional specialization. Here, I review the connections between the different stages in parasite life cycles. I first examine evolutionary connections between life stages, such as the genetic coupling of parasite performance in consecutive hosts, the interspecific correlations between traits expressed in different hosts, and the developmental and functional obstacles to stage loss. Then, I evaluate how environmental factors link life stages through carryover effects, where stressful larval conditions impact parasites even after transmission to a new host. There is evidence for both autonomy and integration across stages, so the relevant question becomes how integrated are parasite life cycles and through what mechanisms? By highlighting how genetics, development, selection and the environment can lead to interdependencies among successive life stages, I wish to promote a holistic approach to studying complex life cycle parasites and emphasize that what happens in one stage is potentially highly relevant for later stages.
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Tenora F. Corrections in the taxonomic position in the helminth-fauna of Apodemus spp. (Rodentia) in the Czech Republic. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2015. [DOI: 10.11118/actaun200452020007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Description and phylogenetic affinities of two new species of Nomadolepis (Eucestoda, Hymenolepididae) from Eastern Palearctic. Parasitol Int 2015; 64:453-63. [PMID: 26123997 DOI: 10.1016/j.parint.2015.06.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 06/21/2015] [Accepted: 06/25/2015] [Indexed: 11/21/2022]
Abstract
Two new species of hymenolepidid cestodes belonging to the genus Nomadolepis are described from small mammals in western Siberia and the Far East, Russian Federation. Nomadolepis fareasta n. sp. is described from the striped dwarf hamster Cricetulus barabensis in Amurskaya Oblast' and Nomadolepis shiloi n. sp. is described from the Eurasian harvest mouse Micromys minutus from Novosibirskaya Oblast' and Amurskaya Oblast'. Nomadolepis fareasta n. sp. differs from Nomadolepis merionis, Nomadolepis ellobii and N. shiloi n. sp. in having a substantially longer strobila, longer cirrus-sac and wider ovary. Furthermore, N. fareasta n. sp. can be readily distinguished from its congeners by the arrangement of the testes and the number and size of rostellar hooks. Nomadolepis shiloi n. sp. differs from N. merionis, N. ellobii and N. fareasta n. sp. by the number and length of the rostellar hooks, the presence of irregular transverse anastomoses as well as the length of the cirrus-sac and position of the cirrus-sac in relation to the poral ventral osmoregulatory canal. Morphological differentiation of the two new species from morphologically similar Palearctic species of the related genus Rodentolepis (sensu lato) from rodents is also provided. Phylogenetic affinities of Nomadolepis were studied for the first time using partial sequences of the nuclear ribosomal 28S DNA gene. Phylogenetic analysis strongly supported the status of Nomadolepis as a separate genus closest to Pararodentolepis.
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Abstract
The hamster species used as research models include the Syrian (golden), Mesocricetus auratus; the Chinese (striped-back), Cricetulus griseus; the Armenian (gray), C. migratorius; the European, Cricetus cricetus; and the Djungarian, Phodopus campbelli (Russian dwarf) and P. sungorus (Siberian dwarf). Hamsters are classified as members of the order Rodentia, suborder Myomorpha, superfamily Muroidea and in family Cricetidae. Animals in this family are characterized by large cheek pouches, thick bodies, short tails, and an excess of loose skin. They have incisors that erupt continuously and cuspidate molars that do not continue to grow ((I 1/1, C 0/0, PM 0/0, M 3/3) × 2 = 16). In 2010, it was reported that approximately 146,000 hamsters were used in research in the United States (United States Department of Agriculture, 2010).
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Affiliation(s)
- Emily L. Miedel
- University of Pennsylvania, University Laboratory Animal Resources, Philadelphia, PA, USA
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Abdel-Ghaffar F, Bashtar AR, Mehlhorn H, Abdel-Gaber R, Al Quraishy S, Saleh R. Morphological and phylogenetic analysis of Echinocephalus carpiae n. sp. (Nematoda: Gnathostomatidae) infecting the common carp Cyprinus carpio inhabiting Burullus Lake—a new host record in Egypt. Parasitol Res 2013; 112:4021-8. [DOI: 10.1007/s00436-013-3593-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 08/25/2013] [Indexed: 10/26/2022]
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12
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Abdel-Ghaffar F, Bashtar AR, Mehlhorn H, Abdel-Gaber R, Saleh R. Morphological and molecular characterization of Lecithochirium grandiporum (Digenea: Hemiuridae) infecting the European eel Anguilla anguilla as a new host record in Egypt. Parasitol Res 2013; 112:3243-50. [PMID: 23820602 DOI: 10.1007/s00436-013-3502-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Accepted: 06/12/2013] [Indexed: 10/26/2022]
Abstract
In the present study, the morphological and molecular characterization of Lecithochirium grandiporum, a digenetic trematode infecting the European eel Anguilla anguilla (Family (F): Anguillidae), were described for the first time from Burullus Lake, Kafr El-Sheikh Governorate, Egypt. Twenty-five out of 60 specimens (infection rate of 41.66%) were found to be naturally infected. Infection was recorded as small worms attached to the inner wall of the intestine of host fish. Adult worms measured 1.59 ± 0.20 (1.3-1.85) mm long and 0.3 ± 0.02 (0.29-0.48) mm wide for everted specimens with a smaller oral sucker measuring 0.15 ± 0.02 (0.13-0.18) mm, and a larger ventral sucker which was 0.16 ± 0.02 (0.14-0.25) mm. Our results recorded morphological differences as smaller dimensions of different body parts and the smaller oral/ventral sucker ratio between Lecithochirium fusiforme and L. grandiporum. Also, the phylogenetic position of the worm was determined by molecular characterization of their 18 SSU rDNA. Results were compared with those of previously recorded species on the Gene Bank. It was found that the present species coincide with those belonging to genus Lecithochirium. Comparison of the nucleotide sequences and divergence showed that the SSU rDNA gene of this Lecithochirium species revealed 92 % sequence identity with L. fusiforme (accession no. DQ413192) differing in 26 nucleotides with lower divergence value. According to these results, this study indicated that the present species is recorded as L. grandiporum with accession no. KC166146 as a parasite with new host and locality records in Egypt.
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Foronda P, López-González M, Hernández M, Haukisalmi V, Feliu C. Distribution and genetic variation of hymenolepidid cestodes in murid rodents on the Canary Islands (Spain). Parasit Vectors 2011; 4:185. [PMID: 21943096 PMCID: PMC3215934 DOI: 10.1186/1756-3305-4-185] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 09/26/2011] [Indexed: 11/20/2022] Open
Abstract
Background In the Canary Islands there are no previous data about tapeworms (Cestoda) of rodents. In order to identify the hymenolepidid species present in these hosts, a survey of 1,017 murine (349 Rattus rattus, 13 Rattus norvegicus and 655 Mus musculus domesticus) was carried out in the whole Archipelago. Molecular studies based on nuclear ITS1 and mitochondrial COI loci were performed to confirm the identifications and to analyse the levels of genetic variation and differentiation. Results Three species of hymenolepidids were identified: Hymenolepis diminuta, Rodentolepis microstoma and Rodentolepis fraterna. Hymenolepis diminuta (in rats) and R. microstoma (in mice) showed a widespread distribution in the Archipelago, and R. fraterna was the least spread species, appearing only on five of the islands. The hymenolepidids found on Fuerteventura, Lanzarote and La Graciosa were restricted to one area. The COI network of H. diminuta showed that the haplotypes from Lanzarote and Fuerteventura are the most distant with respect to the other islands, but clearly related among them. Conclusions Founder effects and biotic and abiotic factors could have played important role in the presence/absence of the hymenolepidid species in determined locations. The haplotypes from the eastern islands (Fuerteventura and Lanzarote) seem to have shared an ancestral haplotype very distant from the most frequent one that was found in the rest of the islands. Two colonization events or a single event with subsequent isolation and reduced gene flow between western-central and eastern islands, have taken place in the Archipelago. The three tapeworms detected are zoonotic species, and their presence among rodents from this Archipelago suggests a potential health risk to human via environmental contamination in high risk areas. However, the relatively low prevalence of infestations detected and the focal distribution of some of these species on certain islands reduce the general transmission risk to human.
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Affiliation(s)
- Pilar Foronda
- Institute of Tropical Diseases and Public Health of the Canary Islands, Avda, Astrofísico Fco, Sánchez s/n, 38203 Tenerife, Canary Islands, Spain.
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Cunningham LJ, Olson PD. Description of Hymenolepis microstoma (Nottingham strain): a classical tapeworm model for research in the genomic era. Parasit Vectors 2010; 3:123. [PMID: 21194465 PMCID: PMC3023764 DOI: 10.1186/1756-3305-3-123] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 12/31/2010] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Hymenolepis microstoma (Dujardin, 1845) Blanchard, 1891, the mouse bile duct tapeworm, is a rodent/beetle-hosted laboratory model that has been used in research and teaching since its domestication in the 1950s. Recent characterization of its genome has prompted us to describe the specific strain that underpins these data, anchoring its identity and bringing the 150+ year-old original description up-to-date. RESULTS Morphometric and ultrastructural analyses were carried out on laboratory-reared specimens of the 'Nottingham' strain of Hymenolepis microstoma used for genome characterization. A contemporary description of the species is provided including detailed illustration of adult anatomy and elucidation of its taxonomy and the history of the specific laboratory isolate. CONCLUSIONS Our work acts to anchor the specific strain from which the H. microstoma genome has been characterized and provides an anatomical reference for researchers needing to employ a model tapeworm system that enables easy access to all stages of the life cycle. We review its classification, life history and development, and briefly discuss the genome and other model systems being employed at the beginning of a genomic era in cestodology.
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Affiliation(s)
- Lucas J Cunningham
- Department of Zoology, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
| | - Peter D Olson
- Department of Zoology, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
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Haukisalmi V, Hardman LM, Foronda P, Feliu C, Laakkonen J, Niemimaa J, Lehtonen JT, Henttonen H. Systematic relationships of hymenolepidid cestodes of rodents and shrews inferred from sequences of 28S ribosomal RNA. ZOOL SCR 2010. [DOI: 10.1111/j.1463-6409.2010.00444.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Olson PD, Tkach VV. Advances and Trends in the Molecular Systematics of the Parasitic Platyhelminthes. ADVANCES IN PARASITOLOGY 2005; 60:165-243. [PMID: 16230104 DOI: 10.1016/s0065-308x(05)60003-6] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The application of molecular systematics to the parasitic Platyhelminthes (Cestoda, Digenea and Monogenea) over the last decade has advanced our understanding of their interrelationships and evolution substantially. Here we review the current state of play and the early works that led to the molecular-based hypotheses that now predominate in the field; advances in their systematics, taxonomy, classification and phylogeny, as well as trends in species circumscription, molecular targets and analytical methods are discussed for each of the three major parasitic groups. A by-product of this effort has been an ever increasing number of parasitic flatworms characterized genetically, and the useful application of these data to the diagnosis of animal and human pathogens, and to the elucidation of life histories are presented. The final section considers future directions in the field, including taxon sampling, molecular targets of choice, and the current and future utility of mitochondrial and nuclear genomics in systematic study.
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Affiliation(s)
- Peter D Olson
- Division of Parasitology, Department of Zoology, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
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Snábel V, Hanzelová V, Scholz T, Gerdeaux D, Cabaret J. Allozyme analysis of genetic variation and polymorphism in Eubothrium salvelini and E. crassum (Cestoda: Pseudophyllidea) from alpine lakes. Parasitol Res 2004; 93:290-5. [PMID: 15175878 DOI: 10.1007/s00436-004-1129-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2004] [Accepted: 04/16/2004] [Indexed: 12/01/2022]
Abstract
The genetic structure of the most abundant species in the genus Eubothrium, E. crassum and E. salvelini, was studied by allozyme analysis in order to provide a consistent diagnosis for these morphologically similar species, as well as to assess their genetic relatedness. The proportion of fixed allelic differences (56.3%, 9 of 16 loci) between the species falls within the range accepted for valid species. A strict host specificity of E. crassum and E. salvelini for their typical host (lake trout, Arctic charr, respectively) was found in the French localities examined (Lake Annecy, Lake Bourget). For E. salvelini, polymorphism with the established allelic profile was found in the acid phosphatase (ACP) system. No significant deviation from the Hardy-Weinberg equilibrium expectations for ACP were found in either of the E. salvelini populations, which suggests predominantly cross-fertilization of these hermaphrodites. Analysis of the standardized variance in allelic frequencies demonstrated almost no among population differentiation (estimator theta of Fst = -0.03) between E. salvelini populations.
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Affiliation(s)
- Viliam Snábel
- Parasitological Institute, Slovak Academy of Sciences, Hlinkova 3, Kosice, Slovak Republic.
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Santalla F, Casanova JC, Durand P, Vaucher C, Renaud F, Feliu C. Morphometric and genetic variability of Rodentolepis asymmetrica (Hymenolepididae) from the Pyrenean mountains. J Parasitol 2002; 88:983-8. [PMID: 12435141 DOI: 10.1645/0022-3395(2002)088[0983:magvor]2.0.co;2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Rodentolepis asymmetrica (Janicki, 1904), is a common hymenolepidid cestode recorded in several vole species (rodents) in the Palearctic. Here, we report a detailed analysis of this species, which includes metrical features and multilocus enzyme electrophoresis. Worms isolated from 4 species of arvicolid hosts in 3 localities in Spain and France from 1994 to 1997 were studied. All the worms used in the morphological study ranged between I and 5 individuals per host. Furthermore, all individuals were analyzed electrophoretically. Statistical analysis of metrical features in scolex, sexual segments, and eggs was carried out, and significant differences were detected only in sexual structures of mature segments. These differences were found in worms from each host species in different localities and in the same host species in 2 localities. Multivariate statistical analysis shows correct classification of worms in all cases. Surprisingly, we observed a lack of genetic variability at the 11 enzymatic loci analyzed, which could be explained by 2 nonexclusive hypotheses: (1) a preferential selfing mode of reproduction for these parasites, and (2) a weak effective size of parasite populations.
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Affiliation(s)
- Francis Santalla
- Laboratori de Parasitologia, Facultat de Farmàcia, Universitat de Barcelona, Spain.
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