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Parasitology Research

Jie Wu, Jian-Qiang Han, Lian-Qin Shi, Yang Zou, Zhao Li, Jian-Fa Yang, Cui-Qin Huang, Feng-Cai Zou
Microsporidiosis is an important zoonotic disease, even leading to severe diarrhea. However, no information about prevalence and genotypes of Enterocytozoon bieneusi infection in Asiatic black bears in southwestern China is available. The objectives of the present study were to investigate the prevalence of E. bieneusi and to characterize their genotypes using the nested PCR amplification of the internal transcribed spacer region of the ribosomal RNA gene cluster and multilocus sequence typing (MLST). The overall prevalence of E...
February 15, 2018: Parasitology Research
Guillermo Panisse, María Celina Digiani
A new species of Heligmonellidae (Trichostrongylina, Heligmosomoidea), Stilestrongylus kaaguyporai n. sp. is described from the small intestine of Euryoryzomys russatus (Rodentia, Cricetidae, Sigmodontinae) from the Argentine Atlantic Forest, in the Misiones province. The new species was found at Campo Anexo Manuel Belgrano, Reserva de Vida Silvestre Urugua-í and Parque Provincial Urugua-í, with a prevalence of 73% in 15 hosts examined. Stilestrongylus includes 24 Neotropical species, all parasitic in rodents, mostly Sigmodontinae...
February 14, 2018: Parasitology Research
Felipe Penagos-Tabares, Malin K Lange, Anika Seipp, Ulrich Gärtner, Helena Mejer, Anja Taubert, Carlos Hermosilla
The anthropozoonotic metastrongyloid nematodes Angiostrongylus cantonensis and Angiostrongylus costaricensis, as well as Angiostrongylus vasorum, Crenosoma vulpis, Aelurostrongylus abstrusus and Troglostrongylus brevior are currently considered as emerging gastropod-borne parasites and have gained growing scientific attention in the last years. However, the knowledge on invertebrate immune responses and on how metastrongyloid larvae are attacked by gastropod immune cells is still limited. This work aims to describe an in vitro system to investigate haemocyte-derived innate immune responses of terrestrial gastropods induced by vital axenic metastrongyloid larvae...
February 13, 2018: Parasitology Research
T A Kuzmina, V V Tkach, T R Spraker, E T Lyons, O Kudlai
A parasitological survey of 651 northern fur seals Callorhinus ursinus L. from five subpopulations was conducted on St. Paul Island, Alaska, during July-August 2012-2014. Digenean trematodes were found in 210 of 651 fur seals with a total prevalence of 32.3%. Intensity of infection varied from 1 to 1540 parasites with mean intensity 18.4 ± 111.1 SD and median intensity of 2 specimens per host. Significant differences in prevalence and intensity of infection in northern fur seals between separate rookeries was not observed (Mann-Whitney test; p > 0...
February 12, 2018: Parasitology Research
Alba Cortés, Carla Muñoz-Antolí, María Álvarez-Izquierdo, Javier Sotillo, J Guillermo Esteban, Rafael Toledo
Echinostoma caproni (Trematoda: Echinostomatidae) is an intestinal trematode, broadly employed to study the host-dependent mechanisms that govern the evolution of intestinal helminth infections. Resistance against E. caproni homologous secondary infections has been reported in mice and appears to be related to the generation of a local Th2 response, whereas Th1 responses promote the development of chronic primary infections. Herein, the ability of E. caproni to modulate its secretome according to the host environment is investigated...
February 12, 2018: Parasitology Research
Gun Koleoglu, Paul H Goodwin, Mariana Reyes-Quintana, Mollah Md Hamiduzzaman, Ernesto Guzman-Novoa
Circulating hemocytes are responsible for defensive and healing mechanisms in the honey bee, Apis mellifera. Parasitism by the mite Varroa destructor and injection of V. destructor homogenate in buffer, but not buffer injection, showed similar reductions in total hemocyte concentrations in both Africanized and European adult honey bees. This indicated that compounds in V. destructor homogenate can have similar effects as V. destructor parasitism and that the response is not solely due to wounding. Samples from honey bees with different hemocyte concentrations were compared for the expression patterns of hemolectin (AmHml), prophenol oxidase (AmPpo), and class C scavenger receptor (AmSRC-C)...
February 12, 2018: Parasitology Research
Patricia Santos Matos, Diehgo Tuloza da Silva, Igor Hamoy, Edilson Matos
Hoferellus azevedoi n. sp. was found in the urinary bladder of Chaetobranchus flavescens Heckel, 1840 from the Arari River on Marajó Island in Pará, Brazil. This is the first record of a species of the genus Hoferellus in a host from the Brazilian Amazon region. The new species has disporous and polysporous plasmodia, which vary in size and shape, with some being found adhered to the epithelium of the urinary bladder, and others floating in the liquid. The mature spores are sub-spherical in the sutural view, with a number of peripheral projections around the whole surface of the spore...
February 12, 2018: Parasitology Research
Arthur do Nascimento Cabral, Diego Alves Teles, Samuel Vieira Brito, Waltécio de Oliveira Almeida, Luciano Alves Dos Anjos, Míriam Camargo Guarnieri, Samuel Cardozo Ribeiro
We provide data on the helminth fauna from the digestive tract of the lizard Mabuya arajara Rebouças-Spieker, 1981 from Chapada do Araripe, northeastern Brazil. Seventy one of the 127 lizards examined (56%) were infected with four nematode species: Physalopteroides venancioi and Physaloptera sp. (Physalopteridae), Strongyluris oscari (Heterakidae), and Parapharyngodon alvarengai (Pharyngodonidae), the latter being the component species (prevalence 53.5%; mean intensity of infection 3.37 ± 2.0; discrepancy index D = 0...
February 12, 2018: Parasitology Research
Gabriela García, Fernando Ramos, Fernando Martínez-Hernández, Lilian Hernández, Jorge Yáñez, Paul Gaytán
Entamoeba gingivalis is a protozoan that resides in the oral cavity. Using molecular biology techniques, we identified a novel organism that shares the same ecological niche as E. gingivalis. To differentiate this organism from E. gingivalis, we named it "kamaktli variant." By sequencing the 18S-ITS1-5.8S-ITS2 rRNA region, we demonstrated that kamaktli variant is 89% identical to E. gingivalis. To elucidate the relationship between kamaktli variant and E. gingivalis, we performed a phylogenetic analysis. Both taxa clustered in the same clade with high support, indicating that the amoebas are closely related (98/99/1...
February 10, 2018: Parasitology Research
Marco Pezzi, Chiara Scapoli, Elisabetta Mamolini, Marilena Leis, Teresa Bonacci, Daniel Whitmore, Stjepan Krčmar, Marica Furini, Sauro Giannerini, Milvia Chicca, Rosario Cultrera, Michel J Faucheux
The haematophagous females of the cleg fly Haematopota pandazisi (Kröber) (Diptera: Tabanidae) are a common pest in areas inhabited by wild and domestic ungulates in southern Europe, North Africa and Anatolia. A morphological investigation by scanning electron microscopy (SEM) was carried out for the first time on the antennae of females of H. pandazisi, with special attention to the type and distribution of sensilla and microtrichia. The typical brachyceran antenna is divided into three regions: the scape, the pedicel and the flagellum, which is the longest of the three and is composed of four flagellomeres...
February 10, 2018: Parasitology Research
A Trujillo-González, J A Becker, D B Vaughan, K S Hutson
The ornamental fish trade provides a pathway for the global translocation of aquatic parasites. We examined a total of 1020 fish imported from Singapore, Malaysia, Thailand, or Sri Lanka to Australia (including freshwater and marine fish species) for monogenean ectoparasites. Fish were received following veterinary certification that they showed no clinical signs of pests and diseases from the exporting country and visual inspection at Australian border control. Australian import conditions require mandatory treatment for goldfish with parasiticides (e...
February 9, 2018: Parasitology Research
Yong-Li Luo, Guang-Xu Ma, Yong-Fang Luo, Ce-Yan Kuang, Ai-Yun Jiang, Guo-Qing Li, Rong-Qiong Zhou
Toxocara canis is a zoonotic parasite with worldwide distribution. ATP-binding cassette (ABC) transporters are integral membrane proteins which involve in a range of biological processes in various organisms. In present study, the full-length coding sequence of abcg-5 gene of T. canis (Tc-abcg-5) was cloned and characterized. A 633 aa polypeptide containing two conserved Walker A and Walker B motifs was predicted from a continuous 1902 nt open reading frame. Quantitative real-time PCR was employed to determine the transcriptional levels of Tc-abcg-5 gene in adult male and female worms, which indicated high mRNA level of Tc-abcg-5 in the reproductive tract of adult female T...
February 8, 2018: Parasitology Research
Valentina Chisu, Cipriano Foxi, Antonio Tanda, Giovanna Masala
Ticks are well known to be important vectors for a wide range of bacteria, viruses and protozoa affecting human and animal health. Ixodid ticks are widely distributed in Sardinia, and an increasing number of tick-borne bacteria have been documented in the island. A growing number of evidence are supporting the hypothesis of alternative transmission routes for chlamydial bacteria such as the involvement of vectors. This study was conducted to provide possible molecular detection of members belonging to the Chlamydiales order in Sardinian ticks and to update information concerning the presence of new ectoparasite-borne bacteria in ticks collected from domestic and wild hosts in a typical Mediterranean environment...
February 7, 2018: Parasitology Research
Matthew J Buchholz, Cheryl Davis, Naomi S Rowland, Carl W Dick
The incidence of tick-borne zoonoses such as Lyme disease has steadily increased in the southeastern United States. Southeastern states accounted for 1500 of over 28,000 confirmed cases of Lyme disease reported in the United States during 2015. Borrelia burgdorferi, the etiologic agent of Lyme disease, is maintained in small mammal reservoirs and vectored to new hosts by ixodid ticks. This study examined ecological relationships of the B. burgdorferi/vector/reservoir system in order to understand the dynamics of Lyme disease risk in Kentucky...
February 7, 2018: Parasitology Research
Haruya Sakai, Eigo Kato, Seiho Sakaguchi, Aogu Setsuda, Hiroshi Sato
The Japanese Spanish mackerel (Scomberomorus niphonius; Perciformes: Scombridae) is widely distributed in the continental shelves of the northwestern Pacific Ocean around Japan, Sea of Japan, and East China Sea. In the present study, small, spindle-shaped myxosporean plasmodia (0.15-0.53 mm by 0.04-0.13 mm) were frequently encountered in the myofiber of trunk muscles of two Japanese Spanish mackerels; one fished in the Sea of Japan off western Japan and the other in the northwestern Pacific Ocean off southern Japan in the autumn of 2016...
February 7, 2018: Parasitology Research
Matheus D Baldissera, Carine F Souza, Bernardo Baldisserotto
The spleen is an immune lymphatic organ linked with control of the immune response, which is important to fish health. Recent evidence has suggested the involvement of purinergic signaling in the modulation of immune and inflammatory responses through the nucleotide adenosine triphosphate (ATP) and the nucleoside adenosine (Ado), which are regulated by the enzymes nucleoside triphosphate diphosphohydrolase (NTPDase), 5'-nucleotidase, and adenosine deaminase (ADA). Thus, the aim of this study was to evaluate whether purinergic signaling can modulate the immune and inflammatory responses in the spleen of silver catfish (Rhamdia quelen) naturally infected with Ichthyophthirius multifiliis...
February 7, 2018: Parasitology Research
Ondřej Máca
Muscular sarcosporidial infections by Sarcocystis lutrae (Apicomplexa: Sarcocystidae) from the otter (Lutra lutra) and badger (Meles meles) (Carnivora: Mustelidae) were found in the Czech Republic. As part of a diversity evaluation of Sarcocystis in wild carnivores during 2016-2017, samples of diaphragm, tongue and hind-limb muscles were collected from nine districts, examined by compression and characterized molecularly. Cyst walls were thin, with no visible protrusions, and histological sections of infected muscle tissue showed no host responses...
February 7, 2018: Parasitology Research
Jorge Néstor Velásquez, María Laura Pantano, Natalia Vittar, Mónica Gabriela Nigro, Olga Figueiras, Osvaldo Germán Astudillo, Javier Ricart, Daniela Della Paolera, Silvana Carnevale
Human cryptosporidiosis is an intestinal infection caused by different species belonging to the genus Cryptosporidium in both immunocompetent and immunocompromised individuals. The life cycle of Cryptosporidium sp. when affecting the digestive system is well known but the infection of other organs is less studied. Molecular methods are necessary for species and subtypes identification. The goal of this work is to propose a new approach that contributes to the diagnosis of the extra-intestinal dissemination process of Cryptosporidium infection...
February 6, 2018: Parasitology Research
Saleh Al-Quraishy, Mohamed A Dkhil, Abdel Azeem S Abdel-Baki, Denis Delic, Frank Wunderlich
Current knowledge about liver responses to blood-stage malaria and their modulation by vaccination is still unclear. This study investigated effects of protective vaccination on liver gene and lincRNA expression of Balb/c mice at early prepatency of Plasmodium chabaudi blood-stage malaria. When a blood-stage vaccine was used to induce > 80% survival of otherwise lethal malaria, significant differences (p < 0.01) were detectable in global liver gene expression between vaccination-protected (potentially surviving) and non-protected non-vaccinated mice on day 1 p...
February 5, 2018: Parasitology Research
Victoriano Díaz Sáez, F Morillas-Márquez, G Merino-Espinosa, V Corpas-López, M Morales-Yuste, B Pesson, S Barón-López, J Lucientes-Curdi, J Martín-Sánchez
Burrows of the wild rabbit, Oryctolagus cuniculus, a lagomorph that has been recently suggested as a Leishmania infantum reservoir, constitute an unspoilt biotope in phlebotomine studies in Europe. We hypothesize that Phlebotomus langeroni, a proven vector of L. infantum in North Africa, is associated with rabbits and may have been overlooked in Europe. Sandfly captures were carried out with CDC light traps in an L. infantum endemic area of southern Spain with a high density of lagomorphs and a large numbers of burrows...
February 5, 2018: Parasitology Research
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