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Parasite: Journal de la Société Française de Parasitologie

Grégory Karadjian, Aurélie Heckmann, Giuseppe La Rosa, Edoardo Pozio, Pascal Boireau, Isabelle Vallée
In order to identify Trichinella at the species level, the commonly used test is a multiplex PCR, allowing the discrimination of nine out of the twelve taxa described so far. This test is based on five primer pairs amplifying fragments of the large subunit rDNA. Each taxon produces one or two bands of different sizes, resulting in a specific band pattern. By multiplex PCR, Trichinella murrelli shows two bands of 127 bp and 316 bp. However, a third band of 256 bp can occur. This band can lead to misidentification, since it is similar to the 253 bp band displayed by Trichinella britovi...
2017: Parasite: Journal de la Société Française de Parasitologie
Stefanie Wiedmer, Alexander Erdbeer, Beate Volke, Stephanie Randel, Franz Kapplusch, Sacha Hanig, Michael Kurth
The genus Eimeria (Apicomplexa, Coccidia) provides a wide range of different species with different hosts to study common and variable features within the genus and its species. A common characteristic of all known Eimeria species is the oocyst, the infectious stage where its life cycle starts and ends. In our study, we utilized Eimeria nieschulzi as a model organism. This rat-specific parasite has complex oocyst morphology and can be transfected and even cultivated in vitro up to the oocyst stage. We wanted to elucidate how the known oocyst wall-forming proteins are preserved in this rodent Eimeria species compared to other Eimeria...
2017: Parasite: Journal de la Société Française de Parasitologie
Patience C Igeh, Quinton M Dos Santos, Annemariè Avenant-Oldewage
The sclerotized structures of monogeneans have traditionally been studied by light microscopy and different staining techniques. Recently, enzymatic digestion followed by scanning electron microscopy (SEM) has enabled the examination of structural details not visible with light microscopy. In order to obtain better, and more accurate, morphological information on sclerotized structures not affected by mounting medium or cover slip pressure, the sclerites of Cichlidogyrus philander Douëllou, 1993 (Monogenea, Ancyrocephalidae), collected from Pseudocrenilabrus philander (Weber, 1897), were redescribed using SEM...
2017: Parasite: Journal de la Société Française de Parasitologie
Zhenchao Zhang, Shuai Wang, Charles Li, Liheng Liu
The apicomplexan protozoans Eimeria spp. cause coccidioses, the most common intestinal diseases in chickens. Coccidiosis is associated with significant animal welfare issues and has a high economic impact on the poultry industry. Lack of a full understanding of immunogenic molecules and their precise functions involved in the Eimeria life cycles may limit development of effective vaccines and drug therapies. In this study, immunoproteomic approaches were used to define the antigenic protein repertoire from the total proteins of unsporulated Eimeria tenella oocysts...
2017: Parasite: Journal de la Société Française de Parasitologie
Véronique Lehrter, Anne-Laure Bañuls, Nicole Léger, Jean-Antoine Rioux, Jérôme Depaquit
Phlebotomus riouxi Depaquit, Killick-Kendrick & Léger 1998 was described as a species closely related to Phlebotomus chabaudi Croset, Abonnenc & Rioux 1970, differing mainly by the size and number of setae of the coxite basal lobe. Molecular studies carried out on several populations from Algeria and Tunisia and based on mitochondrial genes cytochrome b (Cytb) and cytochrome oxidase I (COI) supported the typological validity of these two species. Recently, specimens from a single population in southern Tunisia were morphologically identified as Ph...
2017: Parasite: Journal de la Société Française de Parasitologie
Liseth Rubi Aldaba-Muruato, Martín Humberto Muñoz-Ortega, José Roberto Macías-Pérez, Julieta Pulido-Ortega, Sandra Luz Martínez-Hernández, Javier Ventura-Juárez
Oxidative stress and transcriptional pathways of nuclear factor erythroid 2-related factor 2 (Nrf2) and nuclear factor kappa-B (NF-κB) are critically involved in the etiopathology of amebic liver abscess (ALA). In this work, we studied the relationship between the adrenergic nervous system and ALA in the hamster. ALA was visible at 12 h of infection. While 6-hydroxidopamine (6-OHDA) decreased infection, propranolol (β-adrenergic blocker) treatment was associated with less extensive liver damage, and phentolamine treatment (α-adrenergic blocker) significantly reduced ALA compared to 6-OHDA and propranolol...
2017: Parasite: Journal de la Société Française de Parasitologie
Geneviève Zabré, Adama Kaboré, Balé Bayala, Luciana M Katiki, Lívio Martins Costa-Júnior, Hamidou H Tamboura, Adrien M G Belem, Adibe L Abdalla, Vincent Niderkorn, Hervé Hoste, Helder Louvandini
Gastrointestinal nematodes are a major threat to small ruminant rearing in the Sahel area, where farmers traditionally use bioactive plants to control these worms, including Acacia nilotica and Acacia raddiana. The main aim of this study was to screen the potential anthelmintic properties of aqueous and acetone extracts of leaves of these two plants based on three in vitro assays: (1) the egg hatch inhibition assay (EHA); (2) the larvae exsheathment inhibition assay (LEIA) using Haemonchus contortus as a model; and (3) an adult mortality test (AMT) applied on Caenorhabditis elegans...
2017: Parasite: Journal de la Société Française de Parasitologie
Yong Yao, Miao Liu, Cuiping Ren, Jijia Shen, Yongsheng Ji
Toxoplasma gondii is an intra-cellular protozoan parasite that can infect almost all nucleated cells, eliciting host immune responses against infection. Host tissue damage is mainly caused by cellular lysis when T. gondii egresses from infected cells. However, the effects of cytokines released by host immune cells on egression of T. gondii remain elusive. This study aimed to investigate the role of tumor necrosis factor-alpha (TNF-α) on the egress of T. gondii from infected human foreskin fibroblast (HFF) cells and to elucidate the underlying mechanisms that regulate TNF-α-induced egress...
2017: Parasite: Journal de la Société Française de Parasitologie
Jérôme Depaquit, Bernard Pesson, Denis Augot, James Gordon Campbell Hamilton, Phillip Lawyer, Nicole Léger, Phillip Lawyer, Mireille Killick-Kendrick, Tobin Rowland, Edgar Rowton, Petr Volf
Laboratory colonies of phlebotomine sand flies are necessary for experimental study of their biology, behaviour and mutual relations with disease agents and for testing new methods of vector control. They are indispensable in genetic studies and controlled observations on the physiology and behaviour of sand flies, neglected subjects of high priority. Colonies are of particular value for screening insecticides. Colonized sand flies are used as live vector models in a diverse array of research projects, including xenodiagnosis, that are directed toward control of leishmaniasis and other sand fly-associated diseases...
2017: Parasite: Journal de la Société Française de Parasitologie
Zongyi Sun, Chuanqi Jiang, Jinmei Feng, Wentao Yang, Ming Li, Wei Miao
In this paper, we present transcriptome data for Balantidium ctenopharyngodoni Chen, 1955 collected from the hindgut of grass carp (Ctenopharyngodon idella). We evaluated sequence quality and de novo assembled a preliminary transcriptome, including 43.3 megabits and 119,141 transcripts. Then we obtained a final transcriptome, including 17.7 megabits and 35,560 transcripts, by removing contaminative and redundant sequences. Phylogenomic analysis based on a supermatrix with 132 genes comprising 53,873 amino acid residues and phylogenetic analysis based on SSU rDNA of 27 species were carried out herein to reveal the evolutionary relationships among six ciliate groups: Colpodea, Oligohymenophorea, Litostomatea, Spirotrichea, Heterotrichea and Protocruziida...
2017: Parasite: Journal de la Société Française de Parasitologie
Kai Chen, Jin-Lei Wang, Si-Yang Huang, Wen-Bin Yang, Wei-Ning Zhu, Xing-Quan Zhu
Toxoplasma gondii, an intracellular zoonotic protozoan parasite, is possibly the most widespread parasite of warm-blooded animals and can cause serious public health problems and economic losses worldwide. TgCDPK2, a member of the T. gondii calcium-dependent protein kinase family, was recently identified as an essential regulator for viable cyst development in T. gondii. In the present study, we evaluated the protective immunity induced by DNA vaccination based on a recombinant eukaryotic plasmid, pVAX-TgCDPK2, against acute toxoplasmosis in mice...
2017: Parasite: Journal de la Société Française de Parasitologie
Omar M Amin, Richard A Heckmann
The cystacanths of Neoandracantha peruensis n. gen. n. sp. are described from the ghost crab Ocypode gaudichaudii collected from the Pacific coast of Peru. While it is uncommon to describe acanthocephalan taxa from immature stages, the presence of clear-cut distinguishing features separating the present material from its nearest congeneric taxa, and the absence of adults, justifies the erection N. peruensis. The new genus is distinguished by having three separate fields of trunk spines. Specimens of N. peruensis have a slender trunk with two anterior swellings, 3 separate fields of spines on the foretrunk swelling, and no genital spines on the hindtrunk...
2017: Parasite: Journal de la Société Française de Parasitologie
Julian Liebenberg, Josephus Fourie, Wilfried Lebon, Diane Larsen, Lenaïg Halos, Frédéric Beugnet
Twelve healthy dogs were studied in this parallel group, blinded, randomised, and negative controlled efficacy study. On Day -1, the 12 dogs included were ranked within sex in descending order of individual pre-treatment (Day -5) fed mosquito counts and randomly allocated by blocks of two dogs to the untreated control group or the afoxolaner-treated group. NexGard(®) (Merial, now part of Boehringer Ingelheim Animal Health) was administered orally on Day 0 in accordance with the European label instructions...
2017: Parasite: Journal de la Société Française de Parasitologie
Quazim Olawale Junaid, Loke Tim Khaw, Rohela Mahmud, Kien Chai Ong, Yee Ling Lau, Prajakta Uttam Borade, Jonathan Wee Kent Liew, Sinnadurai Sivanandam, Kum Thong Wong, Indra Vythilingam
BACKGROUND: As the quest to eradicate malaria continues, there remains a need to gain further understanding of the disease, particularly with regard to pathogenesis. This is facilitated, apart from in vitro and clinical studies, mainly via in vivo mouse model studies. However, there are few studies that have used gerbils (Meriones unguiculatus) as animal models. Thus, this study is aimed at characterizing the effects of Plasmodium berghei ANKA (PbA) infection in gerbils, as well as the underlying pathogenesis...
2017: Parasite: Journal de la Société Française de Parasitologie
Luciana Vieira do R Lima, Liliane Almeida Carneiro, Marliane Batista Campos, Thiago Vasconcelos Dos Santos, Patrícia Karla Ramos, Márcia Dalastra Laurenti, Claudio Eduardo C Teixeira, Fernando T Silveira
We present here a cross-sectional study analyzing the IgG1 and IgG2 immune responses to natural canine Leishmania (L.) infantum chagasi-infection and their relationships with delayed-type hypersensitivity (DTH) in 50 mongrel dogs with previous positive serodiagnoses (IFAT-IgG) (56% with subclinical status [= apparently healthy] and 44% clinically sick), living in endemic areas for visceral leishmaniasis in the Brazilian Amazon. IgG1 and IgG2 responses were measured using commercial polyclonal antibodies in ELISA, while DTH was elicited by intradermal skin test using cultured promastigotes L...
2017: Parasite: Journal de la Société Française de Parasitologie
Mei Yang, Jun Li, Jun Wu, Hui Wang, Baoping Guo, Chuanchuan Wu, Xi Shou, Ning Yang, Zhuangzhi Zhang, Donald P McManus, Fuchun Zhang, Wenbao Zhang
Cystic echinococcosis is an important parasitic zoonosis caused by the dog tapeworm Echinococcus granulosus. Little is known about adult worm development at the molecular level. Transcription analysis showed that the E. granulosus hormone receptor 3-like (EgHR3) gene was expressed in protoscoleces and adult worms, indicating its role in early adult development. In this study, we cloned and characterized EgHR3 showing that its cDNA contains an open reading frame (ORF) of 1890 bp encoding a 629 amino acid protein, which has a DNA-binding domain (DBD) and a ligand-binding domain (LBD)...
2017: Parasite: Journal de la Société Française de Parasitologie
Jianwei Zhang, Qingbiao Liu, Demou Wang, Wanmeng Li, Frédéric Beugnet, Jinlin Zhou
To understand the epidemiology of tick infestation and tick-borne diseases in pet dogs in south-eastern China and to develop a reference for their prevention and treatment, we collected 1550 ticks parasitizing 562 dogs in 122 veterinary clinics from 20 cities of south-eastern China. Dogs were tested for common tick-borne pathogens; collected ticks were identified and processed for the detection of tick-borne pathogens. The use of an in vitro ELISA diagnostic kit for antibody detection (SNAP®4Dx® Plus) on dog sera found the infection rates with Borrelia burgdorferi sensu lato, Ehrlichia canis, and Anaplasma spp...
2017: Parasite: Journal de la Société Française de Parasitologie
Thalita Gagini, Armando de Oliveira Schubach, Maria de Fatima Madeira, Cláudia Maria Valete-Rosalino, Maria Inês Fernandes Pimentel, Raquel da Silva Pacheco
BACKGROUND: Forty-four strains isolated from a cohort of cutaneous leishmaniasis (CL) patients who did or did not respond to one course of treatment with meglumine antimoniate were investigated to explore genetic polymorphisms in parasite kinetoplast DNA minicircles. Leishmania (Viannia) braziliensis strains isolated from responder (R) and non-responder (NR) patients who acquired infection in Rio de Janeiro or in other Brazilian states were studied using low-stringency single-specific primer polymerase chain reaction (LSSP-PCR) to identify genetic polymorphisms...
2017: Parasite: Journal de la Société Française de Parasitologie
Jorge J Rodríguez-Rojas, Ángel Rodríguez-Moreno, Miriam Berzunza-Cruz, Gabriel Gutiérrez-Granados, Ingeborg Becker, Victor Sánchez-Cordero, Christopher R Stephens, Ildefonso Fernández-Salas, Eduardo A Rebollar-Téllez
Leishmaniases are a group of important diseases transmitted to humans through the bite of sandfly vectors. Several forms of leishmaniases are endemic in Mexico and especially in the Southeast region. In the Northeastern region, however, there have only been isolated reports of cases and scanty records of sandfly vectors. The main objective of this study was to analyze the diversity of sandflies and potential reservoir hosts of Leishmania spp. in the states of Nuevo León and Tamaulipas. Species richness and abundances of sandflies and rodents were recorded...
2017: Parasite: Journal de la Société Française de Parasitologie
Felix Heckendorn, Anna Bieber, Steffen Werne, Anastasios Saratsis, Veronika Maurer, Chris Stricker
Gastrointestinal nematodes (GIN) severely affect small ruminant production worldwide. Increasing problems of anthelmintic resistance have given strong impetus to the search for alternative strategies to control GIN. Selection of animals with an enhanced resistance to GIN has been shown to be successful in sheep. In goats, the corresponding information is comparatively poor. Therefore, the present study was designed to provide reliable data on heritabilities of and genetic correlations between phenotypic traits linked to GIN and milk yield in two major dairy goat breeds (Alpine and Saanen)...
2017: Parasite: Journal de la Société Française de Parasitologie
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