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Parasites & Vectors

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https://www.readbyqxmd.com/read/28728607/zika-virus-transmission-to-mouse-ear-by-mosquito-bite-a-laboratory-model-that-replicates-the-natural-transmission-process
#1
Nagila Francinete Costa Secundino, Barbara Aparecida Chaves, Alessandra Silva Orfano, Karine Renata Dias Silveira, Nilton Barnabe Rodrigues, Thais Bonifácio Campolina, Rafael Nacif-Pimenta, Luiz Eduardo Martinez Villegas, Breno Melo Silva, Marcus Vinícius Guimarães Lacerda, Douglas Eric Norris, Paulo Filemon Paolucci Pimenta
BACKGROUND: Zika disease has transformed into a serious global health problem due to the rapid spread of the arbovirus and alarming severity including congenital complications, microcephaly and Guillain-Barré syndrome. Zika virus (ZIKV) is primarily transmitted to humans through the bite of an infective mosquito, with Aedes aegypti being the main vector. METHODS: We successfully developed a ZIKV experimental transmission model by single infectious Ae. aegypti bite to a laboratory mouse using circulating Brazilian strains of both arbovirus and vector...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28728589/occurrence-of-strongyloidiasis-in-privately-owned-and-sheltered-dogs-clinical-presentation-and-treatment-outcome
#2
Paola Paradies, Fabrizio Iarussi, Mariateresa Sasanelli, Antonio Capogna, Riccardo Paolo Lia, Daniele Zucca, Beatrice Greco, Cinzia Cantacessi, Domenico Otranto
BACKGROUND: The increasing number of reports of human infections by Strongyloides stercoralis from a range of European countries over the last 20 years has spurred the interest of the scientific community towards this parasite and, in particular, towards the role that infections of canine hosts may play in the epidemiology of human disease. Data on the epidemiology of canine strongyloidiasis is currently limited, most likely because of the inherent limitations of current diagnostic methods...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28728588/genetic-structure-and-gene-flow-of-the-flea-xenopsylla-cheopis-in-madagascar-and-mayotte
#3
Mireille Harimalala, Sandra Telfer, Hélène Delatte, Phillip C Watts, Adélaïde Miarinjara, Tojo Rindra Ramihangihajason, Soanandrasana Rahelinirina, Minoarisoa Rajerison, Sébastien Boyer
BACKGROUND: The flea Xenopsylla cheopis (Siphonaptera: Pulicidae) is a vector of plague. Despite this insect's medical importance, especially in Madagascar where plague is endemic, little is known about the organization of its natural populations. We undertook population genetic analyses (i) to determine the spatial genetic structure of X. cheopis in Madagascar and (ii) to determine the potential risk of plague introduction in the neighboring island of Mayotte. RESULTS: We genotyped 205 fleas from 12 sites using nine microsatellite markers...
July 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28724450/variation-in-species-composition-and-infection-rates-of-anopheles-mosquitoes-at-different-altitudinal-transects-and-the-risk-of-malaria-in-the-highland-of-dirashe-woreda-south-ethiopia
#4
Taye Yohannes Daygena, Fekadu Massebo, Bernt Lindtjørn
BACKGROUND: The transmission of malaria is heterogeneous, and varies due to altitude. The information on whether the transmission of malaria is indigenous or imported to highland areas is scarce. Therefore, this study aimed to assess the species composition and infection rates of Anopheles at different altitudinal transects, and the risk of malaria if any in the highland of Dirashe Woreda, South Ethiopia. METHODS: This study was conducted in Gato (low altitude; average elevation of 1273 m), Onota (mid-altitude; average elevation of 1707 m) and Layignaw-Arguba (high altitude; average elevation of 2337 m) from August 2015 to April 2016...
July 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28724448/systemic-insecticide-treatment-of-the-canine-reservoir-of-trypanosoma-cruzi-induces-high-levels-of-lethality-in-triatoma-infestans-a-principal-vector-of-chagas-disease
#5
Ariel Loza, Adrianna Talaga, Gladys Herbas, Ruben Jair Canaviri, Thalia Cahuasiri, Laura Luck, Alvaro Guibarra, Raquel Goncalves, Juan Antonio Pereira, Sonia A Gomez, Albert Picado, Louisa Alexandra Messenger, Caryn Bern, Orin Courtenay
BACKGROUND: Despite large-scale reductions in Chagas disease prevalence across Central and South America, Trypanosoma cruzi infection remains a considerable public health problem in the Gran Chaco region where vector-borne transmission persists. In these communities, peridomestic animals are major blood-meal sources for triatomines, and household presence of infected dogs increases T. cruzi transmission risk for humans. To address the pressing need for field-friendly, complementary methods to reduce triatomine infestation and interrupt T...
July 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28724438/synergy-between-dinotefuran-and-fipronil-against-the-cat-flea-ctenocephalides-felis-improved-onset-of-action-and-residual-speed-of-kill-in-adult-cats
#6
Romain Delcombel, Hamadi Karembe, Bakela Nare, Audrey Burton, Julian Liebenberg, Josephus Fourie, Marie Varloud
BACKGROUND: The cat flea, Ctenocephalides felis felis (C. felis), is a cosmopolitan hematophagous ectoparasite, and is considered to be the most prevalent flea species in both Europe and the USA. Clinical signs frequently associated with flea bites include pruritus, dermatitis and in severe cases even pyodermatitis and alopecia. Ctenocephalides felis is also a vector for several pathogens and is an intermediate host for the cestode Dipylidium caninum. Treatment of cats with a fast-acting pulicide, that is persistently effective in protecting the animal against re-infestation, is therefore imperative to their health...
July 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28724402/a-dual-colour-fluorescence-in-situ-hybridization-fish-assay-for-identifying-the-zoonotic-malaria-parasite-plasmodium-knowlesi-with-a-potential-application-for-the-specific-diagnosis-of-knowlesi-malaria-in-peripheral-level-laboratories-of-southeast-asia
#7
Jyotsna Shah, Akhila Poruri, Olivia Mark, Urmila Khadilka, Franziska Mohring, Robert W Moon, Ranjan Ramasamy
BACKGROUND: Plasmodium knowlesi is primarily responsible for zoonotic malaria in several Southeast Asian countries. Precise identification of the parasite in the blood of patients presently relies on an expensive and elaborate PCR procedure because microscopic examination of blood and other available field identification techniques lack adequate specificity. Therefore, the use of a simple and inexpensive dual-colour fluorescence in situ hybridization (FISH) assay, analogous to FISH assays recently described for Plasmodium falciparum and Plasmodium vivax, was investigated as a potential tool for identifying P...
July 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28720125/profiling-of-the-perturbed-metabolomic-state-of-mouse-spleen-during-acute-and-chronic-toxoplasmosis
#8
Xiao-Qing Chen, Chun-Xue Zhou, Hany M Elsheikha, Shuai He, Gui-Xue Hu, Xing-Quan Zhu
BACKGROUND: Toxoplasma gondii, a common opportunistic protozoan, is a leading cause of illness and mortality among immunosuppressed individuals and during congenital infections. Current therapeutic strategies for toxoplasmosis are not fully effective at curtailing disease progression in these cases. Given the parasite ability to influence host immunity and metabolism, understanding of the metabolic alterations in the host's immune organs during T. gondii infection may enhance the understanding of the molecular mechanisms that define the pathophysiology of T...
July 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28720113/evaluation-of-electric-nets-as-means-to-sample-mosquito-vectors-host-seeking-on-humans-and-primates
#9
Frances Hawkes, Benny Obrain Manin, Sui Han Ng, Stephen J Torr, Chris Drakeley, Tock H Chua, Heather M Ferguson
BACKGROUND: Plasmodium knowlesi is found in macaques and is the only major zoonotic malaria to affect humans. Transmission of P. knowlesi between people and macaques depends on the host species preferences and feeding behavior of mosquito vectors. However, these behaviours are difficult to measure due to the lack of standardized methods for sampling potential vectors attracted to different host species. This study evaluated electrocuting net traps as a safe, standardised method for sampling P...
July 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28720110/molecular-characterisation-of-protist-parasites-in-human-habituated-mountain-gorillas-gorilla-beringei-beringei-humans-and-livestock-from-bwindi-impenetrable-national-park-uganda
#10
Matthew J Nolan, Melisa Unger, Yuen-Ting Yeap, Emma Rogers, Ilary Millet, Kimberley Harman, Mark Fox, Gladys Kalema-Zikusoka, Damer P Blake
BACKGROUND: Over 60 % of human emerging infectious diseases are zoonotic, and there is growing evidence of the zooanthroponotic transmission of diseases from humans to livestock and wildlife species, with major implications for public health, economics, and conservation. Zooanthroponoses are of relevance to critically endangered species; amongst these is the mountain gorilla (Gorilla beringei beringei) of Uganda. Here, we assess the occurrence of Cryptosporidium, Cyclospora, Giardia, and Entamoeba infecting mountain gorillas in the Bwindi Impenetrable National Park (BINP), Uganda, using molecular methods...
July 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28716154/new-insights-from-gorongosa-national-park-and-niassa-national-reserve-of-mozambique-increasing-the-genetic-diversity-of-trypanosoma-vivax-and-trypanosoma-vivax-like-in-tsetse-flies-wild-ungulates-and-livestock-from-east-africa
#11
Carla Mf Rodrigues, Herakles A Garcia, Adriana C Rodrigues, André G Costa-Martins, Carlos L Pereira, Dagmar L Pereira, Zakaria Bengaly, Luis Neves, Erney P Camargo, Patrick B Hamilton, Marta Mg Teixeira
BACKGROUND: Trypanosoma (Duttonella) vivax is a major pathogen of livestock in Africa and South America (SA), and genetic studies limited to small sampling suggest greater diversity in East Africa (EA) compared to both West Africa (WA) and SA. METHODS: Multidimensional scaling and phylogenetic analyses of 112 sequences of the glycosomal glyceraldehyde phosphate dehydrogenase (gGAPDH) gene and 263 sequences of the internal transcribed spacer of rDNA (ITS rDNA) were performed to compare trypanosomes from tsetse flies from Gorongosa National Park and Niassa National Reserve of Mozambique (MZ), wild ungulates and livestock from EA, and livestock isolates from WA and SA...
July 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28709468/il-32%C3%AE-promotes-the-healing-of-murine-cutaneous-lesions-caused-by-leishmania-braziliensis-infection-in-contrast-to-leishmania-amazonensis
#12
Rodrigo Saar Gomes, Muriel Vilela Teodoro Silva, Jéssica Cristina Dos Santos, Lucas Luiz de Lima Silva, Aline Carvalho Batista, Juliana Reis Machado, Mauro Martins Teixeira, Miriam Leandro Dorta, Milton Adriano Pelli de Oliveira, Charles A Dinarello, Leo A B Joosten, Fátima Ribeiro-Dias
BACKGROUND: Interleukin 32 (IL-32) is a pro-inflammatory cytokine induced in patients with American tegumentary leishmaniasis (ATL) caused by Leishmania braziliensis. Here, we investigated whether IL-32 is also expressed in patient lesions caused by L. amazonensis. In addition, we evaluated experimental L. amazonensis and L. braziliensis infections in C57BL/6 transgenic mice for human IL-32γ (IL-32γTg) in comparison with wild-type (WT) mice that do not express the IL-32 gene. RESULTS: Human cutaneous lesions caused by L...
July 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28705248/prevention-of-feline-leishmaniosis-with-an-imidacloprid-10-flumethrin-4-5-polymer-matrix-collar
#13
Emanuele Brianti, Luigi Falsone, Ettore Napoli, Gabriella Gaglio, Salvatore Giannetto, Maria Grazia Pennisi, Vito Priolo, Maria Stefania Latrofa, Viviana Domenica Tarallo, Fabrizio Solari Basano, Roberto Nazzari, Katrin Deuster, Matthias Pollmeier, Laura Gulotta, Vito Colella, Filipe Dantas-Torres, Gioia Capelli, Domenico Otranto
BACKGROUND: Leishmaniosis caused by Leishmania infantum is one of the most important vector-borne diseases affecting animals and humans worldwide. Dogs are considered main reservoirs of the zoonotic forms, though in the last years the role of cats as reservoirs has been increasingly investigated. Feline leishmaniosis (FeL) occurs in endemic areas and no specific preventive measures have been investigated so far. In this study the efficacy of a 10% imidacloprid/4.5% flumethrin polymer matrix collar, licensed for tick and flea prevention, has been assessed against FeL in a longitudinal study on 204 privately owned cats from the Aeolian islands (Sicily), an area highly endemic for the disease...
July 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28705183/generic-amplification-and-next-generation-sequencing-reveal-crimean-congo-hemorrhagic-fever-virus-ap92-like-strain-and-distinct-tick-phleboviruses-in-anatolia-turkey
#14
Ender Dinçer, Annika Brinkmann, Olcay Hekimoğlu, Sabri Hacıoğlu, Katalin Földes, Zeynep Karapınar, Pelin Fatoş Polat, Bekir Oğuz, Özlem Orunç Kılınç, Peter Hagedorn, Nurdan Özer, Aykut Özkul, Andreas Nitsche, Koray Ergünay
BACKGROUND: Ticks are involved with the transmission of several viruses with significant health impact. As incidences of tick-borne viral infections are rising, several novel and divergent tick- associated viruses have recently been documented to exist and circulate worldwide. This study was performed as a cross-sectional screening for all major tick-borne viruses in several regions in Turkey. Next generation sequencing (NGS) was employed for virus genome characterization. Ticks were collected at 43 locations in 14 provinces across the Aegean, Thrace, Mediterranean, Black Sea, central, southern and eastern regions of Anatolia during 2014-2016...
July 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28705255/filarioid-infections-in-wild-carnivores-a-multispecies-survey-in-romania
#15
Angela Monica Ionică, Ioana Adriana Matei, Gianluca D'Amico, Jana Ababii, Aikaterini Alexandra Daskalaki, Attila D Sándor, Dorin Valter Enache, Călin Mircea Gherman, Andrei Daniel Mihalca
BACKGROUND: Filarioids are vector-borne parasitic nematodes of vertebrates. In Europe, eight species of filarioids, including zoonotic species, have been reported mainly in domestic dogs, and occasionally in wild carnivores. In Romania, infections with Dirofilaria spp. and Acanthocheilonema reconditum are endemic in domestic dogs. Despite the abundant populations of wild carnivores in the country, their role in the epidemiology of filarioid parasites remains largely unknown. The aim of the present study was to assess the host range, prevalence and distribution of filarioid infections in wild carnivores present in Romania...
July 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28705245/abscisic-acid-induces-a-transient-shift-in-signaling-that-enhances-nf-%C3%AE%C2%BAb-mediated-parasite-killing-in-the-midgut-of-anopheles-stephensi-without-reducing-lifespan-or-fecundity
#16
Elizabeth K K Glennon, Brandi K Torrevillas, Shannon F Morrissey, Jadrian M Ejercito, Shirley Luckhart
BACKGROUND: Abscisic acid (ABA) is naturally present in mammalian blood and circulating levels can be increased by oral supplementation. We showed previously that oral ABA supplementation in a mouse model of Plasmodium yoelii 17XNL infection reduced parasitemia and gametocytemia, spleen and liver pathology, and parasite transmission to the mosquito Anopheles stephensi fed on these mice. Treatment of cultured Plasmodium falciparum with ABA at levels detected in our model had no effects on asexual growth or gametocyte formation in vitro...
July 13, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28701194/characterization-and-productivity-profiles-of-aedes-aegypti-l-breeding-habitats-across-rural-and-urban-landscapes-in-western-and-coastal-kenya
#17
Harun N Ngugi, Francis M Mutuku, Bryson A Ndenga, Peter S Musunzaji, Joel O Mbakaya, Peter Aswani, Lucy W Irungu, Dunstan Mukoko, John Vulule, Uriel Kitron, Angelle D LaBeaud
BACKGROUND: Aedes aegypti, the principal vector for dengue and other emerging arboviruses, breeds preferentially in various man-made and natural container habitats. In the absence of vaccine, epidemiological surveillance and vector control remain the best practices for preventing dengue outbreaks. Effective vector control depends on a good understanding of larval and adult vector ecology of which little is known in Kenya. In the current study, we sought to characterize breeding habitats and establish container productivity profiles of Ae...
July 12, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28701176/angiostrongylus-vasorum-in-romania-an-extensive-survey-in-red-foxes-vulpes-vulpes
#18
Georgiana Deak, Călin M Gherman, Angela M Ionică, Alexandru D Vezendan, Gianluca D'Amico, Ioana A Matei, Aikaterini A Daskalaki, Ionuț Marian, Aurel Damian, Vasile Cozma, Andrei D Mihalca
BACKGROUND: Angiostrongylus vasorum is the causative agent of canine angiostrongylosis, a severe snail-borne disease of dogs. Red foxes are important natural reservoirs of infection, and surveys of foxes provide a more objective picture of the parasite distribution. Our aim was to investigate the possibility of the presence of A. vasorum in red foxes from the western part of Romania and to analyse the risk factors related to the sex, age and geographic origin of the foxes. Between July 2016 and April 2017, 567 hunted red foxes from 10 counties of western Romania were examined by necropsy for the presence of lungworms...
July 12, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28697801/interferon-%C3%AE-dependent-control-of-anaplasma-phagocytophilum-by-murine-neutrophil-granulocytes
#19
Kathrin Gussmann, Susanne Kirschnek, Friederike D von Loewenich
BACKGROUND: Anaplasma phagocytophilum is a Gram-negative obligate intracellular bacterium that is transmitted by ticks of the Ixodes ricinus complex. It replicates in neutrophils and elicits febrile disease in humans and animals. Because of its striking tropism for neutrophils, A. phagocytophilum has been used as a model organism to study the immune response against obligate intracellular pathogens. In mice, the control of A. phagocytophilum in the early phase of infection is dependent on natural killer cell-derived interferon-γ (IFN-γ)...
July 12, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28697811/effect-of-an-intervention-in-storm-drains-to-prevent-aedes-aegypti-reproduction-in-salvador-brazil
#20
Raquel Lima Souza, Vánio André Mugabe, Igor Adolfo Dexheimer Paploski, Moreno S Rodrigues, Patrícia Sousa Dos Santos Moreira, Leile Camila Jacob Nascimento, Christopher Michael Roundy, Scott C Weaver, Mitermayer Galvão Reis, Uriel Kitron, Guilherme Sousa Ribeiro
BACKGROUND: Aedes aegypti, the principal vector for dengue, chikungunya and Zika viruses, is a synanthropic species that uses stagnant water to complete its reproductive cycle. In urban settings, rainfall water draining structures, such as storm drains, may retain water and serve as a larval development site for Aedes spp. reproduction. Herein, we describe the effect of a community-based intervention on preventing standing water accumulation in storm drains and their consequent infestation by adult and immature Ae...
July 11, 2017: Parasites & Vectors
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