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https://www.readbyqxmd.com/read/28427478/morphological-and-molecular-characteristics-of-malayfilaria-sofiani-uni-mat-udin-takaoka-n-g-n-sp-nematoda-filarioidea-from-the-common-treeshrew-tupaia-glis-diard-duvaucel-mammalia-scandentia-in-peninsular-malaysia
#1
Shigehiko Uni, Ahmad Syihan Mat Udin, Takeshi Agatsuma, Weerachai Saijuntha, Kerstin Junker, Rosli Ramli, Hasmahzaiti Omar, Yvonne Ai-Lian Lim, Sinnadurai Sivanandam, Emilie Lefoulon, Coralie Martin, Daicus Martin Belabut, Saharul Kasim, Muhammad Rasul Abdullah Halim, Nur Afiqah Zainuri, Subha Bhassu, Masako Fukuda, Makoto Matsubayashi, Masashi Harada, Van Lun Low, Chee Dhang Chen, Narifumi Suganuma, Rosli Hashim, Hiroyuki Takaoka, Mohd Sofian Azirun
BACKGROUND: The filarial nematodes Wuchereria bancrofti (Cobbold, 1877), Brugia malayi (Brug, 1927) and B. timori Partono, Purnomo, Dennis, Atmosoedjono, Oemijati & Cross, 1977 cause lymphatic diseases in humans in the tropics, while B. pahangi (Buckley & Edeson, 1956) infects carnivores and causes zoonotic diseases in humans in Malaysia. Wuchereria bancrofti, W. kalimantani Palmieri, Pulnomo, Dennis & Marwoto, 1980 and six out of ten Brugia spp. have been described from Australia, Southeast Asia, Sri Lanka and India...
April 20, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28303006/short-course-high-dose-rifampicin-achieves-wolbachia-depletion-predictive-of-curative-outcomes-in-preclinical-models-of-lymphatic-filariasis-and-onchocerciasis
#2
Ghaith Aljayyoussi, Hayley E Tyrer, Louise Ford, Hanna Sjoberg, Nicolas Pionnier, David Waterhouse, Jill Davies, Joanne Gamble, Haelly Metugene, Darren A N Cook, Andrew Steven, Raman Sharma, Ana F Guimaraes, Rachel H Clare, Andrew Cassidy, Kelly L Johnston, Laura Myhill, Laura Hayward, Samuel Wanji, Joseph D Turner, Mark J Taylor, Stephen A Ward
Lymphatic filariasis (LF) and onchocerciasis are priority neglected tropical diseases targeted for elimination. The only safe drug treatment with substantial curative activity against the filarial nematodes responsible for LF (Brugia malayi, Wuchereria bancrofti) or onchocerciasis (Onchocerca volvulus) is doxycycline. The target of doxycycline is the essential endosymbiont, Wolbachia. Four to six weeks doxycycline therapy achieves >90% depletion of Wolbachia in worm tissues leading to blockade of embryogenesis, adult sterility and premature death 18-24 months post-treatment...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28126543/lessons-from-the-genomes-and-transcriptomes-of-filarial-nematodes
#3
Alexandra Grote, Sara Lustigman, Elodie Ghedin
Human filarial infections are a leading cause of morbidity in the developing world. While a small arsenal of drugs exists to treat these infections, there remains a tremendous need for the development of additional interventions. Recent genome sequences and transcriptome analyses of filarial nematodes have provided novel biological insight and allowed for the prediction of novel drug targets as well as potential vaccine candidates. In this review, we discuss the currently available data, insights gained into the metabolism of these organisms, and how the filaria field can move forward by leveraging these data...
January 23, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28118850/humans-from-wuchereria-bancrofti-endemic-area-elicit-substantial-immune-response-to-proteins-of-the-filarial-parasite-brugia-malayi-and-its-endosymbiont-wolbachia
#4
Ruchi Jha, Mamta Gangwar, Dhanvantri Chahar, Anand Setty Balakrishnan, Mahendra Pal Singh Negi, Shailja Misra-Bhattacharya
BACKGROUND: In the past, immune responses to several Brugia malayi immunodominant antigens have been characterized in filaria-infected populations; however, little is known regarding Wolbachia proteins. We earlier cloned and characterized few B. malayi (trehalose-6-phosphate phosphatase, Bm-TPP and heavy chain myosin, BmAF-Myo) and Wolbachia (translation initiation factor-1, Wol Tl IF-1 and NAD(+)-dependent DNA ligase, wBm-LigA) proteins and investigated the immune responses, which they triggered in animal models...
January 24, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28030352/characterization-of-immunoreactive-proteins-of-setaria-cervi-isolated-by-preparative-polyacrylamide-gel-electrophoresis
#5
Priyanka Priyadarshi, Piyush Dravid, Inayat Hussain Sheikh, Sunita Saxena, Ashish Tandon, Deep C Kaushal, Shakir Ali, Nuzhat A Kaushal
Filarial parasites are complex mixtures of antigenic proteins and characterization of these antigenic molecules is essential to identify the diagnostically important filaria-specific antigens. In the present study, we have fractionated the somatic extracts from adults of Setaria cervi (bovine filarial parasite) on preparative SDS-polyacrylamide gel electrophoresis and tested the immunoreactivity of the separated gel fractions with polyclonal antibodies against filarial excretory-secretory antigens as well as filarial patients sera...
March 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28004792/nod2-dependent-neutrophil-recruitment-is-required-for-early-protective-immune-responses-against-infectious-litomosoides-sigmodontis-l3-larvae
#6
Jesuthas Ajendra, Sabine Specht, Sebastian Ziewer, Andrea Schiefer, Kenneth Pfarr, Marijo Parčina, Thomas A Kufer, Achim Hoerauf, Marc P Hübner
Nucleotide-binding oligomerization domain-containing protein 2 (NOD2) recognizes muramyl dipeptide (MDP) of bacterial cell walls, triggering NFκB-induced pro-inflammation. As most human pathogenic filariae contain Wolbachia endobacteria that synthesize the MDP-containing cell wall precursor lipid II, NOD2's role during infection with the rodent filaria Litomosoides sigmodontis was investigated. In NFκB reporter-cells, worm-extract containing Wolbachia induced NOD2 and NOD1. NOD2-deficient mice infected with L...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27923052/filariae-retrovirus-co-infection-in-mice-is-associated-with-suppressed-virus-specific-igg-immune-response-and-higher-viral-loads
#7
Kirsten Katrin Dietze, Ulf Dittmer, Daniel Karim Koudaimi, Simone Schimmer, Martina Reitz, Minka Breloer, Wiebke Hartmann
Worldwide more than 2 billion people are infected with helminths, predominantly in developing countries. Co-infections with viruses such as human immunodeficiency virus (HIV) are common due to the geographical overlap of these pathogens. Helminth and viral infections induce antagonistic cytokine responses in their hosts. Helminths shift the immune system to a type 2-dominated immune response, while viral infections skew the cytokine response towards a type 1 immune response. Moreover, chronic helminth infections are often associated with a generalized suppression of the immune system leading to prolonged parasite survival, and also to a reduced defence against unrelated pathogens...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27828973/immunization-with-brugia-malayi-myosin-as-heterologous-dna-prime-protein-boost-induces-protective-immunity-against-b-malayi-infection-in-mastomys-coucha
#8
Jyoti Gupta, Sweta Misra, Shailja Misra-Bhattacharya
The current control strategies employing chemotherapy with diethylcarbamazine, ivermectin and albendazole have reduced transmission in some filaria-endemic areas, there is growing interest for complementary approaches, such as vaccines especially in light of threat of parasite developing resistance to mainstay drugs. We earlier demonstrated recombinant heavy chain myosin of B. malayi (Bm-Myo) as a potent vaccine candidate whose efficacy was enhanced by heterologous DNA prime/protein boost (Myo-pcD+Bm-Myo) vaccination in BALB/c mice...
2016: PloS One
https://www.readbyqxmd.com/read/27790964/increased-igg-antibody-responses-to-excretory-secretory-antigens-in-neonates-born-from-mothers-infected-with-filarial-nematodes
#9
K G Achary, M S Bal, N N Mandal, A K Satapathy
The present investigation aimed to evaluate the extent to which maternal filarial infection influences IgG subclass immune responses in the cord blood of neonates. Prevalence of antigenaemia was detected using an Og4C3 assay. Filaria-specific IgG subclasses against excretory/secretory antigens were measured by ELISA. Transplacental transfer of circulating filarial antigen (CFA) was observed from 34.8% of CFA-positive mothers to their respective cord bloods. Filaria-specific IgG1, IgG2 and IgG4 responses were significantly higher among cord bloods of infected mothers compared to cord bloods of uninfected mothers...
October 28, 2016: Journal of Helminthology
https://www.readbyqxmd.com/read/27529747/the-effects-of-ivermectin-on-brugia-malayi-females-in-vitro-a-transcriptomic-approach
#10
Cristina Ballesteros, Lucienne Tritten, Maeghan O'Neill, Erica Burkman, Weam I Zaky, Jianguo Xia, Andrew Moorhead, Steven A Williams, Timothy G Geary
BACKGROUND: Lymphatic filariasis and onchocerciasis are disabling and disfiguring neglected tropical diseases of major importance in developing countries. Ivermectin is the drug of choice for mass drug administration programs for the control of onchocerciasis and lymphatic filariasis in areas where the diseases are co-endemic. Although ivermectin paralyzes somatic and pharyngeal muscles in many nematodes, these actions are poorly characterized in adult filariae. We hypothesize that paralysis of pharyngeal pumping by ivermectin in filariae could result in deprivation of essential nutrients, especially iron, inducing a wide range of responses evidenced by altered gene expression, changes in metabolic pathways, and altered developmental states in embryos...
August 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27417080/finding-wolbachia-in-filarial-larvae-and-culicidae-mosquitoes-in-upper-egypt-governorate
#11
Ahmed K Dyab, Lamia A Galal, Abeer E Mahmoud, Yasser Mokhtar
Wolbachia is an obligatory intracellular endosymbiotic bacterium, present in over 20% of all insects altering insect reproductive capabilities and in a wide range of filarial worms which is essential for worm survival and reproduction. In Egypt, no available data were found about Wolbachia searching for it in either mosquitoes or filarial worms. Thus, we aimed to identify the possible concurrent presence of Wolbachia within different mosquitoes and filarial parasites, in Assiut Governorate, Egypt using multiplex PCR...
June 2016: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/27408801/gray-fox-urocyon-cinereoargenteus-parasite-diversity-in-central-mexico
#12
Norma Hernández-Camacho, Raúl Francisco Pineda-López, María de Jesús Guerrero-Carrillo, Germinal Jorge Cantó-Alarcón, Robert Wallace Jones, Marco Antonio Moreno-Pérez, Juan Joel Mosqueda-Gualito, Salvador Zamora-Ledesma, Brenda Camacho-Macías
Mexico has a long history of parasitological studies in communities of vertebrates. However, the mega diversity of the country makes fauna inventories an ongoing priority. Presently, there is little published on the parasite fauna of gray foxes (Urocyon cinereoargenteus Schereber, 1775) and this study provides new records of parasites for gray foxes in central Mexico. It is a continuation of a series of previous parasitological studies conducted with this carnivore in Mexico from 2003 to the present. A total of 24 foxes in the Parque Nacional El Cimatario (PANEC) were trapped, anaesthetized, and parasites recovered...
August 2016: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/27392244/phenylethylchromones-with-in-vitro-antitumor-promoting-activity-from-aquilaria-filaria
#13
Airi Suzuki, Katsunori Miyake, Yohei Saito, Faradiba Abdul Rasyid, Harukuni Tokuda, Misa Takeuchi, Nobutaka Suzuki, Eiichiro Ichiishi, Tetsuo Fujie, Masuo Goto, Yohei Sasaki, Kyoko Nakagawa-Goto
A new chromone, 2-(2-hydroxy-2-phenylethyl)chromone (1), was isolated together with ten known phenylethyl chromones from MeOH extracts of agarwood (Aquilaria filaria). The selected compounds were evaluated in an antiproliferative assay against five human tumor cell lines, including a multidrug-resistant cell line. They were also tested for antitumor promoting activity, as mediated by 12-O-tetradecanoylphorbol-13-acetate-induced activation of the Epstein-Barr virus early antigen in Raji cells. Among all compounds, 4',7-dimethyoxy-6-hydroxychromone (2) displayed broad spectrum antiproliferative activity against all tumor cell lines tested with IC50 values of 25-38 µM, while 8 was selectively inhibitory against multidrug-resistant cells...
February 2017: Planta Medica
https://www.readbyqxmd.com/read/27357128/exposure-to-vector-borne-pathogens-in-candidate-blood-donor-and-free-roaming-dogs-of-northeast-italy
#14
Marta Vascellari, Silvia Ravagnan, Antonio Carminato, Stefania Cazzin, Erika Carli, Graziana Da Rold, Laura Lucchese, Alda Natale, Domenico Otranto, Gioia Capelli
BACKGROUND: Many vector-borne pathogens including viruses, bacteria, protozoa and nematodes occur in northeast Italy, representing a potential threat to animal and human populations. Little information is available on the circulation of the above vector-borne pathogens in dogs. This work aims to (i) assess exposure to and circulation of pathogens transmitted to dogs in northeast Italy by ticks, sandflies, and mosquitoes, and (ii) drive blood donor screening at the newly established canine blood bank of the Istituto Zooprofilattico Sperimentale delle Venezie...
June 29, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27322330/mobile-diagnostics-based-on-motion-a-close-look-at-motility-patterns-in-the-schistosome-life-cycle
#15
Ewert Linder, Sami Varjo, Cecilia Thors
Imaging at high resolution and subsequent image analysis with modified mobile phones have the potential to solve problems related to microscopy-based diagnostics of parasitic infections in many endemic regions. Diagnostics using the computing power of "smartphones" is not restricted by limited expertise or limitations set by visual perception of a microscopist. Thus diagnostics currently almost exclusively dependent on recognition of morphological features of pathogenic organisms could be based on additional properties, such as motility characteristics recognizable by computer vision...
2016: Diagnostics
https://www.readbyqxmd.com/read/27273645/associations-between-helminth-infections-plasmodium-falciparum-parasite-carriage-and-antibody-responses-to-sexual-and-asexual-stage-malarial-antigens
#16
Ulysse Ateba-Ngoa, Sophie Jones, Jeannot Fréjus Zinsou, Josiane Honkpehedji, Ayola Akim Adegnika, Jean-Claude Dejon Agobe, Marguerite Massinga-Loembe, Benjamin Mordmüller, Teun Bousema, Maria Yazdanbakhsh
Infections with helminths and Plasmodium spp. overlap in their geographical distribution. It has been postulated that helminth infections may influence malarial transmission by altering Plasmodium falciparum gametocytogenesis. This cross-sectional study assessed the effect of helminth infections on P. falciparum gametocyte carriage and on humoral immune responses to sexual stage antigens in Gabon. Schistosoma haematobium and filarial infections as well as P. falciparum asexual forms and gametocyte carriage were determined...
August 3, 2016: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/27270389/vector-borne-pathogens-in-dogs-and-red-foxes-from-the-federal-state-of-brandenburg-germany
#17
Jana M Liesner, Jürgen Krücken, Roland Schaper, Stefan Pachnicke, Barbara Kohn, Elisabeth Müller, Christoph Schulze, Georg von Samson-Himmelstjerna
Dirofilaria repens is endemic in eastern and southern European regions but was recently found in Germany in dogs, mosquitoes and one human patient. Since some of the positive dog and mosquito samples were collected in Brandenburg, it was aimed to systematically assess the prevalence of D. repens and other canine vector-borne pathogens in Brandenburg. Dog owners also received a questionnaire and were asked to provide more information about the dogs including travel history. In total, 1023 dog blood samples as well as 195 fox spleen and 179 fox blood samples were collected...
July 15, 2016: Veterinary Parasitology
https://www.readbyqxmd.com/read/27174667/rhizome-extracts-of-curcuma-zedoaria-rosc-induce-caspase-dependant-apoptosis-via-generation-of-reactive-oxygen-species-in-filarial-parasite-setaria-digitata-in%C3%A2-vitro
#18
K S Senathilake, E H Karunanayake, S R Samarakoon, K H Tennekoon, E D de Silva
Human lymphatic filariasis (LF) is mainly caused by filarial parasite Wuchereria bancrofti and is the second leading cause of long term and permanent disability in tropical countries. To date, incapability to eliminate long lived adult parasites by current drugs remains the major challenge in the elimination of LF. Hence, in the current study, the efficacy of rhizome extracts of Curcuma zedoaria (a plant traditionally used in Sri Lanka in the management of LF) was evaluated as an effective filaricide in vitro...
August 2016: Experimental Parasitology
https://www.readbyqxmd.com/read/27163575/occurrence-of-mansonella-ozzardi-diagnosed-using-a-polycarbonate-membrane-in-a-riverside-population-of-l%C3%A3-brea-in-the-western-brazilian-amazon
#19
Sergio de Almeida Basano, Jansen Fernandes Medeiros, Gilberto Fontes, Gabriel de Deus Vieira, Juliana Souza de Almeida Aranha Camargo, Luana Janaína Souza Vera, Ricardo de Godoi Mattos Ferreira, Luís Marcelo Aranha Camargo
INTRODUCTION Mansonella ozzardi is a widely distributed filaria worm in the Amazon region. This study aimed to determine the prevalence of M. ozzardi infection in riverine communities of Lábrea municipality, Amazonas State, Brazil. METHODS A diagnostic blood filtration method in a polycarbonate membrane was used. RESULTS M. ozzardi was found in 50.3% of the sample, with the highest prevalence in farmers/fishermen (69.4%; χ 2 = -19.14, p<0.001). The prevalence was higher in longer-term residents (≥11 years; 60...
February 2016: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/27160085/molecular-detection-of-leishmania-infantum-filariae-and-wolbachia-spp-in-dogs-from-southern-portugal
#20
Carla Maia, Laura Altet, Lorena Serrano, José Manuel Cristóvão, Maria Dolores Tabar, Olga Francino, Luís Cardoso, Lenea Campino, Xavier Roura
BACKGROUND: Leishmaniosis caused by the protozoan Leishmania infantum and dirofilariosis caused by the nematodes Dirofilaria immitis or Dirofilaria repens are vector-borne zoonoses widely present in the Mediterranean basin. In addition, some studies reported that the endosymbiont Wolbachia spp. play a role in the biology and pathogenesis of filarial parasites. The aim of this work was to evaluate the frequency of mono- and co-infections by L. infantum, filariae and Wolbachia spp. and their association with clinical signs in dogs from the south of Portugal...
May 10, 2016: Parasites & Vectors
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