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https://www.readbyqxmd.com/read/28350867/dissociation-between-skin-test-reactivity-and-anti-aeroallergen-ige-determinants-among-urban-brazilian-children
#1
Neuza M Alcantara-Neves, Rafael V Veiga, João C M Ponte, Sérgio S da Cunha, Silvia M Simões, Álvaro A Cruz, Maria Yazdanbakhsh, Sheila M Matos, Thiago Magalhães Silva, Camila A Figueiredo, Lain C Pontes-de-Carvalho, Laura C Rodrigues, Rosemeire L Fiaccone, Philip J Cooper, Maurício L Barreto
BACKGROUND: The dissociation between specific IgE and skin prick test reactivity to aeroallergens, a common finding in populations living in low and middle-income countries, has important implications for the diagnosis and treatment of allergic diseases. Few studies have investigated the determinants of this dissociation. In the present study, we explored potential factors explaining this dissociation in children living in an urban area of Northeast Brazil, focusing in particular on factors associated with poor hygiene...
2017: PloS One
https://www.readbyqxmd.com/read/28346536/water-sanitation-and-hygiene-wash-and-environmental-risk-factors-for-soil-transmitted-helminth-intensity-of-infection-in-timor-leste-using-real-time-pcr
#2
Suzy J Campbell, Susana V Nery, Rebecca Wardell, Catherine A D'Este, Darren J Gray, James S McCarthy, Rebecca J Traub, Ross M Andrews, Stacey Llewellyn, Andrew J Vallely, Gail M Williams, Archie C A Clements
BACKGROUND: No investigations have been undertaken of risk factors for intensity of soil-transmitted helminth (STH) infection in Timor-Leste. This study provides the first analysis of risk factors for intensity of STH infection, as determined by quantitative PCR (qPCR), examining a broad range of water, sanitation and hygiene (WASH) and environmental factors, among communities in Manufahi District, Timor-Leste. METHODS: A baseline cross-sectional survey of 18 communities was undertaken as part of a cluster randomised controlled trial, with additional identically-collected data from six other communities...
March 27, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28342825/association-between-parasitic-infections-and-tuberculin-skin-test-results-in-refugees
#3
Nathaniel S Watts, Mucho M Mizinduko, Elizabeth D Barnett, Laura F White, Natasha S Hochberg
BACKGROUND: Parasitic infections are known to modulate the immune response necessary for controlling Mycobacterium tuberculosis infection. We sought to investigate species-specific effects of parasite infection on M. tuberculosis infection. METHODS: As part of the Refugee Health Assessment Program, stool examinations and tuberculin skin testing were performed on refugees seen at Boston Medical Center between 1995 and 2012. Tuberculin skin test (TST) and stool examination data were collected for 6669 refugees; 3349 (50...
March 22, 2017: Travel Medicine and Infectious Disease
https://www.readbyqxmd.com/read/28342673/therapeutic-use-of-bacillus-thuringiensis-in-the-treatment-of-psoroptic-mange-in-naturally-infested-new-zealand-rabbits
#4
Emmanuel Dunstand-Guzmán, Claudia Hallal-Calleros, Jorge Morales-Montor, Víctor Manuel Hernández-Velázquez, Juan José Zárate-Ramos, Kurt L Hoffman, Guadalupe Peña-Chora, Fernando Iván Flores-Pérez
Bacillus thuringiensis is a bacteria known for its bioinsecticidal toxins and it has been proposed as an alternative in the treatment of several parasites that infect domestic animals (helminths, ticks, mites). In this work, we evaluated the clinical efficiency of the Bacillus thuringiensis GP532 strain in the treatment of six rabbits naturally infested with the P. cuniculi mite. GP532 extract (10mg/ml) was applied by aspersion in both pinna, with a second application after seven days, and the therapeutic effect was measured in both qualitative and quantitative manner...
March 9, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28342671/apoptosis-of-peritoneal-leucocytes-during-early-stages-of-fasciola-hepatica-infections-in-sheep
#5
A Escamilla, R Pérez-Caballero, R Zafra, M J Bautista, I L Pacheco, M T Ruiz, M S Martínez-Cruz, A Martínez-Moreno, V Molina-Hernández, J Pérez
Several immunomodulatory properties have been described in Fasciola hepatica infections. Apoptosis has been shown to be an effective mechanism to avoid the immune response in helminth infections. The aim of the present work was to study apoptosis in peritoneal leucocytes of sheep experimentally infected with F. hepatica during the early stages of infection. Five groups (n=5) of sheep were used. Groups 2-5 were orally infected with 200 metacercariae (mc) and sacrificed at 1, 3, 9 and 18days post-infection (dpi), respectively...
March 18, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28342137/skewed-exposure-to-environmental-antigens-complements-hygiene-hypothesis-in-explaining-the-rise-of-allergy
#6
Wilfried Allaerts, Tse Wen Chang
The Hygiene Hypothesis has been recognized as an important cornerstone to explain the sudden increase in the prevalence of asthma and allergic diseases in modernized culture. The recent epidemic of allergic diseases is in contrast with the gradual implementation of Homo sapiens sapiens to the present-day forms of civilization. This civilization forms a gradual process with cumulative effects on the human immune system, which co-developed with parasitic and commensal Helminths. The clinical manifestation of this epidemic, however, became only visible in the second half of the twentieth century...
March 24, 2017: Acta Biotheoretica
https://www.readbyqxmd.com/read/28341675/investigating-enterobius-vermicularis-as-a-novel-surrogate-of-helminth-ova-presence-in-tertiary-wastewater-treatment-plants
#7
Sydney P Rudko, Norma J Ruecker, Nicholas J Ashbolt, Norman F Neumann, Patrick C Hanington
Significant effort has gone into assessing the fate and removal of viruses, bacteria and protozoan parasites during wastewater treatment to provide data addressing potential health risks associated with reuse options. Comparatively less is known about the fate of parasitic worm ova species in these complex systems. It is largely assumed that these helminths settle and are removed with the sludge, and consequently represent a relatively low risk for wastewater reuse applications. However, helminths are a highly diverse group of organisms that display a wide range of physical properties that complicate the application of a single performance expectation for helminth reduction during wastewater treatment...
March 24, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28340144/preventive-chemotherapy-in-one-year-reduces-by-over-80-the-number-of-individuals-with-soil-transmitted-helminthiases-causing-morbidity-results-from-meta-analysis
#8
Chiara Marocco, Mathieu Bangert, Serene A Joseph, Christopher Fitzpatrick, Antonio Montresor
The morbidity due to Ascaris lumbricoides and Trichuris trichiura is caused by infections of moderate and heavy intensity while hookworm infections of all intensities are recognized to cause morbidity.This study aims to evaluate the effect of repeated rounds of preventive chemotherapy on the proportion of soil-transmitted helminth (STH) infections causing morbidity. We identified studies from 17 countries, reporting changes in the proportion of STH infection causing morbidity between baseline and follow-up...
March 18, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28336271/helminth-secretomes-reflect-different-lifestyles-and-parasitized-hosts
#9
Yesid Cuesta-Astroz, Francislon Silva de Oliveira, Laila Alves Nahum, Guilherme Oliveira
Helminths cause a number of medical and agricultural problems and are a major cause of parasitic infections in humans, animals and plants. Comparative analysis of helminth genes and genomes are important to understand the genomic biodiversity and evolution of parasites and their hosts in terms of different selective pressures in their habitats. The interactions between the infective organisms and their hosts are mediated in large part by secreted proteins, known collectively as the "secretome". Proteins secreted by parasites are able to modify a host's environment and modulate their immune system...
March 20, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28336269/epidemiology-of-polyparasitism-with-taenia-solium-schistosomes-and-soil-transmitted-helminths-in-the-co-endemic-village-of-malanga-democratic-republic-of-congo
#10
Joule Madinga, Katja Polman, Kirezi Kanobana, Lisette van Lieshout, Eric Brienen, Nicolas Praet, Constantin Kabwe, Sarah Gabriël, Pierre Dorny, Pascal Lutumba, Niko Speybroeck
Helminth co-infections are common in sub-Saharan Africa. However, little is known about the distribution and determinants of co-infections with Taenia solium taeniasis/cysticercosis. Building on a previous community-based study on human cysticercosis in Malanga village, we investigated co-infections with Taenia solium, soil-transmitted helminths (STHs) and Schistosoma spp and associated risk factors in a random subsample of 330 participants. Real time PCR assays were used to detect DNA of soil-transmitted helminths (STHs), T...
March 20, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28334040/macrophage-origin-limits-functional-plasticity-in-helminth-bacterial-co-infection
#11
Dominik Rückerl, Sharon M Campbell, Sheelagh Duncan, Tara E Sutherland, Stephen J Jenkins, James P Hewitson, Tom A Barr, Lucy H Jackson-Jones, Rick M Maizels, Judith E Allen
Rapid reprogramming of the macrophage activation phenotype is considered important in the defense against consecutive infection with diverse infectious agents. However, in the setting of persistent, chronic infection the functional importance of macrophage-intrinsic adaptation to changing environments vs. recruitment of new macrophages remains unclear. Here we show that resident peritoneal macrophages expanded by infection with the nematode Heligmosomoides polygyrus bakeri altered their activation phenotype in response to infection with Salmonella enterica ser...
March 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28333957/immune-response-of-rats-vaccinated-orally-with-various-plant-expressed-recombinant-cysteine-proteinase-constructs-when-challenged-with-fasciola-hepatica-metacercariae
#12
Malgorzata Kesik-Brodacka, Agnieszka Lipiec, Monika Kozak Ljunggren, Luiza Jedlina, Katarzyna Miedzinska, Magdalena Mikolajczak, Andrzej Plucienniczak, Andrzej B Legocki, Halina Wedrychowicz
BACKGROUND: Cysteine proteinases of Fasciola hepatica are important candidates for vaccine antigens because of their role in fluke biology and host-parasite relationships. In our previous experiments, we found that a recombinant cysteine proteinase cloned from adult F. hepatica (CPFhW) can protect rats against liver fluke infections when it is administered intramuscularly or intranasally in the form of cDNA. We also observed considerable protection upon challenge following mucosal vaccination with inclusion bodies containing recombinant CPFhW produced in Escherichia coli...
March 23, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28331385/annotated-checklist-of-fish-cestodes-from-south-america
#13
Philippe V Alves, Alain de Chambrier, Tomáš Scholz, José L Luque
An exhaustive literature search supplemented by a critical examination of records made it possible to present an annotated checklist of tapeworms (Cestoda) that, as adults or larvae (metacestodes), parasitize freshwater, brackish water and marine fishes, i.e. cartilaginous and bony fishes, in South America. The current knowledge of their species diversity, host associations and geographical distribution is reviewed. Taxonomic problems are discussed based on a critical evaluation of the literature and information on DNA sequences of individual taxa is provided to facilitate future taxonomic and phylogenetic studies...
2017: ZooKeys
https://www.readbyqxmd.com/read/28331224/enhanced-wnt-signalling-in-hepatocytes-is-associated-with-schistosoma-japonicum-infection-and-contributes-to-liver-fibrosis
#14
Qi Wang, Xin Chou, Fei Guan, Zhengming Fang, Shengjun Lu, Jiahui Lei, Yonglong Li, Wenqi Liu
Liver fibrosis is the most serious pathology caused by Schistosoma japonicum infection, which arises when schistosome eggs are deposited in the liver. Eosinophils, macrophages and hepatic stellate cells (HSCs) have been identified as major cellular contributors to the development of granulomas and fibrosis, but little is known about the effects of hepatocytes on granuloma formation. Here, we found that the levels of Wnt signalling-related molecules, transforming growth factor β (TGF-β) and connective tissue growth factor (CTGF) in hepatocytes were markedly elevated after S...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28330806/a-fish-model-for-the-study-of-the-relationship-between-neuroendocrine-and-immune-cells-in-the-intestinal-epithelium-silurus-glanis-infected-with-a-tapeworm
#15
B Sayyaf Dezfuli, J A DePasquale, G Castaldelli, L Giari, G Bosi
Immunohistochemical, immunofluorescence and ultrastructural studies were conducted on a sub-population of 20 wels catfish Silurus glanis from a tributary of the River Po (Northern Italy). Fish were examined for the presence of ecto- and endo-parasites; in the intestine of 5 fish, 11 specimens of cestode Glanitaenia osculata were noted and was the only helminth species encountered. The architecture of intestine and its cellular features were nearly identical in either the uninfected S. glanis or in those harboring G...
March 19, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28330485/prevalence-of-helminth-and-coccidian-parasites-in-swedish-outdoor-cats-and-the-first-report-of-aelurostrongylus-abstrusus-in-sweden-a-coprological-investigation
#16
Giulio Grandi, Arianna Comin, Osama Ibrahim, Roland Schaper, Ulrika Forshell, Eva Osterman Lind
BACKGROUND: This study was performed in order to gather recent epidemiological data on feline endoparasites in Swedish cats. Faecal samples from 205 outdoor cats were collected by their owners and submitted to the National Veterinary Institute for analysis. The study population was comprised of cats with access to an outdoor environment and with no history of anthelmintic treatment within the last 3 months. Intestinal parasites were detected with a centrifugal flotation technique and Baermann larval sedimentation was performed to detect metastrongylid lungworms...
March 23, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28327881/feline-platynosomiasis-analysis-of-the-association-of-infection-levels-with-pathological-and-biochemical-findings
#17
Dirceu Guilherme de Souza Ramos, Amanda Raiza Gonçalves Lima Oliveira Santos, Leodil da Costa Freitas, Ísis Assis Braga, Erica Pereira da Silva, Luciana Maria Curtio Soares, Nádia Aline Bobbi Antoniassi, Fernando Henrique Furlan, Richard de Campos Pacheco
Platynosomiasis is a common feline hepatic disease caused by Platynosomum fastosum (Trematoda - Dicrocoelidae), which is also known as 'lizard poisoning'. Most reports of feline platynosomiasis show that this disease is sporadic and manifests with uncommon lesions; its pathogenicity is still not well understood. This study aimed to describe liver injuries and enzymatic changes associated with natural P. fastosum infection in 47 stray cats in an endemic area. Overall, 38.3% (18/47) of cats were parasitized, and 2,358 flukes (P...
March 16, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28327791/a-tale-of-two-neglected-tropical-infections-using-gis-to-assess-the-spatial-and-temporal-overlap-of-schistosomiasis-and-leprosy-in-a-region-of-minas-gerais-brazil
#18
David Alexander Phillips, José Antonio Ferreira, Deidra Ansah, Herica Sa Teixeira, Uriel Kitron, Thelma de Filippis, Marcelo H de Alcântara, Jessica K Fairley
BACKGROUND: Despite public health efforts to reduce the global burden of leprosy, gaps remain in the knowledge surrounding transmission of infection. Helminth co-infections have been associated with a shift towards the lepromatous end of the disease spectrum, potentially increasing transmission in co-endemic areas. OBJECTIVES: Using this biologically plausible association, we conducted a geographic information systems (GIS) study to investigate the spatial associations of schistosomiasis and leprosy in an endemic area of Minas Gerais (MG), Brazil...
April 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28325173/patterns-and-processes-influencing-helminth-parasites-of-arctic-coastal-communities-during-climate-change
#19
K V Galaktionov
This review analyses the scarce available data on biodiversity and transmission of helminths in Arctic coastal ecosystems and the potential impact of climate changes on them. The focus is on the helminths of seabirds, dominant parasites in coastal ecosystems. Their fauna in the Arctic is depauperate because of the lack of suitable intermediate hosts and unfavourable conditions for species with free-living larvae. An increasing proportion of crustaceans in the diet of Arctic seabirds would result in a higher infection intensity of cestodes and acanthocephalans, and may also promote the infection of seabirds with non-specific helminths...
March 22, 2017: Journal of Helminthology
https://www.readbyqxmd.com/read/28322211/prey-species-of-franciscana-pontoporia-blainvillei-as-paratenic-hosts-of-helminths
#20
Tony Silveira, Mariana H Remião, Ricardo B Robaldo, Kaio Freitas, Ana Luísa S Valente
The distribution of franciscana Pontoporia blainvillei Gervais & d'Orbigny, 1884, is restricted to the estuarine and coastal waters of the southwestern Atlantic. The diet of this dolphin is composed of fishes, squids, and shrimps, many of which harbor helminths that may infect franciscana. Larval forms of the trematode Synthesium pontoporiae and the acanthocephalan Bolbosoma turbinella have been recorded in franciscana; however, they have not yet been identified in any of the prey species of this cetacean. We evaluated 3 components of the diet of franciscana as possible transmission sources of parasitiasis...
March 21, 2017: Diseases of Aquatic Organisms
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