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https://www.readbyqxmd.com/read/29032768/molluscicidal-effect-of-achyranthes-aspera-l-amaranthaceae-aqueous-extract-on-adult-snails-of-biomphalaria-pfeifferi-and-lymnaea-natalensis
#1
Belayhun Mandefro, Seid Tiku Mereta, Yinebeb Tariku, Argaw Ambelu
BACKGROUND: Intestinal schistosomiasis caused by Schistosoma mansoni is a wide spread disease in most parts of Ethiopian highlands. Snail control is one major strategy in schistosomiasis control. The use of molluscicidal plant products is becoming interesting due to their environmental friendliness, accessibility and easy application. This research is aimed to evaluate the molluscicidal effect of Achyranthes aspera on Biomphalaria pfeifferi and Lymnaea natalensis snails, which are of great medical and veterinary importance in Ethiopia...
October 16, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/29017937/combined-treatment-of-biomphalaria-glabrata-infected-by-schistosoma-mansoni-with-oxamniquine-and-praziquantel-reproductive-histological-and-metabolic-aspects
#2
Rebecca Nespoli Lima, Paulo Marcos Zech Coelho, Ana Carolina A Mattos, Clélia Christina Mello Silva, Ronaldo de Carvalho Augusto, Ester Maria Mota, Samaly de Souza, Georgia Correa Atella, Suellen Silva Cabral, George Eduardo Gabriel Kluck, Marta Julia Faro
No abstract text is available yet for this article.
October 7, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/29017583/mapping-freshwater-snails-in-north-western-angola-distribution-identity-and-molecular-diversity-of-medically-important-taxa
#3
Fiona Allan, Jose Carlos Sousa-Figueiredo, Aidan M Emery, Rossely Paulo, Clara Mirante, Alfredo Sebastião, Miguel Brito, David Rollinson
BACKGROUND: This study was designed to determine the distribution and identity of potential intermediate snail hosts of Schistosoma spp. in Bengo, Luanda, Kwanza Norte and Malanje Provinces in north-western Angola. This is an area where infection with Schistosoma haematobium, causing urogenital schistosomiasis, is common but little is yet known about transmission of the disease. Angola has had a varied past with regard to disease control and is revitalising efforts to combat neglected tropical diseases...
October 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28994007/impact-of-moringa-oleifera-seed-aqueous-extract-on-some-biological-biochemical-and-histological-aspects-of-biomphalaria-alexandrina-snails
#4
Amina M Ibrahim, Aboelfetoh M Abdalla
Schistosomiasis is one of the neglected tropical diseases. It is a snail-borne trematode infection, and Biomphalaria alexandrina snails are the intermediate host of Schistosoma mansoni in Egypt. The objective of this study is to evaluate the molluscicidal activity of the aqueous seed extract of Moringa oleifera against B. alexandrina snails. The results showed that this aqueous extract was lethal for B. alexandrina snails (LC50 0.27 g/l; LC90 0.41 g/l). Exposure of snails to the sublethal concentrations of this aqueous extract caused a considerable reduction in survival rates and hatchability rates of eggs of these snails...
October 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28951760/a-new-technique-using-low-volumes-a-new-technique-to-assess-the-molluscicidal-activity-using-low-volumes
#5
José Augusto Albuquerque Santos, Viviane Paixão Cavalcante, Leonardo da Silva Rangel, João Claudio Vitória Atico Leite, Robson Xavier Faria
Schistosomiasis is a disease endemic in several states of Brazil. The population control of the transmitter mollusks is done with Bayluscide WP 70®, in the control programs. OMS preconize molluscicidal assays using Becker with 500 mL of final volume, restringing the number of natural products and synthetic drugs to be tested in function of high quantity of material necessary. A new technique to assess the toxic effects for Biomphalaria sp. is the purpose of this work, for developing adaptation for this aquatic organism, using a low volume of test solution in 24-well plates...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28832617/molluscicidal-activities-of-curcumin-nisin-polylactic-acid-nanoparticle-on-biomphalaria-pfeifferi
#6
Michael E Omobhude, Olajumoke A Morenikeji, Oyetunde T Oyeyemi
BACKGROUND: Snail intermediate host control is a widely canvassed strategy for schistosomiasis control in endemic countries. While there have been increasing studies on the search for potent molluscicides in the past years, the use of nanoparticulate agents as molluscicides is yet to gain wide attention. The aim of this study was to assess the molluscicidal potential of curcumin-nisin poly lactic acid (PLA) entrapped nanoparticle (CurNisNp) against Biomphalaria pfeifferi, a snail intermediate host for Schistosoma mansoni...
August 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28803793/schistosomiasis-from-a-snail-s-perspective-advances-in-snail-immunity
#7
REVIEW
Emmanuel A Pila, Hongyu Li, Jacob R Hambrook, Xinzhong Wu, Patrick C Hanington
The snail's immune response is an important determinant of schistosome infection success, acting in concert with host, parasite, and environmental factors. Coordinated by haemocytes and humoral factors, it possesses immunological hallmarks such as pattern recognition receptors, and predicted gastropod-unique factors like the immunoglobulin superfamily domain-containing fibrinogen-related proteins. Investigations into mechanisms that underpin snail-schistosome compatibility have advanced quickly, contributing functional insight to many observational studies...
August 11, 2017: Trends in Parasitology
https://www.readbyqxmd.com/read/28802946/effects-of-experimental-angiostrongylus-cantonensis-infection-on-the-reproductive-biology-of-biomphalaria-straminea-and-biomphalaria-tenagophila
#8
Mariana G Lima, Vinícius M Tunholi-Alves, Tatiane Cristina S Bonfim, Fabrício N Gaudêncio, Juberlan S Garcia, Arnaldo Maldonado, Jairo Pinheiro, Silvana C Thiengo
Eosinophilic meningoencephalitis is an endemic zoonosis in Southeast Asia and the Pacific Islands, but in recent years, new cases have been reported in various countries outside these regions, including Brazil, where it is considered an emerging disease. In this study, the effect of infection by the nematode Angiostrongylus cantonensis, one of the main etiologic agent of this disease, on the reproductive biology of the planorbid snails Biomphalaria straminea and B. tenagophila was investigated during the pre-patent period...
August 9, 2017: Journal of Invertebrate Pathology
https://www.readbyqxmd.com/read/28800079/challenging-the-metallothionein-mt-gene-of-biomphalaria-glabrata-unexpected-response-patterns-due-to-cadmium-exposure-and-temperature-stress
#9
Michael Niederwanger, Martin Dvorak, Raimund Schnegg, Veronika Pedrini-Martha, Katharina Bacher, Massimo Bidoli, Reinhard Dallinger
Metallothioneins (MTs) are low-molecular-mass, cysteine-rich, metal binding proteins. In most animal species, they are involved in metal homeostasis and detoxification, and provide protection from oxidative stress. Gastropod MTs are highly diversified, exhibiting unique features and adaptations like metal specificity and multiplications of their metal binding domains. Here, we show that the MT gene of Biomphalaria glabrata, one of the largest MT genes identified so far, is composed in a unique way. The encoding for an MT protein has a three-domain structure and a C-terminal, Cys-rich extension...
August 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28793917/molluscicidal-activity-and-mechanism-of-toxicity-of-a-novel-salicylanilide-ester-derivative-against-biomphalaria-species
#10
Ping He, Weisi Wang, Benjamin Sanogo, Xin Zeng, Xi Sun, Zhiyue Lv, Dongjuan Yuan, Liping Duan, Zhongdao Wu
BACKGROUND: Schistosomiasis mansoni is one of the most important, but often neglected, tropical diseases transmitted by snails of the genus Biomphalaria. Control of the intermediate host snail plays a crucial role in preventing the spread of schistosomiasis. However, there is only one molluscicide, niclosamide, recommended by the World Health Organization. Niclosamide has been used for several decades but is toxic to non-target organisms. Therefore, it is necessary to optimize the scaffold of niclosamide and develop novel molluscicides with enhanced potency and decreased toxicity to non-target organisms...
August 10, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28769640/molecular-and-morphological-identification-of-biomphalaria-species-from-the-state-of-s%C3%A3-o-paulo-brazil
#11
Raquel Gardini Sanches Palasio, Marisa Cristina de Almeida Guimarães, Fernanda Pires Ohlweiler, Roseli Tuan
DNA barcoding and morphological characters were used to identify adult snails belonging to the genus Biomphalaria from 17 municipalities in the state of São Paulo, Brazil. The DNA barcode analysis also included twenty-nine sequences retrieved from GenBank. The final data set of 104 sequences of the mitochondrial cytochrome oxidase I (COI) gene was analyzed for K2P intraspecific and interspecific divergences, through tree-reconstruction methods (Neighbor-Joining, Maximum Likelihood and Bayesian inference), and by applying different models (ABGD, bPTP, GMYC) to partition the sequences according to the pattern of genetic variation...
2017: ZooKeys
https://www.readbyqxmd.com/read/28766154/the-comparative-effect-of-chlorine-and-huwa-san-as-disinfecting-agents-on-biomphalaria-alexandrina-snails-and-free-larval-stages-of-schistosoma-mansoni
#12
Sara S M Sayed, Marwa T A Abdel-Wareth
Many chemicals are applied for disinfecting purposes. Although chlorination is the most common procedure, it has many drawbacks. So there becomes an urgent need for new chemicals which are both effective and less harmful to other water fauna. The present work aims at investigating the comparative effects of chlorine and Huwa-san as a new disinfectant on Biomphalaria alexandrina snails which act as bioindicators of toxicity, besides evaluating their miracicidal and cercaricidal activities. The results showed that Huwa-san was more toxic on tested snails than chlorine, where the LC50 values were 21 and 1368...
August 2, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28754250/molecular-context-of-schistosoma-mansoni-transmission-in-the-molluscan-environments-a-mini-review
#13
REVIEW
Damilare Olatunji Famakinde
Schistosoma mansoni, being transmitted by some freshwater Biomphalaria snails, is a major causative agent of human schistosomiasis. In the absence of effective vaccine and alternative drug designs to fight against the disease, and with the limitations of molluscicide application, developing more efficient strategies to interrupt the snail-mediated parasite transmission is being emphasized as potentially instrumental in the efforts toward schistosomiasis elimination, hence, necessitating thorough and comprehensive understanding of the fundamental mechanisms involved in the transmission process...
December 2017: Acta Tropica
https://www.readbyqxmd.com/read/28743308/distribution-and-current-infection-status-of-biomphalaria-straminea-in-hong-kong
#14
Xin Zeng, Wing Chung Yiu, Kwan Ho Cheung, Ho Yin Yip, Wenyan Nong, Ping He, Dongjuan Yuan, David Rollinson, Jian-Wen Qiu, Ming Chiu Fung, Zhongdao Wu, Jerome Ho Lam Hui
BACKGROUND: Schistosomiasis, also generally known as snail fever, is a parasitic disease caused by trematode flatworms of the genus Schistosoma. In Hong Kong and mainland China, the freshwater snail Biomphalaria straminea has been introduced and has the potential to transmit intestinal schistosomiasis caused by S. mansoni, a parasite of man which has a wide distribution in Africa and parts of the New World, especially Brazil. The first identification of B. straminea in Hong Kong dates back to the 1970s, and its geographical distribution, phylogenetic relationships, and infection status have not been updated for more than 30 years...
July 25, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28719649/differential-expression-of-small-rna-pathway-genes-associated-with-the-biomphalaria-glabrata-schistosoma-mansoni-interaction
#15
Fábio Ribeiro Queiroz, Luciana Maria Silva, Wander de Jesus Jeremias, Élio Hideo Babá, Roberta Lima Caldeira, Paulo Marcos Zech Coelho, Matheus de Souza Gomes
The World Health Organization (WHO) estimates that approximately 240 million people in 78 countries require treatment for schistosomiasis, an endemic disease caused by trematodes of the genus Schistosoma. In Brazil, Schistosoma mansoni is the only species representative of the genus whose passage through an invertebrate host, snails of the genus Biomphalaria, is obligatory before infecting a mammalian host, including humans. The availability of the genome and transcriptome of B. glabrata makes studying the regulation of gene expression, particularly the regulation of miRNA and piRNA processing pathway genes, possible...
2017: PloS One
https://www.readbyqxmd.com/read/28708450/a-comparison-of-kenyan-biomphalaria-pfeifferi-and-b-sudanica-as-vectors-for-schistosoma-mansoni-including-a-discussion-of-the-need-to-better-understand-the-effects-of-snail-breeding-systems-on-transmission
#16
Martin Mutuku, Lijun Lu, Fredrick Otiato, Ibrahim Ndungu Mwangi, Joseph Mutonga Kinuthia, Geoffrey Murai Maina, Martina Rose Laidemitt, Eric Agola Lelo, Horace Ochanda, Eric Samuel Loker, Gerald Mwandori Mkoji
In Kenya, schistosomes infect an estimated 6 million people with >30 million people at risk of infection. We compared compatibility with, and ability to support and perpetuate, Schistosoma mansoni of Biomphalaria pfeifferi and Biomphalaria sudanica, 2 prominent freshwater snail species involved in schistosomiasis transmission in Kenya. Field-derived B. pfeifferi (from a stream in Mwea, central Kenya) and B. sudanica (from Nawa, Lake Victoria, in western Kenya) were exposed to S. mansoni miracidia isolated from fecal samples of naturally infected humans from Mwea or Nawa...
July 14, 2017: Journal of Parasitology
https://www.readbyqxmd.com/read/28685186/the-protein-pheromone-temptin-is-an-attractant-of-the-gastropod-biomphalaria-glabrata
#17
Emmanuel A Pila, Shauna J Peck, Patrick C Hanington
The freshwater snail Biomphalaria glabrata has drawn much research interest by virtue of it being one of the intermediate hosts of the parasitic flatworm Schistosoma mansoni, a causative agent of human schistosomiasis. Schistosomiasis is a chronic disease that affects over 260 million people globally, particularly in tropical and sub-tropical regions. One strategy that has been proposed as a way to prevent human infection by the parasite, involves the use of pheromone traps to lure the snail host away from areas of human activity...
July 6, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28684706/biomphalaria-glabrata-metallothionein-lacking-metal-specificity-of-the-protein-and-missing-gene-upregulation-suggest-metal-sequestration-by-exchange-instead-of-through-selective-binding
#18
Michael Niederwanger, Sara Calatayud, Oliver Zerbe, Sílvia Atrian, Ricard Albalat, Mercè Capdevila, Òscar Palacios, Reinhard Dallinger
The wild-type metallothionein (MT) of the freshwater snail Biomphalaria glabrata and a natural allelic mutant of it in which a lysine residue was replaced by an asparagine residue, were recombinantly expressed and analyzed for their metal-binding features with respect to Cd(2+), Zn(2+) and Cu⁺, applying spectroscopic and mass-spectrometric methods. In addition, the upregulation of the Biomphalaria glabrataMT gene was assessed by quantitative real-time detection PCR. The two recombinant proteins revealed to be very similar in most of their metal binding features...
July 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28681306/aquatic-ecotoxicity-of-ashes-from-brazilian-savanna-wildfires
#19
Darlan Q Brito, Carlos José S Passos, Daphne H F Muniz, Eduardo C Oliveira-Filho
In a global scenario of climate change, several studies have predicted an increase in fires in different parts of the world. With the occurrence of rains following the fires in the Brazilian savanna (Cerrado biome), the compounds present in ashes may enter aquatic environments and cause adverse effects to these ecosystems. In this context, this study evaluated the potential toxicity of ashes from two areas of Cerrado and an area of pasture, through ecotoxicological bioassays and using three aquatic species from distinct trophic levels, which were exposed to different dilutions of ashes: the microcrustacean Ceriodaphnia dubia, the fish Danio rerio and the mollusc Biomphalaria glabrata...
July 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28659165/longitudinal-survey-on-the-distribution-of-biomphalaria-sudanica-and-b-choanomophala-in-mwanza-region-on-the-shores-of-lake-victoria-tanzania-implications-for-schistosomiasis-transmission-and-control
#20
Anouk N Gouvras, Fiona Allan, Safari Kinung'hi, Muriel Rabone, Aidan Emery, Teckla Angelo, Tom Pennance, Bonnie Webster, Honest Nagai, David Rollinson
BACKGROUND: Schistosomiasis is hyper-endemic in the Lake Victoria basin; with intestinal schistosomiasis plaguing communities adjacent to the lake, where the intermediate host snails live. The two intermediate host species of Schistosoma mansoni in the Mwanza region are Biomphalaria sudanica, found on the banks of the lakes, and B. choanomphala, found in the lake itself. There are few longitudinal surveys documenting changing abundance and differential transmission patterns of these Biomphalaria snails across seasons and years...
June 28, 2017: Parasites & Vectors
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