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Anaïs Portet, Richard Galinier, Silvain Pinaud, Julien Portela, Fanny Nowacki, Benjamin Gourbal, David Duval
Insect thioester-containing protein (iTEP) is the most recently defined group among the thioester-containing protein (TEP) superfamily. TEPs are key components of the immune system, and iTEPs from flies and mosquitoes were shown to be major immune weapons. Initially characterized from insects, TEP genes homologous to iTEP were further described from several other invertebrates including arthropods, cniderians, and mollusks albeit with few functional characterizations. In the freshwater snail Biomphalaria glabrata , a vector of the schistosomiasis disease, the presence of a TEP protein (BgTEP) was previously described in a well-defined immune complex involving snail lectins (fibrinogen-related proteins) and schistosome parasite mucins (SmPoMuc)...
2018: Frontiers in Immunology
Hiroki Maeda, Takeshi Hatta, Daigo Tsubokawa, Fusako Mikami, Toshiyuki Nishimaki, Takeshi Nakamura, Anisuzzaman, Makoto Matsubayashi, Motoyuki Ogawa, Clarissa Prazeres da Costa, Naotoshi Tsuji
Parasite-induced behavioral changes in their hosts favor to complete the lifecycle of parasites. Schistosome infection is also known to cause physiological changes in infected freshwater snail intermediate hosts. Here, we report, a novel phenomenon in which Schistosoma mansoni, a highly debilitating worm affecting millions of people worldwide, alters the phototropic behavior of Biomphalaria glabrata, the vector snail. S. mansoni-infection enhanced positive phototropism of vector snails and infected snails spent significantly more time in light...
June 9, 2018: Parasitology International
Hallysson Douglas Andrade de Araújo, Luanna Ribeiro Dos Santos Silva, Williams Nascimento de Siqueira, Caíque Silveira Martins da Fonseca, Nicácio Henrique da Silva, Ana Maria Mendonça de Albuquerque Melo, Mônica Cristina Barroso Martins, Vera Lúcia de Menezes Lima
This text presents complementary data corresponding to schistosomiasis mansoni's vector control and enviromental toxicity using usnic acid. These informations support our research article "Toxicity of Usnic Acid from Cladonia substellata (Lichen) to embryos and adults of Biomphalaria glabrata " by Araújo et al. [1], and focuses on the analysis of the detailed data regarding the different concentrations of Usnic Acid and their efficiency to B. glabrata mortality and non-viability, as also to environmental toxicity, evaluated by A...
April 2018: Data in Brief
Ya Yang, Wanting Cheng, Xiaoying Wu, Shaoyu Huang, Zhuohui Deng, Xin Zeng, Dongjuan Yuan, Yu Yang, Zhongdao Wu, Yue Chen, Yibiao Zhou, Qingwu Jiang
BACKGROUND: Schistosomiasis is a snail-borne parasitic disease and is endemic in many tropical and subtropical countries. Biomphalaria straminea, an intermediate host for Schistosoma mansoni, is native to the southeastern part of South America and has established in other regions of South America, Central America and southern China during the last decades. S. mansoni is endemic in Africa, the Middle East, South America and the Caribbean. Knowledge of the potential global distribution of this snail is essential for risk assessment, monitoring, disease prevention and control...
May 29, 2018: PLoS Neglected Tropical Diseases
Huang Tao, Guo Yun-Hai, Liu He-Xiang, Zhang Yi
OBJECTIVE: To establish a method for the quantitative determination of serotonin and dopamine in the nervous system of Biomphalaria glabrata by using ultra high performance liquid chromatography-tandem quadrupole mass spectrometry (UPLC MS/MS) . METHODS: The B. glabrata nervous system was broken in the pure methanol solution after obtaining it by dissecting with microscope. Then, the supernatant containing the target substance after twice high speed centrifugation was got...
April 19, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Judith E Humphries, Laura E Deneckere
No abstract text is available yet for this article.
September 2018: Developmental and Comparative Immunology
Si-Ming Zhang, Lijing Bu, Martina R Laidemitt, Lijun Lu, Martin W Mutuku, Gerald M Mkoji, Eric S Loker
Using high throughput Illumina sequencing technology, we determined complete sequences for the mitochondrial genome (mitogenome) and nuclear ribosomal DNA (rDNA) complex for three African freshwater snail taxa within the genus Biomphalaria, B. pfeifferi, B. sudanica and B. choanomphala, and for two laboratory strains of B. glabrata originating from the Neotropics. Biomphalaria snails are obligate vectors of the blood fluke Schistosoma mansoni, a major etiologic agent of human intestinal schistosomiasis. Our data show that mitogenomes from African and Neotropical Biomphalaria are highly conserved...
May 9, 2018: Scientific Reports
Weisi Wang, Qiang Mao, Junmin Yao, Weijia Yang, Qiming Zhang, Wencheng Lu, Zhuohui Deng, Liping Duan
BACKGROUND: The snail Biomphalaria straminea is one of the intermediate hosts of Schistosoma mansoni. Biomphalaria straminea is also an invasive species, known for its strong capability on peripheral expansion, long-distance dispersal and colonization. Using molluscicides to control snail populations is an important strategy to interrupt schistosomiasis transmission and to prevent the spread of the invasive species. In this study, a series of pyridylphenylurea derivatives were synthesized as potential molluscicides...
May 9, 2018: Parasites & Vectors
Taíssa Alice Soledade Calasans, Geza Thais Rangel Souza, Claudia Moura Melo, Rubens Riscala Madi, Verónica de Lourdes Sierpe Jeraldo
Schistosomiasis, which is caused by trematodes of the genus Schistosoma and by the species Schistosoma mansoni in Brazil, is transmitted primarily by Biomphalaria glabrata mollusks. Infections occur in humans and mollusks in freshwater environments contaminated with feces from infected humans. This study aimed to evaluate potential foci of schistosomiasis based on the identification of infection sites for the snails, factors that increased the human infection probability of S. mansoni infection, and the relationship of the disease with abiotic, biotic, and sociocultural factors...
2018: PloS One
Chester Kalinda, Moses J Chimbari, Samson Mukaratirwa
BACKGROUND: The speedy rate of change in the environmental and socio-economics factors may increase the incidence, prevalence and risk of schistosomiasis infections in Zambia. However, available information does not provide a comprehensive understanding of the biogeography and distribution of the disease, ecology and population dynamics of intermediate host snails. The current study used an information-theoretical approach to understand the biogeography and prevalence schistosomiasis and identified knowledge gaps that would be useful to improve policy towards surveillance and eradication of intermediate hosts snails in Zambia...
April 30, 2018: Infectious Diseases of Poverty
John Sullivan
Several genes have recently been shown to affect the innate resistance of laboratory strains of Biomphalaria glabrata to infection with Schistosoma mansoni, including Hsp90, expression of which following a brief exposure to elevated temperature can interfere with resistance in juvenile BS-90 snails. Because a prior study failed to see a similar effect in adult snails, juvenile BS-90 snails were exposed to 10 or 50 miracidia following a 4.5 to 6-hr incubation at 33 C or 37 C. Snails were then monitored for production of secondary sporocysts or release of cercariae...
May 8, 2018: Journal of Parasitology
Muhammad A Alsherbiny, Shymaa A El Badawy, Hesham Elbedewy, Shahira M Ezzat, Fatma S Elsakhawy, Mostafa A Abdel-Kawy
Schistosomiasis is the most noteworthy parasitic disease after malaria. Furthermore, the significant activity of the genus Solanum against Schistosoma worms and its intermediate host snails reinforced the study of Solanum seaforthianum Andr. (SS) and Solanum macrocarpon L. (SM) for their molluscicidal and schistosomicidal potentiality. In this study, different extracts, fractions and isolated compounds of both Solanum species are evaluated for the molluscicidal and schistosomicidal potentialities. The niclosamide was used as positive molluscicide control against Biomphalaria alexandrina snails...
January 2018: Pharmacognosy Research
Euan R O Allan, Jacob A Tennessen, Thomas J Sharpton, Michael S Blouin
Freshwater snails are the intermediate hosts for numerous parasitic worms which can have negative consequences for human health and agriculture. Understanding the transmission of these diseases requires a more complete characterization of the immunobiology of snail hosts. This includes the characterization of its microbiome and genetic factors which may interact with this important commensal community. Allelic variation in the Guadeloupe Resistance Complex (GRC) genomic region of Guadeloupean Biomphalaria glabrata influences their susceptibility to schistosome infection, and may have other roles in the snail immune response...
March 16, 2018: Journal of Heredity
Nathalia Ferreira David, Selma Patrícia Diniz Cantanhede, Natanael Bezerra Monroe, Luciana Patrícia Lima Alves Pereira, Nêuton Silva-Souza, Ana Lúcia Abreu-Silva, Verônica Maria de Oliveira, Ligia Tchaicka
Two of the three vector species of Schistosoma mansoni Sambon, 1907 in Brazil occur in the state of Maranhão: Biomphalaria glabrata (Say, 1818) and Biomphalaria straminea (Dunker, 1848). For the implementation of effective measures to combat schistosomiasis, it is necessary to identify the spatial and seasonal dynamics of these snails. Therefore, this work brought together information from malacological survey carried out in São Luís (Maranhão, Brazil) to identify the spatial and seasonal distribution patterns of Biomphalaria spp...
May 2018: Parasitology Research
Paul G Cantalupo, James M Pipas
We present the complete genome sequence of a virus found in raw sewage collected in Pittsburgh, PA, USA. Pittsburgh sewage-associated virus 1 (PSAV1) encodes one large open reading frame with conserved domains typically found in the Picornavirales order of viruses. PSAV1 is closely related to Biomphalaria virus 2 (BV2).
March 15, 2018: Genome Announcements
Alvine C Kengne-Fokam, Hugues C Nana-Djeunga, Mohamed Bagayan, Flobert Njiokou
BACKGROUND: Intestinal schistosomiasis due to Schistosoma mansoni was mapped in Cameroon in the 1990s and preventive chemotherapy launched since 2005. A situation analysis conducted in 2011 revealed an increase in schistosomiasis transmission, especially in the equatorial part of the country, despite the fact that Biomphalaria pfeifferi, the main intermediate host of this parasite, is now scarce in many foci. Biomphalaria camerunensis, restricted to the equatorial part of the country, is considered as a less suitable host for S...
March 13, 2018: Parasites & Vectors
Javier Gandasegui, Pedro Fernández-Soto, Antonio Muro, Constança Simões Barbosa, Fabio Lopes de Melo, Rodrigo Loyo, Elainne Christine de Souza Gomes
BACKGROUND: In Brazil, schistosomiasis is a parasitic disease of public health relevance, mainly in poor areas where Schistosoma mansoni is the only human species encountered and Biomphalaria straminea is one of the intermediate host snails. A nested-PCR based on a specific mitochondrial S. mansoni minisatellite DNA region has been successfully developed and applied as a reference method in Brazil for S. mansoni detection, mainly in host snails for epidemiological studies. The amplification efficiency of LAMP is known to be higher than PCR...
March 2018: PLoS Neglected Tropical Diseases
Min Feng-Yang, Wang Jia-Sheng, Xu Xing-Jian, Zhou Jian-Yin, Chen Li-Zhen
OBJECTIVE: To understand the eco-hydraulics characteristics of Biomphalaria straminea , the intermediate host of Schistosoma mansoni . METHODS: The drainage method and settlement tube method were applied to measure B. straminea 's density and hydrostatic settling velocity respectively. RESULTS: The density of B. straminea was 1.04-1.16 g/cm3 , and the average value was 1.08 g/cm3 . The hydrostatic settling velocity was 2.32-12.92 cm/s. CONCLUSIONS: The eco-hydraulics characteristics of B...
May 18, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Gao Qian, Li Yan-Wei, Huang Wen-Ling, Zhao Qin-Ping, Dong Hui-Fen
OBJECTIVE: To identify a myeloid differentiation factor 88 (MyD88) in Oncomelania hupensis , and characterize the role of MyD88 against Schistosoma japonicum infection. METHODS: The complete cDNA of MyD88 in O. hupensis was obtained by using rapid amplification of cDNA ends (RACE), and homologues sequences and conserved domains were aligned and the structure of MyD88 was predicted either. A phylogenetic tree of MyD88 was further constructed with other species. In addition, the mRNA expression level of O...
March 1, 2017: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
Renato Juvino de Aragão Mendes, Adalberto Alves Pereira Filho, Aline de Jesus Lustosa Nogueira, Karla Regina Freitas Araújo, Clícia Rosane Costa França, Iramar Borba de Carvalho, Natale Maria Lindoso da Silva, Alexandre Santana Azevedo, Ivone Garros Rosa
Schistosomiasis is a disease of global extent reaching populations in social vulnerability. One of the control measures of this parasitosis is the use of molluscicidal substances that can fight snails of the genus Biomphalaria, intermediate hosts of Schistosoma mansoni. The aim of this work was to study the toxic activity of three mangrove species (Avicennia schaueriana Stapf. & Leech, ex Moldenke, 1939, Laguncularia racemosa (L.) CF Gaertn, 1807 and Rhizophora mangle L. 1753) on the biological activities of snails Biomphalaria glabrata...
2018: Revista do Instituto de Medicina Tropical de São Paulo
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