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https://www.readbyqxmd.com/read/27903067/predicting-the-spatial-distribution-of-biomphalaria-straminea-a-potential-intermediate-host-for-schistosoma-mansoni-in-china
#1
Mohamed R Habib, Yun-Hai Guo, Shan Lv, Wen-Biao Gu, Xiao-Heng Li, Xiao-Nong Zhou
Schistosomiasis is one of the most prevalent parasitic diseases impacting human health in the tropics and sub-tropics. The geographic distribution of Schistosoma mansoni, the most widespread species, includes areas in Africa, the Middle East, South America and the Caribbean. Snails of the genus Biomphalaria act as intermediate host for S. mansoni. Biomphalaria straminea is not indigenous in China but was accidentally introduced to Hong Kong from South America and has spread to other habitats in the southern parts of the country...
November 29, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27903064/modelling-of-the-distribution-of-biomphalaria-glabrata-and-biomphalaria-straminea-in-the-metropolitan-region-of-recife-pernambuco-brazil
#2
Verônica Santos Barbosa, Ricardo José de Paula Souza E Guimarães, Rodrigo Moraes Loyo, Constança Simões Barbosa
The occurrence of schistosomiasis is directly linked to the presence of its snail intermediate host Biomphalaria spp. Knowledge of geographical distribution, habitats and behaviour of these snails in relation to the climate is essential for guiding measures for disease prevention and control. This study aims to model the distribution of B. glabrata and B. straminea in schistosomiasis non-endemic areas of the metropolitan region of Recife (MRR) based on environmental data and estimates of snail distributions in endemic and neighbouring areas...
November 25, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27819717/wnt7b-gene-expression-and-functional-analysis-in-the-mussel-mytilus-coruscus
#3
Y F Xu, X Liang, Y R Chen, Y F Li, J L Yang
To understand the potential functions of Wnt7b in different developmental stages and adult tissues of the mussel Mytilus coruscus, the Wnt7b gene was cloned using the rapid amplification of cDNA ends technique. The full-length Wnt7b gene was 1910 bp long, with a 1059-bp open reading frame encoding 352 amino acids. The amino acid sequence of the M. coruscus Wnt7b gene shared high homology with that of Homo sapiens (59%), Mus musculus (61%), Danio rerio (61% similarity), Biomphalaria glabrata (62% similarity), Aplysia californica (66% similarity), and Crassostrea gigas (74%)...
November 3, 2016: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/27814746/modelling-the-spatial-and-seasonal-distribution-of-suitable-habitats-of-schistosomiasis-intermediate-host-snails-using-maxent-in-ndumo-area-kwazulu-natal-province-south-africa
#4
Tawanda Manyangadze, Moses John Chimbari, Michael Gebreslasie, Pietro Ceccato, Samson Mukaratirwa
BACKGROUND: Schistosomiasis is a snail-borne disease endemic in sub-Saharan Africa transmitted by freshwater snails. The distribution of schistosomiasis coincides with that of the intermediate hosts as determined by climatic and environmental factors. The aim of this paper was to model the spatial and seasonal distribution of suitable habitats for Bulinus globosus and Biomphalaria pfeifferi snail species (intermediate hosts for Schistosoma haematobium and Schistosoma mansoni, respectively) in the Ndumo area of uMkhanyakude district, South Africa...
November 4, 2016: Parasites & Vectors
https://www.readbyqxmd.com/read/27793108/deep-multi-stage-transcriptome-of-the-schistosomiasis-vector-biomphalaria-glabrata-provides-platform-for-understanding-molluscan-disease-related-pathways
#5
Nathan J Kenny, Marta Truchado-García, Cristina Grande
BACKGROUND: The gastropod mollusc Biomphalaria glabrata is well known as a vector for the tropical disease schistosomiasis, which affects nearly 200 million people worldwide. Despite intensive study, our understanding of the genetic basis of B. glabrata development, growth and disease resistance is constrained by limited genetic resources, constraints for which next-generation sequencing methods provide a ready solution. METHODS: Illumina sequencing and de novo assembly using the Trinity program was used to generate a high-quality transcriptomic dataset spanning the entirety of in ovo development in schistosomiasis-free B...
October 28, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27762185/loads-of-trematodes-discovering-hidden-diversity-of-paramphistomoids-in-kenyan-ruminants
#6
Martina R Laidemitt, Eva T Zawadzki, Sara V Brant, Martin W Mutuku, Gerald M Mkoji, Eric S Loker
Paramphistomoids are ubiquitous and widespread digeneans that infect a diverse range of definitive hosts, being particularly speciose in ruminants. We collected adult worms from cattle, goats and sheep from slaughterhouses, and cercariae from freshwater snails from ten localities in Central and West Kenya. We sequenced cox1 (690 bp) and internal transcribed region 2 (ITS2) (385 bp) genes from a small piece of 79 different adult worms and stained and mounted the remaining worm bodies for comparisons with available descriptions...
October 20, 2016: Parasitology
https://www.readbyqxmd.com/read/27743973/the-influence-of-angiostrongylus-cantonensis-nematoda-metastrongylidae-infection-on-the-aerobic-metabolism-of-biomphalaria-straminea-and-biomphalaria-tenagophila-mollusca-gastropoda
#7
Mariana G Lima, Vinícius M Tunholi-Alves, Fabrício N Gaudêncio, Florence G Martins, Rosane N Castro, Silvana C Thiengo, Juberlan S Garcia, Arnaldo Maldonado, Jairo Pinheiro
Angiostrongylus cantonensis is considered the main agent responsible for human eosinophilic meningoencephalitis. This parasite has low specificity for mollusk hosts and it can also use aquatic snails as auxiliary hosts. Studies based on the metabolic profile of Biomphalaria spp. infected by A. cantonensis have been conducted to observe parasite-host interactions. In the present study, the glucose content in the hemolymph and glycogen content in the digestive gland and cephalopedal mass of Biomphalaria tenagophila and Biomphalaria straminea experimentally infected by A...
October 12, 2016: Experimental Parasitology
https://www.readbyqxmd.com/read/27683811/assessment-of-the-impact-of-changes-in-temperature-in-biomphalaria-glabrata-say-1818-melanic-and-albino-variants-infected-with-schistosoma-mansoni-sambon-1907
#8
E A F Camargo, J T F Camargo, M F Neves, L F Simões, L A D Bastos, L A Magalhães, E M Zanotti-Magalhães
Fluctuations in population density of planorbid hosts of S. mansoni are influenced by climatic factors. The knowledge about interference from changes in water temperature in these populations is an important aspect of the epidemiology of schistosomiasis. In this experiment, it is explored the influence of different temperatures on the development of Schistosoma mansoni in Biomphalaria glabrata melanic and albino variants. The results indicated an intrinsic relationship between temperature and development of the parasite in the intramollusc phase, independent of the pigmentation of the mantle of the molluscs...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27683809/susceptibility-of-biomphalaria-glabrata-submitted-to-concomitant-infection-with-angiostrongylus-costaricensis-and-schistosoma-mansoni
#9
L R Guerino, J F Carvalho, L A Magalhães, E M Zanotti-Magalhães
The easy adaptation of Angiostrongylus costaricensis, nematode responsible for abdominal angiostrongyliasis to several species of terrestrial and freshwater molluscs and the differences observed in the interactions of trematodes with their intermediate hosts have induced us to study the concomitant infection of Biomphalaria glabrata with Schistosoma mansoni and A. costaricensis. Prior exposure of B. glabrata to A. costaricensis (with an interval of 48 hours), favored the development of S. mansoni, observing higher infection rate, increased release of cercariae and increased survival of molluscs, when compared to molluscs exposed only to S...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27683807/host-parasite-relationship-between-biomphalaria-amazonica-paraense-1966-and-schistosoma-mansoni-sambon-1907
#10
L F Simões, L D B Bastos, E A F Camargo, M F Neves, A X Linhares, L A Magalhães, E M Zanotti-Magalhães
Biomphalaria amazonica is a planorbid species considered a potential host of Schistosoma mansoni. It is widely distributed in the Neotropical zone, particularly in the North and Centre-West of Brazil and in the North of Bolivia. The aim of the present study was to determine the host-parasite relationship between B. amazonica and S. mansoni (BH and SJ strains). Specimens of B. amazonica and their snail-conditioned water were examined in terms of their ability to attract miracidia. The infectivity of the mollusks was determined by exposing them to 20 miracidia of both strains...
September 26, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27637225/evaluating-the-risk-of-schistosoma-mansoni-transmission-in-mainland-china
#11
Guoli Qu, Wei Wang, Xiaomin Lu, Jianrong Dai, Xiaoheng Li, Yousheng Liang
Biomphalaria straminea, an intermediate host of Schistosoma mansoni, is predominantly distributed in the South Americas and Caribbean; however, this snail, as an invasive species, was introduced to Shenzhen, southern China, in 1981, and recent epidemiologic surveys demonstrate that the distribution of B. straminea has expanded across the Zhujiang River Basin, South China. In the presence of continuous importation of S. mansoni-infected cases, there is a growing concern about the transmission of S. mansoni in China...
September 9, 2016: Parasitology Research
https://www.readbyqxmd.com/read/27605788/molecular-approach-for-detecting-early-prepatent-schistosoma-mansoni-infection-in-biomphalaria-alexandrina-snail-host
#12
Adel Farghaly, Ayman A Saleh, Soad Mahdy, Dalia Abd El-Khalik, Naglaa F Abd El-Aal, Sara A Abdel-Rahman, Marwa A Salama
The present study aimed to evaluate a polymerase chain reaction (PCR) assay used for detection of Schistosoma mansoni infection in Biomphalaria alexandrina snails in early prepatent period and to compare between it and the ordinary detection methods (shedding and crushing). Biomphalaria alexandrina snails are best known for their role as intermediate hosts of S. mansoni. DNA was extracted from infected snails in addition to non-infected "negative control" (to optimized the efficiency of PCR reaction) and subjected to PCR using primers specific to a partial sequence of S...
September 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27605774/digenetic-larvae-in-schistosome-snails-from-el-fayoum-egypt-with-detection-of-schistosoma-mansoni-in-the-snail-by-pcr
#13
Shawky M Aboelhadid, Marwa Thabet, Dayhoum El-Basel, Ragaa Taha
The present study aims to detect the digenetic larvae infections in Bulinus truncatus and Biomphalaria alexandrina snails and also PCR detection of Schistosoma mansoni infection. The snails were collected from different branches of Yousef canal and their derivatives in El Fayoum Governorate. The snails were investigated for infection through induction of cercarial shedding by exposure to light and crushing of the snails. The shed cercariae were S. mansoni, Pharyngeate longifurcate type I and Pharyngeate longifurcate type II from B...
September 2016: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/27599101/changes-in-energetic-metabolism-of-biomphalaria-glabrata-mollusca-planorbidae-in-response-to-exogenous-calcium
#14
L D Silva, V C S Amaral, M C Vinaud, A M Castro, H H A Rezende, D B Santos, C C Mello-Silva, J C B Bezerra
Calcium is considered an essential element for the metabolism of aquatic snail Biomphalaria glabrata (Say, 1818), intermediate host of Schistosoma mansoni Sambon, 1907 in Brazil, and represents a limiting factor to its distribution and adaptation to the environment. This study investigated the effect of different concentrations of exogenous CaCO3 on the energetic metabolism of B. glabrata for better understanding the physiological interference of chemical elements dissolved in the environment with the physiology of this species...
September 5, 2016: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/27581006/land-use-effect-on-invertebrate-assemblages-in-pampasic-streams-buenos-aires-argentina
#15
Marina Solis, Hernán Mugni, Lisa Hunt, Natalia Marrochi, Silvia Fanelli, Carlos Bonetto
Agriculture and livestock may contribute to water quality degradation in adjacent waterbodies and produce changes in the resident invertebrate composition. The objective of the present study was to assess land use effects on the stream invertebrate assemblages in rural areas of the Argentine Pampa. The four sampling events were performed at six sites in four streams of the Pampa plain; two streams were sampled inside a biosphere reserve, and another one was surrounded by extensive livestock fields. The fourth stream was sampled at three sites; the upstream site was adjacent to agricultural plots, the following site was adjacent to an intensive livestock plot and the downstream site was adjacent to extensive breeding cattle plots...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27539726/austrodiplostomum-sp-bolbophorus-sp-digenea-diplostomidae-and-clinostomum-marginatum-digenea-clinostomidae-metacercariae-in-inland-silverside-menidia-beryllina-from-catfish-aquaculture-ponds-with-notes-on-the-infectivity-of-austrodiplostomum-sp-cercariae-in
#16
Thomas G Rosser, Wes A Baumgartner, Neely R Alberson, Ethan T Woodyard, Stephen R Reichley, David J Wise, Linda M Pote, Matt J Griffin
In the southeastern USA, catfish aquaculture is burdened by predation from piscivorous birds and the digenetic trematodes they carry. In addition to cultured ictalurid fish, other forage or incidental fish species inhabit catfish production ponds. Of these, the inland silverside Menidia beryllina was recently found to harbor larval metacercariae of several trematode species. Three species of metacercariae were reported, two of which represent the first morphological descriptions of an Austrodiplostomum sp. and Bolbophorus sp...
November 2016: Parasitology Research
https://www.readbyqxmd.com/read/27448327/steroid-androgen-exposure-during-development-has-no-effect-on-reproductive-physiology-of-biomphalaria-glabrata
#17
Satwant Kaur, Alice Baynes, Anne E Lockyer, Edwin J Routledge, Catherine S Jones, Leslie R Noble, Susan Jobling
Gastropod mollusks have been proposed as alternative models for male reproductive toxicity testing, due to similarities in their reproductive anatomy compared to mammals, together with evidence that endocrine disrupting chemicals can cause effects in some mollusks analogous to those seen in mammals. To test this hypothesis, we used the freshwater pulmonate snail, Biomphalaria glabrata, for which various genetic tools and a draft genome have recently become available, to investigate the effects of two steroid androgens on the development of mollusk secondary sexual organs...
2016: PloS One
https://www.readbyqxmd.com/read/27447210/new-larval-trematodes-in-biomphalaria-species-planorbidae-from-northeastern-argentina
#18
María Virginia Fernández, Monika Inés Hamann, Margarita Ostrowski de Núñez
Larval trematodes infecting Biomphalaria tenagophila and B. occidentalis were surveyed in a suburban and semipermanent pond of Corrientes province, Northeastern Argentina. A total of 1,409 snails were examined between spring 2011 to winter 2013, and 8 different larval trematodes were studied morphologically. Three of these species-Echinocercaria sp. IV, Ribeiroia sp. and Echinocercaria sp. XIV-have been previously found in Corrientes province. Six other trematodes belonging to Strigeidae (Furcocercaria sp. III), Clinostomidae (Cercaria Clinostomidae sp...
September 1, 2016: Acta Parasitologica
https://www.readbyqxmd.com/read/27374126/critical-analysis-of-molluscicide-application-in-schistosomiasis-control-programs-in-brazil
#19
REVIEW
Pmz Coelho, R L Caldeira
In Brazil, Biomphalaria glabrata, B. tenagophila, and B. straminea are naturally infected by the trematode Schistosoma mansoni, the causative agent of schistosomiasis. Despite decades of governmental efforts through official control programs, schistosomiasis remains an important public health problem in the country: thousands of people are infected with the trematode each year and millions live in endemic areas. The World Health Organization recommends using a combination of molluscicide (niclosamide) and mass chemotherapy to control the transmission of schistosomiasis, with this treatment successfully reducing the morbidity of the disease...
2016: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/27334406/trematode-infections-of-the-freshwater-snail-biomphalaria-pfeifferi-from-a-south-east-nigerian-community-with-emphasis-on-cercariae-of-schistosoma
#20
O C Okeke, P O Ubachukwu
Knowledge of trematode infections in Biomphalaria pfeifferi from south-eastern Nigeria is scarce, due to the absence of Schistosoma mansoni infection in the region. Therefore, the present study sought to describe trematode infections in B. pfeifferi from the River Uzuru in the Nigeria Cement Factory area, Nkalagu, south-eastern Nigeria. Four hundred and sixty snails were checked for trematode infections, and mice were exposed to the Schistosoma cercariae shed from the snails. Adult worms were harvested from the mice 13 weeks post-infection, while sections of the liver and spleen were examined...
June 23, 2016: Journal of Helminthology
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