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Malacology

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https://www.readbyqxmd.com/read/27326385/freshwater-gastropods-diversity-hotspots-three-new-species-from-the-uruguay-river-south-america
#1
Diego E Gutiérrez Gregoric, Micaela de Lucía
BACKGROUND: The Atlantic Forest is globally one of the priority ecoregions for biodiversity conservation. In Argentina, it is represented by the Paranense Forest, which covers a vast area of Misiones Province between the Paraná and Uruguay rivers. The Uruguay River is a global hotspot of freshwater gastropod diversity, here mainly represented by Tateidae (genus Potamolithus) and to a lesser extent Chilinidae. The family Chilinidae (Gastropoda, Hygrophila) includes 21 species currently recorded in Argentina, and three species in the Uruguay River...
2016: PeerJ
https://www.readbyqxmd.com/read/27230422/natural-and-human-induced-factors-influencing-the-abundance-of-schistosoma-host-snails-in-zambia
#2
Concillia Monde, Stephen Syampungani, Paul J van den Brink
Schistosomiasis remains a global public health problem affecting about 240 million people. In Zambia, 2 million are infected while 3 million live with the risk of getting infected. Research and interventions relating to schistosomiasis are mainly linked to disease epidemiology. Malacological and ecological aspects of the disease are superficially understood. Developing effective control measures requires an understanding of interacting environmental and socioeconomic factors of host snails vis-a-vis schistosomiasis...
December 0: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/27197551/outbreak-of-urogenital-schistosomiasis-in-corsica-france-an-epidemiological-case-study
#3
Jérôme Boissier, Sébastien Grech-Angelini, Bonnie L Webster, Jean-François Allienne, Tine Huyse, Santiago Mas-Coma, Eve Toulza, Hélène Barré-Cardi, David Rollinson, Julien Kincaid-Smith, Ana Oleaga, Richard Galinier, Joséphine Foata, Anne Rognon, Antoine Berry, Gabriel Mouahid, Rémy Henneron, Hélène Moné, Harold Noel, Guillaume Mitta
BACKGROUND: Schistosomiasis is a snail-borne parasitic disease endemic in several tropical and subtropical countries. However, in the summer of 2013, an unexpected outbreak of urogenital schistosomiasis occurred in Corsica, with more than 120 local people or tourists infected. We used a multidisciplinary approach to investigate the epidemiology of urogenital schistosomiasis in Corsica, aiming to elucidate the origin of the outbreak. METHODS: We did parasitological and malacological surveys at nine potential sites of infection...
August 2016: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/27015646/impact-of-annual-praziquantel-treatment-on-urogenital-schistosomiasis-in-a-seasonal-transmission-focus-in-central-senegal
#4
Bruno Senghor, Omar Talla Diaw, Souleymane Doucoure, Mouhamadane Seye, Adiouma Diallo, Idrissa Talla, Cheikh T Bâ, Cheikh Sokhna
In Sub-Saharan Africa, urogenital schistosomiasis remains a significant public health problem, causing 150.000 deaths/year with approximately 112 million cases diagnosed. The Niakhar district is a disease hotspot in central Senegal where transmission occurs seasonally with high prevalences. The aim of this study was to determine the effect of annual treatment over 3 years on the seasonal transmission dynamics of S. haematobium in 9 villages in the Niakhar district. Adults and children aged between 5 and 60 years were surveyed from 2011 to 2014...
March 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/26863858/malacological-investigation-of-the-fully-operational-nam-theun-2-hydroelectric-dam-project-in-khammouane-province-central-lao-pdr
#5
Pusadee Sri-aroon, Phiraphol Chusongsang, Yupa Chusongsang, Yanin Limpanont, Pornpimol Surinthwong, Khamsing Vongphayloth, Paul T Brey
We conducted a malacological investigation in four districts of the Nam Theun 2 (NT2) hydroelectric dam project area, Khammouane Province, central Lao PDR (Nakai, Gnommalath, Mahaxai and Xe Bang Fai), after the first and second years of full operation in March 2010 and November 2011 to determine health risks for humans. A total 10,863 snail specimens (10 families/23 species) from 57 sampling stations and 12,902 snail specimens (eight families/21 species) from 66 sampling stations were collected in 2010 and 2011, respectively...
September 2015: Southeast Asian Journal of Tropical Medicine and Public Health
https://www.readbyqxmd.com/read/26775291/assessment-of-the-fascimol-elisa-in-the-detection-of-the-trematode-fasciola-hepatica-in-field-collected-galba-cubensis-a-novel-tool-for-the-malacological-survey-of-fasciolosis-transmission
#6
Annia Alba, Antonio A Vázquez, Jorge Sánchez, Jorge Fraga, Hilda Hernández, Elizabeth Martínez, Ricardo Marcet, Mabel Figueredo, Jorge Sarracent
BACKGROUND: Fasciolosis is one of the food-borne neglected trematodioses that has reemerged as a human disease while its effects on domestic animal health remains of significant economic consideration. Being snail-borne disease, the accurate and time-saving epidemiological surveillance of the transmission foci where infected lymnaeid snails occur could be essential to effectively focus or redirect control strategies. For this purpose, the first monoclonal antibody-based immunoenzymatic assay to detect Fasciola hepatica-infected snails (FasciMol-ELISA) was recently developed and showed a high sensitivity and specificity when tested in an experimental F...
2016: Parasites & Vectors
https://www.readbyqxmd.com/read/26520794/prevalence-of-intestinal-helminth-infection-among-school-children-in-maksegnit-and-enfranz-towns-northwestern-ethiopia-with-emphasis-on-schistosoma-mansoni-infection
#7
Fikru Gashaw, Mulugeta Aemero, Mengistu Legesse, Beyene Petros, Tilahun Teklehaimanot, Girmay Medhin, Nega Berhe, Yalemtsehay Mekonnen, Berhanu Erko
BACKGROUND: Schistosomiasis is endemic in Ethiopia and previously unknown transmission foci have been reported from time to time in different parts of the country. Further surveys are required in areas where endemicity of the disease is not known to cover them with control program if transmission is taking place. This study, therefore, aims to assess the magnitude of schistosomiasis mansoni and soil-transmitted helminthiasis in Maksegnit and Enfranz Towns, northwestern Ethiopia. METHODS: Cross-sectional parasitological and malacological surveys were conducted in three schools found in Maksegnit and Enfranz Towns...
2015: Parasites & Vectors
https://www.readbyqxmd.com/read/26246374/study-of-the-snail-intermediate-hosts-of-urogenital-schistosomiasis-in-niakhar-region-of-fatick-west-central-senegal
#8
Bruno Senghor, Omar Talla Diaw, Souleymane Doucoure, Mouhamadane Seye, Idrissa Talla, Adiouma Diallo, Cheikh Tidiane Bâ, Cheikh Sokhna
BACKGROUND: Schistosoma haematobium is the most widespread schistosome species in Senegal and occurs in several regions of the country especially in the Sudan-Sahelian zone. The aims of the study were i) to determine the freshwater species ii) to ascertain the role of the identified snail species in the transmission of S. haematobium and iii) to study the impact of drought on the snails. METHODS: Snails were sampled each year in 17 sites from July to November-December 2012 and 2013...
2015: Parasites & Vectors
https://www.readbyqxmd.com/read/26003596/evidence-of-increasing-risk-of-schistosomiasis-among-school-age-children-in-municipality-of-calatrava-province-of-negros-occidental-philippines
#9
V Y Belizario, J M Erfe, Jra Naig, Plc Chua
OBJECTIVE: To explore risk of school-age children being infected with schistosomiasis in selected villages in the municipality of Calatrava, province of Negros Occidental, Philippines. METHODS: As part of the monitoring and evaluation of the helminth control program in the province of Negros Occidental, parasitological monitoring, through the use microscopy of stool samples processed using Kato-Katz technique, was conducted to describe the baseline and follow-up parasitological status of school-age children in 2010 and 2012, respectively...
May 2015: Asian Pacific Journal of Tropical Medicine
https://www.readbyqxmd.com/read/25982569/biomphalaria-straminea-mollusca-planorbidae-as-an-intermediate-host-of-drepanocephalus-spp-trematoda-echinostomatidae-in-brazil-a-morphological-and-molecular-study
#10
Hudson A Pinto, Matt J Griffin, Sylvie M Quiniou, Cynthia Ware, Alan L Melo
Species of trematodes belonging to the genus Drepanocephalus are intestinal parasites of piscivorous birds, primarily cormorants (Phalachrocorax spp.), and are widely reported in the Americas. During a 4-year malacological study conducted on an urban lake in Brazil, 27-collar-spined echinostome cercariae were found in 1665/15,459 (10.7 %) specimens of Biomphalaria straminea collected. The cercariae were identified as Drepanocephalus spp. by sequencing the 18S (SSU) rDNA, ITS1/5.8S rDNA/ITS2 (ITS), 28S (LSU) rDNA region, cytochrome oxidase subunit 1 (CO1), and nicotinamide adenine dinucleotide dehydrogenase subunit 1 (ND1) markers...
January 2016: Parasitology Research
https://www.readbyqxmd.com/read/25973199/urban-schistosomiasis-and-associated-determinant-factors-among-school-children-in-bamako-mali-west-africa
#11
Abdoulaye Dabo, Adama Z Diarra, Vanessa Machault, Ousmane Touré, Diarra Sira Niambélé, Abdoulaye Kanté, Abdoulaye Ongoiba, Ogobara Doumbo
BACKGROUND: Schistosomiasis is classically described as a rural disease that occurs in areas with poor sanitary conditions. However, over recent decades, there has been an expansion of schistosomiasis foci towards urban areas faced with a rapid and disordered urbanization. In Bamako, Mali, the impact of environmental change on vector-borne diseases such as schistosomiasis is not well known. This study sought to identify the presence of schistosomiasis transmission hotspots in Bamako. Using this perspective, we aimed to describe the risk factors of the endemization and maintenance of schistosomiasis...
2015: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/25643852/a-new-focus-of-schistosomiasis-mansoni-in-hayk-town-northeastern-ethiopia
#12
Gashaw Amsalu, Zeleke Mekonnen, Berhanu Erko
BACKGROUND: The endemicity of human schistosomiasis has long been established in Ethiopia, and new foci have also been continuously reported.The objective of this study was to determine the transmission and magnitude of schistosomiasis in Hayk area, northeastern Ethiopia. METHODS: A cross sectional parasitological survey involving 384 school children was conducted for intestinal schistosomiasis between January and March 2010 in two primary schools in Hayk area, northeastern Ethiopia...
2014: BMC Research Notes
https://www.readbyqxmd.com/read/25545929/the-spatial-and-seasonal-distribution-of-bulinus-truncatus-bulinus-forskalii-and-biomphalaria-pfeifferi-the-intermediate-host-snails-of-schistosomiasis-in-n-djamena-chad
#13
Wendelin Moser, Helena Greter, Christian Schindler, Fiona Allan, Bongo N R Ngandolo, Daugla D Moto, Jürg Utzinger, Jakob Zinsstag
There is a paucity of epidemiological and malacological data pertaining to schistosomiasis in Chad. In view of a recently articulated elimination agenda, a deeper understanding of the spatio-temporal distribution of schistosomiasis intermediate host snails is pivotal. We conducted cross-sectional malacological surveys during the dry season (April/May 2013) and after the short rainy season (October 2013) in N'Djamena, the capital of Chad. Snails were identified at the genus and species level using morphological keys and molecular DNA barcoding approaches...
November 2014: Geospatial Health
https://www.readbyqxmd.com/read/25229292/a-malacological-survey-in-the-manso-power-plant-state-of-mato-grosso-brazil-new-records-of-freshwater-snails-including-transmitters-of-schistosomiasis-and-exotic-species
#14
Monica Ammon Fernandez, Aline Carvalho de Mattos, Elizangela Feitosa da Silva, Sonia Barbosa Dos Santos, Silvana Carvalho Thiengo
INTRODUCTION: Schistosomiasis is a parasitic disease of public health concern in Brazil, and the construction of hydroelectric dams, in addition to increasing permanent human settlement and tourism, has created conditions suitable for the establishment of mollusks that can transmit schistosomiasis. Such areas require a number of actions to prevent the establishment of schistosomiasis. This paper reports on a freshwater malacological survey carried out in the geographical area of the Manso Power Plant...
July 2014: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/25184111/evaluation-and-updating-of-the-medical-malacology-collection-fiocruz-cmm-using-molecular-taxonomy
#15
Cryslaine Aguiar-Silva, Cristiane Lafetá Furtado Mendonça, Pedro Henrique da Cunha Kellis Pinheiro, Silvia Gonçalves Mesquita, Omar Dos Santos Carvalho, Roberta Lima Caldeira
BACKGROUND: The Medical Malacology Collection (Coleção de Malacologia Médica, Fiocruz-CMM) is a depository of medically relevant mollusks, especially from the genus Biomphalaria, which includes the hosts of Schistosoma mansoni. Taxonomic studies of these snails have traditionally focused on the morphology of the reproductive system. However, determination of some species is complicated by the similarity shown by these characters. Molecular techniques have been used to try to overcome this problem...
2014: SpringerPlus
https://www.readbyqxmd.com/read/25166746/the-prawn-macrobrachium-vollenhovenii-in-the-senegal-river-basin-towards-sustainable-restocking-of-all-male-populations-for-biological-control-of-schistosomiasis
#16
Amit Savaya Alkalay, Ohad Rosen, Susanne H Sokolow, Yacinthe P W Faye, Djibril S Faye, Eliahu D Aflalo, Nicolas Jouanard, Dina Zilberg, Elizabeth Huttinger, Amir Sagi
Early malacological literature suggests that the outbreak of schistosomiasis, a parasitic disease transmitted by aquatic snails, in the Senegal River basin occurred due to ecological changes resulting from the construction of the Diama dam. The common treatment, the drug praziquantel, does not protect from the high risk of re-infection due to human contact with infested water on a daily basis. The construction of the dam interfered with the life cycle of the prawn Macrobrachium vollenhovenii by blocking its access to breeding grounds in the estuary...
August 2014: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/24941324/reduced-susceptibility-of-a-biomphalaria-tenagophila-population-to-schistosoma-mansoni-after-introducing-the-resistant-taim-rs-strain-of-b-tenagophila-into-herivelton-martins-stream
#17
Daisymara Priscila de Almeida Marques, Florence Mara Rosa, Engels Maciel, Deborah Negrão-Corrêa, Horácio Manuel Santana Teles, Roberta Lima Caldeira, Liana Konovaloff Jannotti-Passos, Paulo Marcos Zech Coelho
Studies performed in the last 30 years demonstrated that a strain of B. tenagophila from the Taim Biological Reserve is completely resistant to Schistosoma mansoni infection. This resistance to parasite infection is a dominant characteristic during crossbreeding with susceptible B. tenagophila strains. These experiments also identified a 350 bp molecular marker that is exclusive to the Taim strain and does not occur in other geographic strains of this snail species. The Taim strain (Taim/RS) of Biomphalaria tenagophila was bred on a large scale, physically marked and introduced into a stream in which previous malacological analyses had revealed the presence of only parasite-susceptible B...
2014: PloS One
https://www.readbyqxmd.com/read/24893012/study-of-the-snail-intermediate-hosts-for-schistosoma-mansoni-on-itamarac%C3%A3-island-in-northeast-brazil-spatial-displacement-of-biomphalaria-glabrata-by-biomphalaria-straminea
#18
Constança S Barbosa, Verônica S Barbosa, Wheverton C Nascimento, Otavio S Pieri, Karina C G M Araújo
In 2012 a malacological survey of the breeding sites of Biomphalaria glabrata and B. straminea , the two intermediate host snails of Schistosoma mansoni , was carried out on Itamaraca Island in Pernambuco, Brazil. This study has now been extended by studying the competition between the two species. Snails were collected and dissected to identify the species and tests were performed to verify S. mansoni infection. Student's t test was used to compare the proportion between the two species and their breeding sites and a parasitological survey was conducted among local residents, using the Kato-Katz method...
May 2014: Geospatial Health
https://www.readbyqxmd.com/read/24781377/neglected-tropical-diseases-prevalence-and-risk-factors-for-schistosomiasis-and-soil-transmitted-helminthiasis-in-a-region-of-minas-gerais-state-brazil
#19
Luzivalda D Couto, Sandra H C Tibiriça, Izabella O Pinheiro, Adalberto Mitterofhe, Adilson C Lima, Milton F Castro, Murilo Gonçalves, Marcio R Silva, Ricardo J P S Guimarães, Florence M Rosa, Elaine S Coimbra
BACKGROUND: Among the neglected tropical diseases (NTDs), schistosomiasis and the three main soil-transmitted helminthiases (STHs), i.e., ascariasis, trichuriasis and hookworm infection, represent the most common infections in developing countries. In Brazil, there is a lack of epidemiological data in many parts of the country, which favors the unawareness of the real situation concerning these diseases. Due to this, we investigated the occurrence of schistosomiasis and STHs in a region of Minas Gerais State, Brazil...
June 2014: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/24690282/schistosomiasis-in-pre-school-age-children-and-their-mothers-in-chikhwawa-district-malawi-with-notes-on-characterization-of-schistosomes-and-snails
#20
Helen Poole, Dianne J Terlouw, Andrew Naunje, Kondwani Mzembe, Michelle Stanton, Martha Betson, David G Lalloo, J Russell Stothard
BACKGROUND: To complement ongoing schistosomiasis control within national control programmes (NCPs) that administer praziquantel to school-age children, assessing the risk and extent of schistosomiasis in pre-school-age children (PSAC) is important. METHODS: In June 2012, schistosomiasis in Chikhwawa district, Malawi was assessed across 12 villages examining pre-school-age children (PSAC) and their mothers by serological and parasitological diagnosis, as supplemented with urine-antigen and questionnaire-interview methods...
April 1, 2014: Parasites & Vectors
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