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https://www.readbyqxmd.com/read/28734268/dna-barcoding-allows-identification-of-european-fanniidae-diptera-of-forensic-interest
#1
Andrzej Grzywacz, Dominika Wyborska, Marcin Piwczyński
In forensic entomology practice, species identification is a prerequisite for any further analysis of collected material. Although morphology-based taxonomy may be hindered by a range of factors, these are not obstacles for a molecular identification approach, so-called DNA barcoding. The Fanniidae are a dipteran family that is attracted to and breeds in decomposing animal carrion and dead human bodies. However, morphological identification of fanniids, both at adult and immature stages, is considered to be difficult, particularly for non-experts...
June 29, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28727733/a-new-methodology-for-sampling-blackflies-for-the-entomological-surveillance-of-onchocerciasis-in-brazil
#2
Érika S do Nascimento-Carvalho, Raquel de Andrade Cesário, Vladimir Fazito do Vale, Arion Tulio Aranda, Ana Carolina Dos Santos Valente, Marilza Maia-Herzog
The effectiveness of the MosqTent® trap was evaluated in endemic area to onchocerciasis in Brazil. This study seeks to provide subsidies for the monitoring of the onchocerciasis transmission in the country. The study was carried out at the Homoxi and Thirei villages, located in the Yanomami Indigenous Land, in the state of Roraima. This area presents hyperendemicity, high blackflies densities, large population migrations and mining activities. The Homoxi and Thirei villages are assisted by the Brazilian Ministry of Health...
2017: PloS One
https://www.readbyqxmd.com/read/28724450/variation-in-species-composition-and-infection-rates-of-anopheles-mosquitoes-at-different-altitudinal-transects-and-the-risk-of-malaria-in-the-highland-of-dirashe-woreda-south-ethiopia
#3
Taye Yohannes Daygena, Fekadu Massebo, Bernt Lindtjørn
BACKGROUND: The transmission of malaria is heterogeneous, and varies due to altitude. The information on whether the transmission of malaria is indigenous or imported to highland areas is scarce. Therefore, this study aimed to assess the species composition and infection rates of Anopheles at different altitudinal transects, and the risk of malaria if any in the highland of Dirashe Woreda, South Ethiopia. METHODS: This study was conducted in Gato (low altitude; average elevation of 1273 m), Onota (mid-altitude; average elevation of 1707 m) and Layignaw-Arguba (high altitude; average elevation of 2337 m) from August 2015 to April 2016...
July 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28715426/community-effectiveness-of-pyriproxyfen-as-a-dengue-vector-control-method-a-systematic-review
#4
Dorit Maoz, Tara Ward, Moody Samuel, Pie Müller, Silvia Runge-Ranzinger, Joao Toledo, Ross Boyce, Raman Velayudhan, Olaf Horstick
BACKGROUND: Vector control is the only widely utilised method for primary prevention and control of dengue. The use of pyriproxyfen may be promising, and autodissemination approach may reach hard to reach breeding places. It offers a unique mode of action (juvenile hormone mimic) and as an additional tool for the management of insecticide resistance among Aedes vectors. However, evidence of efficacy and community effectiveness (CE) remains limited. OBJECTIVE: The aim of this systematic review is to compile and analyse the existing literature for evidence on the CE of pyriproxyfen as a vector control method for reducing Ae...
July 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28715415/characterizing-the-malaria-rural-to-urban-transmission-interface-the-importance-of-reactive-case-detection
#5
Karen Molina Gómez, M Alejandra Caicedo, Alexandra Gaitán, Manuela Herrera-Varela, María Isabel Arce, Andrés F Vallejo, Julio Padilla, Pablo Chaparro, M Andreína Pacheco, Ananias A Escalante, Myriam Arevalo-Herrera, Sócrates Herrera Valencia
BACKGROUND: Reported urban malaria cases are increasing in Latin America, however, evidence of such trend remains insufficient. Here, we propose an integrated approach that allows characterizing malaria transmission at the rural-to-urban interface by combining epidemiological, entomological, and parasite genotyping methods. METHODS/PRINCIPAL FINDINGS: A descriptive study that combines active (ACD), passive (PCD), and reactive (RCD) case detection was performed in urban and peri-urban neighborhoods of Quibdó, Colombia...
July 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28708988/early-colonisation-of-urban-indoor-carcasses-by-blow-flies-diptera-calliphoridae-an-experimental-study-from-central-spain
#6
Daniel Martín-Vega, Carla Martín Nieto, Blanca Cifrián, Arturo Baz, Luisa M Díaz-Aranda
Due to their ubiquity and synanthropy, blow flies (Diptera: Calliphoridae) are generally the first colonisers of cadavers and, therefore, frequently used to estimate a minimum post-mortem interval (minPMI). Whereas in outdoor situations blow flies are expected to locate and colonise exposed cadavers within hours or even minutes after death, it is usually assumed that the colonisation of a cadaver indoors might be delayed for an uncertain period of time. This uncertainty severely limits the informativity of minPMI estimates based on entomological evidence...
July 8, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28699570/camino-verde-the-green-way-evidence-based-community-mobilisation-for-dengue-control-in-nicaragua-and-mexico-feasibility-study-and-study-protocol-for-a-randomised-controlled-trial
#7
Neil Andersson, Jorge Arostegui, Elizabeth Nava-Aguilera, Eva Harris, Robert J Ledogar
BACKGROUND: Since the Aedes aegypti mosquitoes that transmit dengue virus can breed in clean water, WHO-endorsed vector control strategies place sachets of organophosphate pesticide, temephos (Abate), in household water storage containers. These and other pesticide-dependent approaches have failed to curb the spread of dengue and multiple dengue virus serotypes continue to spread throughout tropical and subtropical regions worldwide. A feasibility study in Managua, Nicaragua, generated instruments, intervention protocols, training schedules and impact assessment tools for a cluster randomised controlled trial of community-based approaches to vector control comprising an alternative strategy for dengue prevention and control in Nicaragua and Mexico...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699560/dengue-occurrence-relations-and-serology-cross-sectional-analysis-of-results-from-the-guerrero-state-mexico-baseline-for-a-cluster-randomised-controlled-trial-of-community-mobilisation-for-dengue-prevention
#8
Elizabeth Nava-Aguilera, Arcadio Morales-Pérez, Alejandro Balanzar-Martínez, Ofelia Rodríguez-Ramírez, Abel Jiménez-Alejo, Miguel Flores-Moreno, David Gasga-Salinas, José Legorreta-Soberanis, Sergio Paredes-Solís, Pedro Antonio Morales-Nava, María de Lourdes Soto-Ríos, Robert J Ledogar, Joséfina Coloma, Eva Harris, Neil Andersson
BACKGROUND: The Mexican arm of the Camino Verde trial of community mobilisation for dengue prevention covered three coastal regions of Guerrero state: Acapulco, Costa Grande and Costa Chica. A baseline cross-sectional survey provided data for community mobilisation and for adapting the intervention design to concrete conditions in the intervention areas. METHODS: Trained field teams constructed community profiles in randomly selected clusters, based on observation and key informant interviews...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699559/aedes-aegypti-breeding-ecology-in-guerrero-cross-sectional-study-of-mosquito-breeding-sites-from-the-baseline-for-the-camino-verde-trial-in-mexico
#9
Arcadio Morales-Pérez, Elizabeth Nava-Aguilera, Alejandro Balanzar-Martínez, Antonio Juan Cortés-Guzmán, David Gasga-Salinas, Irma Esther Rodríguez-Ramos, Alba Meneses-Rentería, Sergio Paredes-Solís, José Legorreta-Soberanis, Felipe Gil Armendariz-Valle, Robert J Ledogar, Anne Cockcroft, Neil Andersson
BACKGROUND: Understanding the breeding patterns of Aedes aegypti in households and the factors associated with infestation are important for implementing vector control. The baseline survey of a cluster randomised controlled trial of community mobilisation for dengue prevention in Mexico and Nicaragua collected information about the containers that are the main breeding sites, identified possible actions to reduce breeding, and examined factors associated with household infestation. This paper describes findings from the Mexican arm of the baseline survey...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699558/beyond-efficacy-in-water-containers-temephos-and-household-entomological-indices-in-six-studies-between-2005-and-2013-in-managua-nicaragua
#10
Jorge Arosteguí, Josefina Coloma, Carlos Hernández-Alvarez, Harold Suazo-Laguna, Angel Balmaseda, Eva Harris, Neil Andersson, Robert J Ledogar
BACKGROUND: A cluster-randomized controlled trial of community mobilisation for dengue prevention in Mexico and Nicaragua reported, as a secondary finding, a higher risk of dengue virus infection in households where inspectors found temephos in water containers. Data from control sites in the preceding pilot study and the Nicaragua trial arm provided six time points (2005, 2006, 2007 and 2011, 2012, 2013) to examine potentially protective effects of temephos on entomological indices under every day conditions of the national vector control programme...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699557/-where-we-put-little-fish-in-the-water-there-are-no-mosquitoes-a-cross-sectional-study-on-biological-control-of-the-aedes-aegypti-vector-in-90-coastal-region-communities-of-guerrero-mexico
#11
Arcadio Morales-Pérez, Elizabeth Nava-Aguilera, José Legorreta-Soberanis, Antonio Juan Cortés-Guzmán, Alejandro Balanzar-Martínez, Eva Harris, Josefina Coloma, Víctor M Alvarado-Castro, Mónica Violeta Bonilla-Leon, Liliana Morales-Nava, Robert J Ledogar, Anne Cockcroft, Neil Andersson
BACKGROUND: In the Mexican state of Guerrero, some households place fish in water storage containers to prevent the development of mosquito larvae. Studies have shown that larvivorous fish reduce larva count in household water containers, but there is a lack of evidence about whether the use of fish is associated with a reduction in dengue virus infection. We used data from the follow up survey of the Camino Verde cluster randomised controlled trial of community mobilisation to reduce dengue risk to study this association...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699555/pupal-productivity-in-rainy-and-dry-seasons-findings-from-the-impact-survey-of-a-randomised-controlled-trial-of-dengue-prevention-in-guerrero-mexico
#12
Abel Jiménez-Alejo, Arcadio Morales-Pérez, Elizabeth Nava-Aguilera, Miguel Flores-Moreno, Sinahí Apreza-Aguilar, Wilhelm Carranza-Alcaraz, Antonio Juan Cortés-Guzmán, Ildefonso Fernández-Salas, Robert J Ledogar, Anne Cockcroft, Neil Andersson
BACKGROUND: The follow-up survey of a cluster-randomised controlled trial of evidence-based community mobilisation for dengue control in Nicaragua and Mexico included entomological information from the 2012 rainy and dry seasons. We used data from the Mexican arm of the trial to assess the impact of the community action on pupal production of the dengue vector Aedes aegypti in both rainy and dry seasons. METHODS: Trained field workers inspected household water containers in 90 clusters and collected any pupae or larvae present for entomological examination...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699552/assessing-the-effects-of-interventions-for-aedes-aegypti-control-systematic-review-and-meta-analysis-of-cluster-randomised-controlled-trials
#13
Víctor Alvarado-Castro, Sergio Paredes-Solís, Elizabeth Nava-Aguilera, Arcadio Morales-Pérez, Lidia Alarcón-Morales, Norma Alejandra Balderas-Vargas, Neil Andersson
BACKGROUND: The Aedes aegypti mosquito is the vector for dengue fever, yellow fever, chikungunya, and zika viruses. Inadequate vector control has contributed to persistence and increase of these diseases. This review assesses the evidence of effectiveness of different control measures in reducing Aedes aegypti proliferation, using standard entomological indices. METHODS: A systematic search of Medline, Ovid, BVS, LILACS, ARTEMISA, IMBIOMED and MEDIGRAPHIC databases identified cluster randomised controlled trials (CRCTs) of interventions to control Aedes aegypti published between January 2003 and October 2016...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699544/informed-community-mobilization-for-dengue-prevention-in-households-with-and-without-a-regular-water-supply-secondary-analysis-from-the-camino-verde-trial-in-nicaragua
#14
Alvaro Cárcamo, Jorge Arosteguí, Josefina Coloma, Eva Harris, Robert J Ledogar, Neil Andersson
BACKGROUND: Studies in different countries have identified irregular water supply as a risk factor for dengue virus transmission. In 2013, Camino Verde, a cluster-randomised controlled trial in Managua, Nicaragua, and Mexico's Guerrero State, demonstrated impact of evidence-based community mobilisation on recent dengue infection and entomological indexes of infestation by Aedes aegypti mosquitoes. This secondary analysis of data from the trial impact survey asks: (1) what is the importance of regular water supply in neighbourhoods with and without the trial intervention and (2) can community interventions like Camino Verde reasonably exclude households with adequate water supply? METHODS: Entomological data collected in the dry season of 2013 in intervention and control communities allow contrasts between households with regular and irregular water supplies...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28699541/randomised-controlled-trials-and-changing-public-health-practice
#15
EDITORIAL
Anne Cockcroft
One reason for doing randomised controlled trials (RCTs) is that experiments can be convincing. Early epidemiological experimenters, such as Jenner and the smallpox vaccine and Snow and his famous Broad Street pump handle, already knew the answer they were demonstrating; they used the experiments as knowledge translation devices to convince others.More sophisticated modern experiments include cluster randomised controlled trials (CRCTs) for experiments in the public health setting. The knowledge translation value remains: RCTs and CRCTs can potentially stimulate changes of practice among stakeholders...
May 30, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28684267/current-vector-control-challenges-in-the-fight-against-malaria
#16
REVIEW
Giovanni Benelli, John C Beier
The effective and eco-friendly control of Anopheles vectors plays a key role in any malaria management program. Integrated Vector Management (IVM) suggests making use of the full range of vector control tools available. The strategies for IVM require novel technologies to control outdoor transmission of malaria. Despite the wide number of promising control tools tested against mosquitoes, current strategies for malaria vector control used in most African countries are not sufficient to achieve successful malaria control...
July 3, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28683145/geographical-distribution-of-culicoides-diptera-ceratopogonidae-in-mainland-portugal-presence-absence-modelling-of-vector-and-potential-vector-species
#17
David W Ramilo, Telmo Nunes, Sara Madeira, Fernando Boinas, Isabel Pereira da Fonseca
Vector-borne diseases are not only accounted responsible for their burden on human health-care systems, but also known to cause economic constraints to livestock and animal production. Animals are affected directly by the transmitted pathogens and indirectly when animal movement is restricted. Distribution of such diseases depends on climatic and social factors, namely, environmental changes, globalization, trade and unplanned urbanization. Culicoides biting midges are responsible for the transmission of several pathogenic agents with relevant economic impact...
2017: PloS One
https://www.readbyqxmd.com/read/28673298/is-outdoor-vector-control-needed-for-malaria-elimination-an-individual-based-modelling-study
#18
Lin Zhu, Günter C Müller, John M Marshall, Kristopher L Arheart, Whitney A Qualls, WayWay M Hlaing, Yosef Schlein, Sekou F Traore, Seydou Doumbia, John C Beier
BACKGROUND: Residual malaria transmission has been reported in many areas even with adequate indoor vector control coverage, such as long-lasting insecticidal nets (LLINs). The increased insecticide resistance in Anopheles mosquitoes has resulted in reduced efficacy of the widely used indoor tools and has been linked with an increase in outdoor malaria transmission. There are considerations of incorporating outdoor interventions into integrated vector management (IVM) to achieve malaria elimination; however, more information on the combination of tools for effective control is needed to determine their utilization...
July 3, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28673285/multiple-entries-and-exits-and-other-complex-human-patterns-of-insecticide-treated-net-use-a-possible-contributor-to-residual-malaria-transmission
#19
Steven A Harvey, Yukyan Lam, Nina A Martin, Maribel Paredes Olórtegui
BACKGROUND: Increased insecticide-treated net (ITN) use over the last decade has contributed to dramatic declines in malaria transmission and mortality, yet residual transmission persists even where ITN coverage exceeds 80%. This article presents observational data suggesting that complex human net use patterns, including multiple entries to and exits from ITNs by multiple occupants throughout the night, might be a contributing factor. METHODS: The study included dusk-to-dawn observations of bed net use in 60 households in the Peruvian Amazon...
July 3, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28668988/blowfly-puparia-in-a-hermetic-container-survival-under-decreasing-oxygen-conditions
#20
Anna Mądra-Bielewicz, Katarzyna Frątczak-Łagiewska, Szymon Matuszewski
Despite widely accepted standards for sampling and preservation of insect evidence, unrepresentative samples or improperly preserved evidence are encountered frequently in forensic investigations. Here, we report the results of laboratory studies on the survival of Lucilia sericata and Calliphora vomitoria (Diptera: Calliphoridae) intra-puparial forms in hermetic containers, which were stimulated by a recent case. It is demonstrated that the survival of blowfly intra-puparial forms inside airtight containers is dependent on container volume, number of puparia inside, and their age...
July 1, 2017: Forensic Science, Medicine, and Pathology
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