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https://www.readbyqxmd.com/read/29161491/dengue-virus-detection-in-aedes-aegypti-larvae-and-pupae-collected-in-rural-areas-of-anapoima-cundinamarca-colombia
#1
Myriam Lucía Velandia-Romero, Víctor Alberto Olano, Carolina Coronel-Ruiz, Laura Cabezas, María Angélica Calderón-Peláez, Jaime Eduardo Castellanos, María Inés Matiz
INTRODUCTION: There is a high incidence and prevalence of dengue in the department of Cundinamarca, and recently Aedes aegypti, the main vector of dengue virus (DENV), was detected in some of its rural areas. OBJECTIVE: To evaluate viral transovarial transmission in larvae and pupae collected in rural areas of the municipality of Anapoima, Cundinamarca. MATERIALS AND METHODS: Live larvae and pupae were collected from 53 homes and later they were taken to the laboratory in Anapoima, where they were classified, pooled and frozen...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161487/virological-surveillance-of-aedes-stegomyia-aegypti-and-aedes-stegomyia-albopictus-as-support-for-decision-making-for-dengue-control-in-medell%C3%A3-n
#2
Juliana Pérez-Pérez, William H Sanabria, Carolina Restrepo, Raúl Rojo, Enrique Henao, Omar Triana, Ana María Mejía, Sandra M Castaño, Guillermo L Rúa-Uribe
INTRODUCTION: Dengue represents an important public health problem in Colombia. No treatment is available and the vaccine has not been approved in all countries, hence, actions should be strengthened to mitigate its impact through the control of Aedes aegypti, the vector mosquito. In Colombia, surveillance is done using entomological indexes and case notification, which is usually informed late, leading to untimely interventions. Viral detection in urban mosquitoes using molecular techniques provides more accurate entomological information for decision-making...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161479/-laboratory-susceptibility-tests-of-aedes-aegypti-and-culex-quinquefasciatus-larvae-to-the-entomopathogenic-nematode-heterorhabditis-bacteriophora
#3
Carolina Ulvedal, Marìa Alejandra Bertolotti, Susana Raquel Cagnolo, Walter Ricardo Almirón
INTRODUCTION: Aedes aegypti is the vector of dengue, yellow fever, Zika and Chikungunya viruses, and Culex quinquefasciatus is the vector of St. Louis and West Nile encephalitis viruses. OBJECTIVE: To evaluate infectivity of Heterorhabditis bacteriophora N4 in C. quinquefasciatus and A. aegypti larvae under laboratory conditions. MATERIALS AND METHODS: Thirty second-instar larvae of the two mosquito species were exposed each to different doses (0:1, 1:1, 5:1, 15:1, 100:1, 500:1, 750:1 and 1,500:1) of nematode infective juveniles...
March 29, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/29161280/microbial-caddisfly-bioherm-association-from-the-lower-cretaceous-shinekhudag-formation-mongolia-earliest-record-of-plant-armoring-in-fossil-caddisfly-cases
#4
Tsolmon Adiya, Cari L Johnson, Mark A Loewen, Kathleen A Ritterbush, Kurt N Constenius, Cory M Dinter
Caddisfly larvae construct underwater protective cases using surrounding materials, thus providing information on environmental conditions in both modern and ancient systems. Microbial bioherms associated with caddisfly cases are found in the Berriassian-Hauterivian (~140-130 Ma) Shinekhudag Formation of Mongolia, and yield new insights into aspects of lacustrine paleoecosystems and paleoenvironments. This formation contains the earliest record of plant-armored caddisfly cases and a rare occurrence of microbial-caddisfly association from the Mesozoic...
2017: PloS One
https://www.readbyqxmd.com/read/29160521/migration-pattern-of-toxocara-canis-larvae-in-experimentally-infected-male-and-female-rattus-norvegicus
#5
Sergio Vieira Dos Santos, Felipe Henrique Yazawa Santos, Susana Angelica Zevallos Lescano, Daniel Maurício Dos Santos, Érico da Silva Tiago, Gabriela Rodrigues E Fonseca, Manoel Carlos Sampaio de Almeida Ribeiro, Pedro Paulo Chieffi
No abstract text is available yet for this article.
September 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/29160362/potential-of-endophytic-fungi-as-biocontrol-agents-of-duponchelia-fovealis-zeller-lepidoptera-crambidae
#6
R F Amatuzzi, N Cardoso, A S Poltronieri, C G Poitevin, P Dalzoto, M A Zawadeneak, I C Pimentel
This study reports the first assessment of endophytic fungi isolated from strawberry leaves and selection of isolates for the control of Duponchelia fovealis, a new pest of strawberries. A total of 400 strawberry leaves of the cultivar 'Albion' were collected in four commercial farms. Leaves were disinfected, cut in fragments, and placed on Petri dishes containing potato dextrose agar media with tetracycline and incubated for 30 days. Following this time, 517 fungal colonies were isolated, and thirteen genera were identified: Cladosporium, Aspergillus, Nigrospora, Fusarium, Trichoderma, Chaetomium, Alternaria, Paecilomyces, Penicillium, Ulocladium, Bipolaris, Diaporthe, and Phoma...
November 9, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/29160358/potential-of-entomopathogenic-nematodes-of-the-genus-heterorhabditis-for-the-control-of-stomoxys-calcitrans-diptera-muscidae
#7
Luís Carlos de Souza Rodrigues Leal, Caio Márcio de Oliveira Monteiro, Alessandra Ésther de Mendonça, Vânia Rita Elias Pinheiro Bittencourt, Avelino José Bittencourt
The present study verified the pathogenic potential of entomopathogenic nematodes (EPNs) of the genus Heterorhabditis (Heterorhabditis bacteriophora, isolate HP88 and Heterorhabditis baujardi isolate LPP7) to immature stages of Stomoxys calcitrans in the laboratory. All EPN concentrations of the H. bacteriophora HP88 strain caused mean larval mortality greater than 90% after four days. Higher concentrations of the H. baujardi LPP7 isolate (≥50 EPNs/larva) eliminated more than 70% of larvae after six days with the concentration 200 EPNs/larva reaching mortality levels of 93...
November 9, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/29160353/in-vitro-evaluation-of-ivermectin-moxidectin-albendazole-and-pyrantel-against-cyathostomins-of-horses
#8
Marcelo Beltrão Molento, Ricardo José Canever
Cyathostomins are the most prevalent nematodes of horses, and multidrug resistance has been reported worldwide. There is a need to implement alternative drug monitoring analytical tests. The objective of this study was to determine the consistency (5 repetitions) of the larval migration on agar test (LMAT) using ivermectin, moxidectin, pyrantel or albendazole against cyathostomin infective-stage larvae in eight different concentrations. LMAT showed a strong coefficient of determination (R2 > 0.91), between the test repetitions (n=5)...
November 9, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/29160223/hematology-and-condition-factor-of-tui-chub-and-fathead-minnow-parasitized-by-nematode-from-upper-klamath-lake-oregon-usa
#9
Maurício L Martins, Marcos Tavares-Dias, Andrew J Janik, Michael L Kent, Gabriela T Jerônimo
This study evaluated the hematological profile and condition factor (Kn) of tui chub Siphateles bicolor and fathead minnow Pimephales promelas and their associations with larvae of Contracaecum sp. infection of the heart. A total of 30 tui chub and 17 fathead minnow were collected from Upper Klamath Lake, Oregon, USA, measured, and weighed and blood was drawn for hematological analysis. Nematode larvae parasitized tui chub with a prevalence of 50% and mean intensity of 1.40, while 11.8% of fathead minnow were parasitized at a mean intensity of 1...
November 21, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29160036/alternative-control-of-aedes-aegypti-resistant-to-pyrethroids-lethal-and-sublethal-effects-of-monoterpenes-bioinsecticides
#10
Indira M A Silva, Gustavo F Martins, Carlisson R Melo, Alisson S Santana, Ruan R N Faro, Arie F Blank, Péricles B Alves, Marcelo C Picanço, Paulo F Cristaldo, Ana Paula A Araújo, Leandro Bacci
BACKGROUND: The mosquito Aedes aegypti is intensely controlled because it is vector of viruses that cause innumerous diseases, especially in tropical regions. Due to the indiscriminate use of insecticides, populations from different regions have been resistant to pyrethroids. Here, we analyzed the lethal and sublethal effects of essential oil of Aristolochia trilobata and its major compounds on A. aegypti from susceptible and pyrethroid resistant populations. RESULTS: Our results showed that the toxicity and behavioral changes to different compounds are dependent of the stage of the insect life cycle...
November 21, 2017: Pest Management Science
https://www.readbyqxmd.com/read/29159846/horizontal-and-vertical-distribution-of-sea-lice-larvae-lepeophtheirus-salmonis-in-and-around-salmon-farms-in-the-bay-of-fundy-canada
#11
E J Nelson, S M C Robinson, N Feindel, A Sterling, A Byrne, K Pee Ang
The sea louse, Lepeophtheirus salmonis, is parasitic to salmonid species in the Northern Hemisphere and has become a widespread biological and economic problem for the salmon farming industry. A better understanding is needed of their spatial distribution and early life history to disrupt the life cycle of the sea louse. In this study, sea lice larval densities within salmon farms, between salmon farms and reference sites, and at various depths were quantified using both plankton pumps and plankton nets. Farm sites exhibited significantly higher densities than reference sites; however, these densities dropped an order of magnitude at a distance of 100 m from the cages...
November 21, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/29159064/morphological-keys-to-advance-the-understanding-of-protostrongylid-biodiversity-in-caribou-rangifer-spp-at-high-latitudes
#12
Pratap Kafle, Lisa-Marie Leclerc, Morgan Anderson, Tracy Davison, Manigandan Lejeune, Susan Kutz
The Protostrongylidae is a diverse family of nematodes capable of causing significant respiratory and neuromuscular disease in their ungulate and lagomorph hosts. Establishing the species diversity and abundance of the protostrongylid fauna has been hindered because the first stage larvae, commonly referred as dorsal spined larvae (DSL), that are shed in the feces are morphologically very similar among several genera. We aimed to determine the protostrongylid diversity and distribution in caribou (Rangifer tarandus groenlandicus and R...
December 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/29158970/snapshot-recordings-provide-a-first-description-of-the-acoustic-signatures-of-deeper-habitats-adjacent-to-coral-reefs-of-moorea
#13
Frédéric Bertucci, Eric Parmentier, Cécile Berthe, Marc Besson, Anthony D Hawkins, Thierry Aubin, David Lecchini
Acoustic recording has been recognized as a valuable tool for non-intrusive monitoring of the marine environment, complementing traditional visual surveys. Acoustic surveys conducted on coral ecosystems have so far been restricted to barrier reefs and to shallow depths (10-30 m). Since they may provide refuge for coral reef organisms, the monitoring of outer reef slopes and describing of the soundscapes of deeper environment could provide insights into the characteristics of different biotopes of coral ecosystems...
2017: PeerJ
https://www.readbyqxmd.com/read/29158965/colour-change-of-twig-mimicking-peppered-moth-larvae-is-a-continuous-reaction-norm-that-increases-camouflage-against-avian-predators
#14
Amy Eacock, Hannah M Rowland, Nicola Edmonds, Ilik J Saccheri
Camouflage, and in particular background-matching, is one of the most common anti-predator strategies observed in nature. Animals can improve their match to the colour/pattern of their surroundings through background selection, and/or by plastic colour change. Colour change can occur rapidly (a few seconds), or it may be slow, taking hours to days. Many studies have explored the cues and mechanisms behind rapid colour change, but there is a considerable lack of information about slow colour change in the context of predation: the cues that initiate it, and the range of phenotypes that are produced...
2017: PeerJ
https://www.readbyqxmd.com/read/29158446/drosophila-embryonic-type-ii-neuroblasts-origin-temporal-patterning-and-contribution-to-the-adult-central-complex
#15
Kathleen T Walsh, Chris Q Doe
Drosophila neuroblasts are an excellent model for investigating how neuronal diversity is generated. Most brain neuroblasts generate a series of ganglion mother cells (GMCs) that each make two neurons (type I lineage), but sixteen brain neuroblasts generate a series of intermediate neural progenitors (INPs) that each produce 4-6 GMCs and 8-12 neurons (type II lineage). Thus, type II lineages are similar to primate cortical lineages, and may serve as models for understanding cortical expansion. Yet the origin of type II neuroblasts remains mysterious: do they form in the embryo or larva? If they form in the embryo, do their progeny populate the adult central complex, as do the larval type II neuroblast progeny? Here we present molecular and clonal data showing that all type II neuroblasts form in the embryo, produce INPs, and express known temporal transcription factors...
November 20, 2017: Development
https://www.readbyqxmd.com/read/29158334/global-transcriptome-sequencing-reveals-molecular-profiles-of-summer-diapause-induction-stage-of-onion-maggot-delia-antiqua-diptera-anthomyiidae
#16
Shuang Ren, You-Jin Hao, Bin Chen, You-Ping Yin
The onion maggot, Delia antiqua, is a worldwide subterranean pest and can enter diapause during summer and winter seasons. The molecular regulation of the ontogenesis transition remains largely unknown. Here we used high-throughput RNA-Seq to identify candidate genes and processes linked to summer diapause induction by comparing the transcriptome differences between the most sensitive larval developmental stage of summer-diapause (SD) and non-diapause (ND). Nine pair-wise comparisons were performed and significantly differentially regulated transcripts were identified...
November 20, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29158081/streptococcus-pyogenes-nuclease-a-spna-mediated-virulence-does-not-exclusively-depend-on-nuclease-activity
#17
Callum Chalmers, Adrina Hema J Khemlani, Chae Ryeong Sohn, Jacelyn Mei San Loh, Catherine Jia-Yun Tsai, Thomas Proft
BACKGROUND: Streptococcus pyogenes, or Group A Streptococcus (GAS), is a human pathogen that causes a wide range of diseases, including pharyngitis, necrotizing fasciitis and toxic shock syndrome. The bacterium produces a large arsenal of virulence factors, including the cell wall-anchored Streptococcus pyogenes nuclease A (SpnA), which facilitates immune evasion by degrading the DNA backbone of neutrophil extracellular traps. SpnA consists of a C-terminal endo/exonuclease domain and a N-terminal domain of unknown function...
November 13, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/29158020/head-shape-variation-in-cerambycid-saproxylic-beetles-as-a-function-of-host-plant-selection
#18
Sandra M Ospina-Garcés, José Alfredo Hernández-Cardenas, Víctor H Toledo-Hernández, Angélica M Corona-López, Alejandro Flores-Palacios
Saproxylic insects depend on deadwood for larval development, and a certain degree of specialization may be involved in their choice of host plants and/or wood in a particular stage of degradation. The plant species chosen for oviposition in turn act as an environmental pressure on the head morphology of larvae and it is expected than head shape plasticity vary directly with the number of woody plant species used for larvae development in each insect species. We analyzed head shape variation in saproxylic beetles with respect to host plant species, maximum time of larval emergence and season of the year when insects colonized branches...
November 17, 2017: Arthropod Structure & Development
https://www.readbyqxmd.com/read/29157956/comparative-analysis-of-fixation-and-embedding-techniques-for-optimized-histological-preparation-of-zebrafish
#19
Jean E Copper, Lynn R Budgeon, Christina A Foutz, Damian B van Rossum, Daniel J Vanselow, Margaret J Hubley, Darin P Clark, David T Mandrell, Keith C Cheng
In recognition of the importance of zebrafish as a model organism for studying human disease, we have created a web-based reference atlas of zebrafish microanatomy for comparing histology and histopathology between model systems and with humans (http://bio-atlas.psu.edu). Fixation, decalcification, embedding, and sectioning were optimized to maximize section quality. A comparison of protocols involving six fixatives showed that 10% Neutral Buffered Formalin at 21°C for 24h yielded excellent results. Sectioning of juveniles and adults requires bone decalcification; EDTA at 0...
November 17, 2017: Comparative Biochemistry and Physiology. Toxicology & Pharmacology: CBP
https://www.readbyqxmd.com/read/29157269/biodiversity-seasonal-abundance-and-distribution-of-blackflies-diptera-simuliidae-in-six-different-regions-of-thailand
#20
Wichai Srisuka, Hiroyuki Takaoka, Yasushi Otsuka, Masako Fukuda, Sorawat Thongsahuan, Kritsana Taai, Atiporn Saeung
BACKGROUND: Blackflies are an important medical and veterinary group of small blood-sucking insects. Ninety-three blackfly species have been reported in Thailand. However, information on their biodiversity and population dynamics in each region is lacking. The main aim of this study was to assess the regional biodiversity, seasonal abundance and distribution of blackflies in six eco-geographically different regions in the country. METHODS: Blackfly larvae and pupae were sampled monthly from 58 sites between May 2011 and April 2013...
November 21, 2017: Parasites & Vectors
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