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Entomology, Insects

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https://www.readbyqxmd.com/read/28604832/insects-and-associated-arthropods-analyzed-during-medicolegal-death-investigations-in-harris-county-texas-usa-january-2013-april-2016
#1
Michelle R Sanford
The application of insect and arthropod information to medicolegal death investigations is one of the more exacting applications of entomology. Historically limited to homicide investigations, the integration of full time forensic entomology services to the medical examiner's office in Harris County has opened up the opportunity to apply entomology to a wide variety of manner of death classifications and types of scenes to make observations on a number of different geographical and species-level trends in Harris County, Texas, USA...
2017: PloS One
https://www.readbyqxmd.com/read/28591255/entomological-survey-in-the-state-of-piau%C3%A3-northeastern-brazil-reveals-intradomiciliary-colonization-of-triatoma-brasiliensis-macromelasoma
#2
Silvia Menezes Dos Santos, Danielle Misael de Sousa, Jessica Pereira Dos Santos, José Felipe Pinheiro do Nascimento Vieira, Teresa Cristina Monte Gonçalves, Jacenir Reis Dos Santos-Mallet, Filipe Anibal Carvalho-Costa
This survey aimed to assess the presence of triatomine vectors of Chagas disease within the rural communities of São João do Piauí, Northeast Brazil. Intradomiciliary and peridomiciliary collection strategies were implemented wherein 279 specimens of Triatoma brasiliensis macromelasoma, both nymph and adult were found in 15 (50%) of the studied homes. Of the intradomiciliary insects, 73 (67.6%) were identified as nymph instars (1st instar [N1]= 6, N2= 14, N3= 28, N4= 7 and N5= 18). In the studied communities, a continuous interaction between triatomine bugs and humans could be shown...
June 1, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28586212/species-identification-of-necrophagous-insect-eggs-based-on-amino-acid-profile-differences-revealed-by-direct-analysis-in-real-time-high-resolution-mass-spectrometry
#3
Justine E Giffen, Jennifer Y Rosati, Cameron M Longo, Rabi Ann Musah
The colonization of decomposing remains by necrophagous insects such as blow flies is of forensic importance because the progression through the various stages of insect development can be correlated to time of death. The ability to infer this information hinges on accurate determination of the fly species that are associated with the entomological evidence collected. This evidence can include eggs, larvae, pupae and puparial casings. Determination of the egg's identity is particularly challenging because the eggs of multiple species are morphologically very similar...
June 6, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28556457/the-new-insight-into-foregut-functions-of-xenobiotic-detoxification-in-the-cockroach-periplaneta-americana
#4
Jian-Hua Zhang, Song Zhang, Yuan-Xue Yang, Yi-Xi Zhang, Ze-Wen Liu
The physiological functions of insect foregut, especially in xenobiotic detoxification, are scarcely reported because of the unimportance in appearance and insufficient molecular information. The cockroach Periplaneta americana, an entomological model organism, provides perfect material to study physiological functions of foregut tissue due to its architectural feature. Through Illumina sequencing of foregut tissue from P. americana individuals (control) or insects treated with cycloxaprid, as novel neonicotinoid insecticide, 54 193 166 clean reads were obtained and further assembled into 53 853 unigenes with an average length of 366 bp...
May 26, 2017: Insect Science
https://www.readbyqxmd.com/read/28535279/identification-of-forensically-important-blow-flies-diptera-calliphoridae-in-china-based-on-coi
#5
Fanming Meng, Lipin Ren, Ziyue Wang, Jianqiang Deng, Yadong Guo, Chao Chen, Dmitrijs Finkelbergs, Jifeng Cai
Blow flies are among the most important insects in forensic entomology casework. Identification of blow fly species can be a time consuming and difficult task, especially at their early development stages. Present DNA-based technologies provide a promising identification method for these forensically important calliphorids. The cytochrome oxidase subunit I (COI) sequence has been applied as a suitable DNA marker in calliphorid identification for many years; however, limitation exists in using short sequence to determine genetically close species...
May 23, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28512294/the-potential-use-of-cuticular-hydrocarbons-and-multivariate-analysis-to-age-empty-puparial-cases-of-calliphora-vicina-and-lucilia-sericata
#6
Hannah E Moore, Jennifer L Pechal, M Eric Benbow, Falko P Drijfhout
Cuticular hydrocarbons (CHC) have been successfully used in the field of forensic entomology for identifying and ageing forensically important blowfly species, primarily in the larval stages. However in older scenes where all other entomological evidence is no longer present, Calliphoridae puparial cases can often be all that remains and therefore being able to establish the age could give an indication of the PMI. This paper examined the CHCs present in the lipid wax layer of insects, to determine the age of the cases over a period of nine months...
May 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28511270/laboratory-and-semi-field-evaluations-of-two-transfluthrin-spatial-repellent-devices-against-aedes-aegypti-l-diptera-culicidae
#7
Lee P McPhatter, Paula D Mischler, Meiling Z Webb, Kamal Chauhan, Erica J Lindroth, Alec G Richardson, Mustapha Debboun
Two transfluthrin-based spatial repellent products (Raid Dual Action Insect Repellent and Home Freshener and Raid Shield (currently not commercially available), SC Johnson, Racine WI) were evaluated for spatial repellent effects against female Aedes aegypti (L.) mosquitoes under laboratory (wind tunnel) and semi-field (outdoor enclosure) conditions. The placement of either product in the wind tunnel significantly reduced host-seeking behaviors. The mean baseline (control) landing counts for the Raid Dual Action and Raid Shield were reduced by 95% and 74% respectively...
January 2017: U.S. Army Medical Department Journal
https://www.readbyqxmd.com/read/28469245/micro-doppler-measurement-of-insect-wing-beat-frequencies-with-w-band-coherent-radar
#8
Rui Wang, Cheng Hu, Xiaowei Fu, Teng Long, Tao Zeng
The wingbeat frequency of insect migrant is regarded potentially valuable for species identification and has long drawn widespread attention in radar entomology. Principally, the radar echo signal can be used to extract wingbeat information, because both the signal amplitude and phase could be modulated by wing-beating. With respect to existing entomological radars, signal amplitude modulation has been used for wingbeat frequency measurement of large insects for many years, but the wingbeat frequency measurement of small insects remains a challenge...
May 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28427964/scanning-electron-microscopic-studies-on-antenna-of-hemipyrellia-ligurriens-wiedemann-1830-diptera-calliphoridae-a-blow-fly-species-of-forensic-importance
#9
Garima Hore, Aniruddha Maity, Atanu Naskar, Waliza Ansar, Shyamasree Ghosh, Goutam Kumar Saha, Dhriti Banerjee
Blow flies (Diptera: Calliphoridae) are one of the foremost organisms amongst forensic insects to colonize corpses shortly after death, thus are of immense importance in the domain of forensic entomology. The blow fly Hemipyrellia ligurriens (Wiedemann, 1830) (Diptera: Calliphoridae) is considered as a forensically important fly species globally and is also known for its medical and veterinary importance. In the present study, we report for the first time scanning electron microscopic studies on the morphology of sensilla of antenna of adult male and female of H...
April 18, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28390027/insects-associated-with-pig-carrion-in-two-environments-of-the-brazilian-savanna
#10
L S de Faria, M L Paseto, M S Couri, C A Mello-Patiu, J Mendes
Studies of carrion fauna have increased in Brazil and have contributed to the knowledge of this fauna in the national territory. Brazil has continental dimensions and presents various biomes in its territorial area. Most of the carrion fauna have seldom been studied, and this is especially true for the Savanna or "Cerrado." The present research examined the fauna visiting carrion in two environments and two seasons in a rural area situated in a region of Cerrado in southeastern Brazil. The two environments studied were a pasture and a fragment of semi-deciduous forest...
April 8, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28350353/insect-artifacts-are-more-than-just-altered-bloodstains
#11
REVIEW
David Rivers, Theresa Geiman
The bases for forensic entomology are that insects and their arthropod relatives can serve as evidence in criminal, medical and civil legal matters. However, some of the very same species that provide utility to legal investigations can also complicate crime scenes by distorting existing body fluid evidence (e.g., bloodstains, semen, saliva) and/or depositing artifacts derived from the insect alimentary canal at primary or secondary crime scenes. The insect contaminants are referred to as insect stains, artifacts, specks or spots, and are most commonly associated with human bloodstains...
March 28, 2017: Insects
https://www.readbyqxmd.com/read/28338605/comparing-species-composition-of-passive-trapping-of-adult-flies-with-larval-collections-from-the-body-during-scene-based-medicolegal-death-investigations
#12
Michelle R Sanford
Collection of insects at the scene is one of the most important aspects of forensic entomology and proper collection is one of the biggest challenges for any investigator. Adult flies are highly mobile and ubiquitous at scenes, yet their link to the body and the time of colonization (TOC) and post-mortem interval (PMI) estimates is not well established. Collection of adults is widely recommended for casework but has yet to be rigorously evaluated during medicolegal death investigations for its value to the investigation...
March 24, 2017: Insects
https://www.readbyqxmd.com/read/28303414/identification-of-muscidae-diptera-of-medico-legal-importance-by-means-of-wing-measurements
#13
Andrzej Grzywacz, Jakub Ogiela, Adam Tofilski
Cadavers attract numerous species and genera of Muscidae, both regular elements of carrion insect assemblages, and accidental visitors. Identification of adult Muscidae may be considered difficult, particularly by non-experts. Since species identification is a vital first step in the analysis of entomological material in any forensic entomology orientated experiment and real cases, various alternative methods of species identification have been proposed. We investigated possibility of semiautomated identification by means of wing measurements as an alternative for classic morphology and DNA-based approaches...
May 2017: Parasitology Research
https://www.readbyqxmd.com/read/28294575/variation-in-adult-stress-resistance-does-not-explain-vulnerability-to-climate-change-in-copper-butterflies
#14
Michael Klockmann, Leonard Wallmeyer, Klaus Fischer
Ongoing climate change is a major threat to biodiversity. However, although many species clearly suffer from ongoing climate change, others benefit from it e.g., by showing range expansions. However, which specific features determine a species' vulnerability to climate change? Phenotypic plasticity, which has been described as the first line of defence against environmental change, may be of utmost importance here. Against this background, we here compare plasticity in stress tolerance in three Copper butterfly species, which differ arguably in their vulnerability to climate change...
March 15, 2017: Insect Science
https://www.readbyqxmd.com/read/28275949/optimization-of-methodology-for-rearing-spodoptera-albula-on-artificial-diet
#15
M M Di Bello, B H S Souza, L Nogueira, Z A Ribeiro, W I Eduardo, A L Boiça Júnior
Advances in techniques for rearing insects on artificial diets are fundamental to solving issues of basic and applied entomology. In this study, we evaluated the development of Spodoptera albula (Walker) (Lepidoptera: Noctuidae) on three artificial diets used for other species of Lepidoptera, at three larval densities, and two densities of adult couples housed in oviposition cages of two sizes, with the aim of optimizing methodology for rearing S. albula in the laboratory. Biological parameters were recorded from S...
March 8, 2017: Neotropical Entomology
https://www.readbyqxmd.com/read/28267461/quantitative-pteridine-fluorescence-analysis-a-possible-age-grading-technique-for-the-adult-stages-of-the-blow-fly-calliphora-vicina-diptera-calliphoridae
#16
Victoria Bernhardt, Laura Hannig, Ronja Kinast, Marcel A Verhoff, Florian Rothweiler, Richard Zehner, Jens Amendt
Age estimation of adult flies could extend the possible window of time for calculating the minimal postmortem interval (PMImin) by means of entomological methods. Currently, this is done by estimating the time required by necrophagous Diptera to reach certain juvenile developmental landmarks, and the method only works until the end of metamorphosis and emergence of the adult fly. Particularly at indoor crime scenes, being able to estimate the age of trapped adult flies would be an important tool with which to extend the calculable PMI beyond the developmental period...
March 4, 2017: Journal of Insect Physiology
https://www.readbyqxmd.com/read/28261793/a-case-of-insect-colonization-before-the-death
#17
Stefano Vanin, Manuela Bonizzoli, Maria Luisa Migliaccio, Laura Tadini Buoninsegni, Valentina Bugelli, Vilma Pinchi, Martina Focardi
Forensic entomology is a branch of forensic science in which insects are used as evidence in legal investigations relating to humans, domestic animals and wildlife. One of the theoretical pillars on which the discipline is based concerns the fact that flies colonize a body after death. However in cases of myiasis, maggots are present before death, with consequences in the correct estimation of the minimum postmortem interval (mPMI). We report here the case of a woman, largely colonized by fly larvae, who has lain alive in her garden for four days prior to being rescued...
March 6, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28228921/scuttle-flies-diptera-phoridae-inhabiting-rabbit-carcasses-confined-to-plastic-waste-bins-in-malaysia-include-new-records-and-an-undescribed-species
#18
Raja M Zuha, See Huong-Wen, R Henry L Disney, Baharudin Omar
Scuttle flies (Diptera: Phoridae) are small-sized insects of forensic importance. They are well known for diversified species and habitats, but in the context of forensic entomology, scuttle flies' inhabitance of corpses remains inadequately explored. With recent reports indicating the existence of more scuttle fly species possibly inhabiting these environments, a decomposition study using animal carcasses in enclosed environments was conducted. The aim was to record the occurrence of scuttle flies on rabbit carcasses placed in sealed plastic waste bins for a 40-day period...
January 2017: Tropical Life Sciences Research
https://www.readbyqxmd.com/read/28148283/spatial-and-temporal-distribution-of-house-infestation-by-triatoma-infestans-in-the-toro-toro-municipality-potosi-bolivia
#19
Jorge Espinoza Echeverria, Antonio Nogales Rodriguez, Mirko Rojas Cortez, Liléia Gonçalves Diotaiuti, David E Gorla
BACKGROUND: Triatoma infestans is the main vector of Trypanosoma cruzi in Bolivia. The species is present both in domestic and peridomestic structures of rural areas, and in wild ecotopes of the Andean valleys and the Great Chaco. The identification of areas persistently showing low and high house infestation by the vector is important for the management of vector control programs. This study aimed at analyzing the temporal and spatial distribution of house infestation by T. infestans in the Toro Toro municipality (Potosi, Bolivia) between 2009 and 2014, and its association with environmental variables...
February 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28141965/evolution-of-stored-product-entomology-protecting-the-world-food-supply
#20
David W Hagstrum, Thomas W Phillips
Traditional methods of stored-product pest control were initially passed from generation to generation. Ancient literature and archaeology reveal hermetic sealing, burning sulfur, desiccant dusts, and toxic botanicals as early control methods. Whereas traditional nonchemical methods were subsequently replaced by synthetic chemicals, other traditional methods were improved and integrated with key modern pesticides. Modern stored-product integrated pest management (IPM) makes decisions using knowledge of population dynamics and threshold insect densities...
January 31, 2017: Annual Review of Entomology
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