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Pesticide exposure

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https://www.readbyqxmd.com/read/28636345/levels-of-organochlorine-pesticides-are-associated-with-amyloid-aggregation-in-apex-avian-brains
#1
Kelly A Heys, Richard F Shore, M Gloria Pereira, Francis Luke Martin
Organochlorine (OC) pesticides pose a significant environmental risk to wildlife and humans and have been associated with Alzheimer's disease (AD). This study aims to spectroscopically analyse brains from free-flying birds and link the results to OC exposure and consequent amyloid aggregation. As long-lived apex predators, predatory birds represent a sentinel species similar to humans. Therefore, the results have implications for both species and may also add to our understanding of the role OC pesticides play in the development of AD...
June 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28636110/cumulative-toxicity-of-neonicotinoid-insecticide-mixtures-to-chironomus-dilutus-under-acute-exposure-scenarios
#2
Erin M Maloney, Christy A Morrissey, John V Headley, Kerry M Peru, Karsten Liber
Extensive agricultural use of neonicotinoid insecticide products has resulted in the presence of neonicotinoid mixtures in surface waters worldwide. Although many aquatic insect species are known to be sensitive to neonicotinoids, the impact of neonicotinoid mixtures is poorly understood. In the present study, the cumulative toxicity of binary and ternary mixtures of select neonicotinoids (imidacloprid, clothianidin, and thiamethoxam) was characterized under acute (96-h) exposure scenarios using the larval midge Chironomus dilutus as a representative aquatic insect species...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28634795/high-toxicity-of-camphene-and-%C3%AE-elemene-from-wedelia-prostrata-essential-oil-against-larvae-of-spodoptera-litura-lepidoptera-noctuidae
#3
Giovanni Benelli, Marimuthu Govindarajan, Mohamad S AlSalhi, Sandhanasamy Devanesan, Filippo Maggi
The development of eco-friendly biopesticides in the fight against agricultural pests is an important challenge nowadays. The essential oil of Wedelia prostrata Hemsl. is known for its multipurpose biological activities in Chinese folk medicine. However, limited efforts attempted to understand the potential insecticidal activity of its main individual constituents and related mechanism of action. In this research, we investigated the insecticidal activity of W. prostrata against the crop pest Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae)...
June 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28633649/erratum-to-pesticide-exposures-and-chronic-kidney-disease-of-unknown-etiology-an-epidemiologic-review
#4
Mathieu Valcke, Marie-Eve Levasseur, Agnes Soares da Silva, Catharina Wesseling
No abstract text is available yet for this article.
June 20, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28633499/lateralized-basal-ganglia-vulnerability-to-pesticide-exposure-in-asymptomatic-agricultural-workers
#5
Mechelle M Lewis, Nicholas W Sterling, Guangwei Du, Eun-Young Lee, Grace Shyu, Michael Goldenberg, Thomas Allen, Christy Stetter, Lan Kong, Shedra Amy Snipes, Byron C Jones, Honglei Chen, Richard B Mailman, Xuemei Huang
Background: Pesticide exposure is linked to Parkinson's disease (PD), a neurodegenerative disorder marked by dopamine cell loss in the substantia nigra of the basal ganglia (BG) that often presents asymmetrically. We previously reported that pesticide-exposed agricultural workers (AW) have nigral diffusion tensor (DTI) changes. The current study sought to confirm this finding, and explore its hemisphere and regional specificity within BG structures using an independent sample population...
June 19, 2017: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/28633115/occurrence-of-commonly-used-pesticides-in-personal-air-samples-and-their-associated-health-risk-among-paddy-farmers
#6
Hazwanee Hamsan, Yu Bin Ho, Siti Zulfa Zaidon, Zailina Hashim, Nazamid Saari, Ali Karami
Tanjung Karang, Selangor, is widely known for its paddy cultivation activity and hosts the third largest paddy field in Malaysia. Pesticides contamination in agriculture fields has become an unavoidable problem, as pesticides are used to increase paddy productivity and reduce plant disease. Human exposure to agrichemicals is common and could results in both acute and chronic health effects, such as acute and chronic neurotoxicity. This study aims to determine the concentrations of commonly used pesticides (azoxystrobin, buprofezin, chlorantraniliprole, difenoconazole, fipronil, imidacloprid, isoprothiolane, pretilachlor, propiconazole, pymetrozine, tebuconazole, tricyclazole, and trifloxystrobin) in personal air samples and their associated health risks among paddy farmers...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28631124/toxicity-evaluation-of-cypermethrin-glyphosate-and-malathion-on-two-indigenous-zooplanktonic-species
#7
Carlos Vicente Garza-León, Mario Alberto Arzate-Cárdenas, Roberto Rico-Martínez
In Aguascalientes, Mexico, there is a special concern about pesticides because of their intensive use on guava production areas, which are located in the vicinity of water reservoirs; thus, non-target organisms could be exposed. Thereafter, the aim of this work was to assess the effect of cypermethrin, Faena® (glyphosate), and malathion, which are the most used pesticides in Aguascalientes' guava production, on the indigenous freshwater species Alona guttata (cladoceran) and Lecane papuana (rotifer). Acute 48-h toxicity tests were carried out, and LC50 values were calculated...
June 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28630412/the-challenges-of-predicting-pesticide-exposure-of-honey-bees-at-landscape-level
#8
Noa Simon-Delso, Gilles San Martin, Etienne Bruneau, Christine Delcourt, Louis Hautier
To evaluate the risks of pesticides for pollinators, we must not only evaluate their toxicity but also understand how pollinators are exposed to these xenobiotics in the field. We focused on this last point and modeled honey bee exposure to pesticides at the landscape level. Pollen pellet samples (n = 60) from 40 Belgian apiaries were collected from late July to October 2011 and underwent palynological and pesticide residue analyses. Areas of various crops around each apiary were measured at 4 spatial scales...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28627408/developmental-exposure-to-glyphosate-based-herbicide-and-depressive-like-behavior-in-adult-offspring-implication-of-glutamate-excitotoxicity-and-oxidative-stress
#9
Daiane Cattani, Patrícia Acordi Cesconetto, Mauren Kruger Tavares, Eduardo Benedetti Parisotto, Paulo Alexandre De Oliveira, Carla Elise Heinz Rieg, Marina Concli Leite, Rui Daniel Schröder Prediger, Nestor Cubas Wendt, Guilherme Razzera, Danilo Wilhelm Filho, Ariane Zamoner
We have previously demonstrated that maternal exposure to glyphosate-based herbicide (GBH) leads to glutamate excitotoxicity in 15-day-old rat hippocampus. The present study was conducted in order to investigate the effects of subchronic exposure to GBH on some neurochemical and behavioral parameters in immature and adult offspring. Rats were exposed to 1% GBH in drinking water (corresponding to 0.36% of glyphosate) from gestational day 5 until postnatal day (PND)-15 or PND60. Results showed that GBH exposure during both prenatal and postnatal periods causes oxidative stress, affects cholinergic and glutamatergic neurotransmission in offspring hippocampus from immature and adult rats...
June 13, 2017: Toxicology
https://www.readbyqxmd.com/read/28626931/insecticide-resistance-and-intracellular-proteases
#10
REVIEW
Richard M Wilkins
Pesticide resistance is an example of evolution in action with mechanisms of resistance arising from mutations or increased expression of intrinsic genes. Intracellular proteases have a key role in maintaining healthy cells and in responding to stressors such as pesticides. Insecticide resistant insects have constitutively elevated intracellular protease activity when compared to corresponding susceptible strains. This increase was shown for some cases originally through biochemical enzyme studies and subsequently putatively by transcriptomics and proteomics methods...
June 19, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28624937/acute-toxicity-of-chemical-pesticides-and-plant-derived-essential-oil-on-the-behavior-and-development-of-earthworms-eudrilus-eugeniae-kinberg-and-eisenia-fetida-savigny
#11
Prabhakaran Vasantha-Srinivasan, Sengottayan Senthil-Nathan, Athirstam Ponsankar, Annamalai Thanigaivel, Muthiah Chellappandian, Edward-Sam Edwin, Selvaraj Selin-Rani, Kandaswamy Kalaivani, Wayne B Hunter, Veeramuthu Duraipandiyan, Naif Abdullah Al-Dhabi
Comparative toxicity of two chemical pesticides (temephos and monocrotophos) versus a plant-derived betel leaf oil Piper betle (L.) to earthworm Eudrilus eugeniae (Kinberg) and redworm Eisenia fetida Savigny, historically: Eisenia foetida (Savigny 1826), was evaluated. Mortality rate was more prominent in temephos at 100 μg concentration to both the earthworms in filter paper test (FPT) as well as 10 mg concentration in artificial soil test (AST). In contrast, P. betle does not display much mortality rate to both the earthworms even at 1000 mg of treatment concentrations...
June 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28623811/residential-exposure-to-pesticides-as-risk-factor-for-childhood-and-young-adult-brain-tumors-a-systematic-review-and-meta-analysis
#12
REVIEW
Geneviève Van Maele-Fabry, Laurence Gamet-Payrastre, Dominique Lison
BACKGROUND: Accumulating evidence suggests a positive association between exposure to non-agricultural pesticides and childhood brain tumors (CBT). OBJECTIVE: (1) To conduct a systematic review and meta-analysis of published studies on the association between residential/household/domestic exposure to pesticides and childhood brain tumors. (2) To clarify variables that could impact the results. METHODS: Publications in English were identified from a MEDLINE search through 28 February 2017 and from the reference list of identified publications...
June 14, 2017: Environment International
https://www.readbyqxmd.com/read/28622826/gstp1-and-xrcc1-polymorphisms-and-dna-damage-in-agricultural-workers-exposed-to-pesticides
#13
Amal Saad-Hussein, Magda Noshy, Mona Taha, Haidan El-Shorbagy, Eman Shahy, Ebtesam A Abdel-Shafy
Pesticide exposure may be associated with increased risk of genotoxicity and carcinogenesis. These risks may be affected by polymorphisms of genes for glutathione transferase-dependent metabolism of pesticides and for DNA repair. We studied the prevalence of GSTP1 and XRCC1 polymorphisms and their possible correlation with DNA damage following prolonged pesticide exposure. DNA damage was estimated by the comet assay in peripheral blood samples from 51 pesticide-exposed workers and 50 controls. GSTP1 (105) and XRCC1 (399 and 194) genotypes were identified by restriction fragment length analysis...
July 2017: Mutation Research
https://www.readbyqxmd.com/read/28622630/temporal-spatial-patterns-of-three-types-of-pesticide-loadings-in-a-middle-high-latitude-agricultural-watershed
#14
Wei Ouyang, Guanqing Cai, Mats Tysklind, Wanyin Yang, Fanghua Hao, Hongbin Liu
Pesticide loadings to watersheds increase during agricultural development and may vary in accordance with different crop types and seasons. High pesticide loadings can potentially result in polluted stream water. The objective of this study was to determine the pesticide loadings and concentrations of three typical pesticides (atrazine, oxadiazon, and isoprothiolane) in river water from a middle-high latitude agricultural watershed in northern China. During this study, we evaluated the watershed pesticide loss patterns for two crop types over three decades...
June 8, 2017: Water Research
https://www.readbyqxmd.com/read/28622109/farmworker-and-non-farmworker-latino-immigrant-men-in-north-carolina-have-high-levels-of-specific-pesticide-urinary-metabolites
#15
Thomas A Arcury, Haiying Chen, Paul J Laurienti, Timothy D Howard, Dana Boyd Barr, Dana C Mora, Sara A Quandt
This paper compares detections and concentrations of specific organophosphate, bis-dithiocarbamate, and pyrethroid insecticide urinary metabolites among Latino male farmworkers and non-farmworkers in North Carolina. Data are from interviews and urine samples collected in 2012 and 2013. Farmworkers and non-farmworkers frequently had detections for OP and pyrethroid pesticide urinary metabolites. Detections of bis-dithiocarbamate urinary metabolites were less frequent, but substantial among the non-farmworkers...
June 16, 2017: Archives of Environmental & Occupational Health
https://www.readbyqxmd.com/read/28618741/routine-assessment-of-occupational-exposure-and-its-relation-to-semen-quality-in-infertile-men-a-cross-sectional-study
#16
Salima Daoud, Afifa Sellami, Mehdi Bouassida, Sahbi Kebaili, Leila Ammar Keskes, Tarek Rebai, Nozha Chakroun Feki
BACKGROUND/AIM: Concerns about the detrimental effects of occupational and environmental exposure on male reproductive function have been raised by reports of declining sperm quality over the last decades. The aim of this study was to investigate the association between altered semen parameters and exposure to occupational risk factors as assessed by questionnaire. MATERIALS AND METHODS: We conducted a cross-sectional questionnaire-based study among a population of 2122 men who underwent andrological investigation for couple infertility...
June 12, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28618362/exposure-of-larvae-to-thiamethoxam-affects-the-survival-and-physiology-of-the-honey-bee-at-post-embryonic-stages
#17
Daiana Antonia Tavares, Claudia Dussaubat, André Kretzschmar, Stephan Malfitano Carvalho, Elaine C M Silva-Zacarin, Osmar Malaspina, Géraldine Bérail, Jean-Luc Brunet, Luc P Belzunces
Under laboratory conditions, the effects of thiamethoxam were investigated in larvae, pupae and emerging honey bees after exposure at larval stages with different concentrations in the food (0.00001 ng/μL, 0.001 ng/μL and 1.44 ng/μL). Thiamethoxam reduced the survival of larvae and pupae and consequently decreased the percentage of emerging honey bees. Thiamethoxam induced important physiological disturbances. It increased acetylcholinesterase (AChE) activity at all developmental stages and increased glutathione-S-transferase (GST) and carboxylesterase para (CaEp) activities at the pupal stages...
June 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28616686/mechanistic-approach-for-fabrication-of-gold-nanoparticles-by-nitzschia%C3%A2-diatom-and-their%C3%A2-antibacterial-activity
#18
Hemant P Borase, Chandrashekhar D Patil, Rahul K Suryawanshi, Sunil H Koli, Bhavana V Mohite, Giovanni Benelli, Satish V Patil
The problem of chemically synthesized nanoproducts motivated scientific community to explore ecofriendly methods of nanosynthesis. Diatoms belong to a group of aquatic, unicellular, photosynthetic microalgae have been scarcely investigated as a source of reducing and capping agents for nanosynthesis of pesticides and antibiotics. The present study reports a novel ecofriendly method for the fabrication of bioactive gold nanoparticles using locally isolated Nitzschia diatoms. The diatom-fabricated gold nanoparticles show characteristic ruby red colored with sharp absorbance peak at 529 nm...
June 14, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28615952/assessment-of-dithiocarbamate-residues-on-tomatoes-conventionally-grown-in-uganda-and-the-effect-of-simple-washing-to-reduce-exposure-risk-to-consumers
#19
REVIEW
Aggrey Atuhaire, Emmanuel Kaye, Innocent Louis Mutambuze, Graham Matthews, Theodor Friedrich, Erik Jørs
Pesticide misuse by farmers poses health risks to consumers. This study assessed the level of dithiocarbamate residues in tomatoes acquired from 20 farmers and 25 market vendors in Wakiso District, how simple washing affects these residues, and the potential chronic health risk for Ugandans eating such tomatoes. Results revealed that mancozeb was the only reported dithiocarbamate, and 47.4% and 14% of farm and market samples, respectively, had dithiocarbamate residues exceeding the Codex alimentarius maximum residue limit of 2 mgCS2/kg...
2017: Environmental Health Insights
https://www.readbyqxmd.com/read/28613271/an-evaluation-of-the-proposed-worker-protection-standard-with-respect-to-pesticide-exposure-and-parkinson-s-disease
#20
Alica Stubnova Sparling, David W Martin, Lillian B Posey
Citing a lack of information, the U.S. Environmental Protection Agency prudently did not account for the benefits of averting many chronic diseases in analyzing the Worker Protection Standards (WPS) revisions. We demonstrate that sufficient information can exist, using the example of the benefits to agricultural workers of reduced Parkinson's disease (PD) due to reduced pesticide exposure. We define the benefits as the monetary value gained by improving quality of lives of people who would otherwise develop PD, plus the value of medical care cost averted and income not lost due to being healthy...
June 14, 2017: International Journal of Environmental Research and Public Health
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