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Ivermectin

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https://www.readbyqxmd.com/read/28523490/ivermectin-lipid-based-nanocarriers-as-novel-formulations-against-head-lice
#1
Gabriela Ullio-Gamboa, Santiago Palma, Jean Pierre Benoit, Daniel Allemandi, María Inés Picollo, Ariel Ceferino Toloza
The use of pyrethroids to control the human head louse, Pediculus humanus capitis De Geer (Anoplura: Pediculidae), has suffered considerable loss of efficacy due to the evolution of resistance. Thus, the development of efficiently insecticide delivery systems is imperative for the control of head lice. We studied the insecticidal activity of ivermectin-loaded lipid nanocapsules (IVM-LNC) against permethrin-resistant head lice from Argentina. The LNC, prepared by a phase inversion procedure, were characterized in terms of size, surface potential, and physical stability...
May 18, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28508467/keratitis-due-to-microfilariae-in-dogs-a-newly-recognized-disease
#2
Adriana Morales, Eduardo Perlmann, Aline Nayara Vechiato Abelha, Carlos Emilio Levy, Ana Carolina Almeida de Goes, Angélica M V Safatle
Parasitic agents have been associated with keratitis, but a diagnosis of parasitic keratitis has not been commonly made in domestic animals. The purpose of this study was to describe the clinical and histopathological findings in seven dogs with chronic keratitis caused by microfilariae diagnosed in Brazil. All dogs presented with superficial corneal opacities of varying degrees affecting the perilimbal and central regions of the cornea, with other opaque areas appearing as crystalline deposits and corneal vascularization...
May 15, 2017: Veterinary Ophthalmology
https://www.readbyqxmd.com/read/28505198/strongyloides-seroprevalence-before-and-after-an-ivermectin-mass-drug-administration-in-a-remote-australian-aboriginal-community
#3
Therese M Kearns, Bart J Currie, Allen C Cheng, James McCarthy, Jonathan R Carapetis, Deborah C Holt, Wendy Page, Jennifer Shield, Roslyn Gundjirryirr, Eddie Mulholland, Linda Ward, Ross M Andrews
BACKGROUND: Strongyloides seroprevalence is hyper-endemic in many Australian Aboriginal and Torres Strait Islander communities, ranging from 35-60%. We report the impact on Strongyloides seroprevalence after two oral ivermectin mass drug administrations (MDAs) delivered 12 months apart in a remote Australian Aboriginal community. METHODS: Utilizing a before and after study design, we measured Strongyloides seroprevalence through population census with sequential MDAs at baseline and month 12...
May 15, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28492204/impact-assessment-study-after-27-years-of-community-directed-treatment-with-ivermectin-in-galadimawa-kaduna-state-nigeria
#4
Olufemi E Babalola, Amos Bassi
PURPOSE: To assess the impact on blindness after 27 years of community-directed treatment with ivermectin (CDTI) in the Galadimawa community of Kauru Local Government in Kaduna state, Nigeria. The population of Galadimawa constituted about 12% of the total population examined during the ivermectin randomised control trial (RCT) in 1989. The RCT population of 8000 individuals was scattered over 36 villages in Kaduna state. Thus, longitudinal data are available on blindness. MATERIALS AND METHODS: After 27 years of dosing with ivermectin, the people in the community of Galadimawa were re-examined for the prevalence and causes of blindness...
January 2017: Nigerian Postgraduate Medical Journal
https://www.readbyqxmd.com/read/28482929/ivermectin-induced-steven-johnsons-syndrome-case-report
#5
Desmond Aroke, Diego Nitcheu Tchouakam, Alexis Tazinya Awungia, Sylvester Yari Mapoh, Stewart Ndutard Ngassa, Benjamin Momo Kadia
BACKGROUND: Stevens-Johnson syndrome is one of the manifestations of mucocutaneous adverse drug reactions. Although antimicrobials are responsible for greater than 50% of these adverse drug reactions, there is no documented case implicating ivermectin as the culprit. A 38 year old adult Cameroonian male presented to our health facility with facial rash, painful oral sores, black eschars on lips and red tearing eyes 3 days following ingestion of ivermectin received during a nationwide anti-filarial campaign...
May 8, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28479392/relationship-between-ivermectin-concentrations-at-the-injection-site-muscle-and-fat-of-steers-treated-with-traditional-and-long-acting-preparations
#6
Sebastian Iezzi, Peter Purslow, Christensen Sara, Carlos Lanusse, Adrian Lifschitz
Ivermectin (IVM) is broad-spectrum compound active against endo and ecto-parasites of clinical relevance in veterinary and human medicine. It is commercially available to use in livestock animals as injectable formulations containing 1% IVM and also as a concentrated (3.15%) long-acting (LA) preparation. The potential risk of the presence of high concentrations of drug residues in muscle tissue at the injection site is therefore a concern. The aim of this study was to determine the relationship between the IVM residual concentrations at the injection site, in comparison to the untreated contralateral neck (control muscle) and in fat from cattle treated with different preparations...
May 4, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28479061/crystal-structures-of-human-glyr%C3%AE-3-bound-to-ivermectin
#7
Xin Huang, Hao Chen, Paul L Shaffer
Ivermectin acts as a positive allosteric modulator of several Cys-loop receptors including the glutamate-gated chloride channels (GluCls), γ-aminobutyric acid receptors (GABAARs), glycine receptors (GlyRs), and neuronal α7-nicotinic receptors (α7 nAChRs). The crystal structure of Caenorhabditis elegans GluCl complexed with ivermectin revealed the details of its ivermectin binding site. Although the electron microscopy structure of zebrafish GlyRα1 complexed with ivermectin demonstrated a similar binding orientation, detailed structural information on the ivermectin binding and pore opening for Cys-loop receptors in vertebrates has been elusive...
May 4, 2017: Structure
https://www.readbyqxmd.com/read/28472570/scabies-a-clinical-update
#8
Myra Hardy, Daniel Engelman, Andrew Steer
BACKGROUND: Scabies is a common, yet neglected, skin disease. Scabies occurs across Australia, but most frequently in socioeconomically disadvantaged populations in tropical regions, including in remote Aboriginal and Torres Strait Islander communities. In temperate settings, the disease clusters in institutional care facilities. OBJECTIVE: The objective of this article is to provide updates on the clinical diagnosis and treatment approaches for scabies in Australia...
2017: Australian Family Physician
https://www.readbyqxmd.com/read/28468637/drug-transporter-mediated-interactions-between-anthelminthic-and-antiretroviral-drugs-across-the-caco-2-cell-monolayers
#9
Gabriel Kigen, Geoffrey Edwards
BACKGROUND: Drug interactions between antiretroviral drugs (ARVs) and anthelminthic drugs, ivermectin (IVM) and praziquantel (PZQ) were assessed by investigating their permeation through the Caco-2 cell monolayers in a transwell. The impact of anthelminthics on the transport of ARVs was determined by assessing the apical to basolateral (AP → BL) [passive] and basolateral to apical (BL → AP) [efflux] directions alone, and in presence of an anthelminthic. The reverse was conducted for the assessment of the influence of ARVs on anthelminthics...
May 4, 2017: BMC Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28458073/community-directed-mass-drug-administration-is-undermined-by-status-seeking-in-friendship-networks-and-inadequate-trust-in-health-advice-networks
#10
Goylette F Chami, Andreas A Kontoleon, Erwin Bulte, Alan Fenwick, Narcis B Kabatereine, Edridah M Tukahebwa, David W Dunne
Over 1.9 billion individuals require preventive chemotherapy through mass drug administration (MDA). Community-directed MDA relies on volunteer community medicine distributors (CMDs) and their achievement of high coverage and compliance. Yet, it is unknown if village social networks influence effective MDA implementation by CMDs. In Mayuge District, Uganda, census-style surveys were conducted for 16,357 individuals from 3,491 households in 17 villages. Praziquantel, albendazole, and ivermectin were administered for one month in community-directed MDA to treat Schistosoma mansoni, hookworm, and lymphatic filariasis...
June 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28438169/ivermectin-and-malaria-control
#11
Satoshi Ōmura, Andy Crump
As the world begins to realize the very real prospect of eliminating malaria as a public health problem globally, the scientific community is acutely aware that novel and innovative new tools will be required if that lofty goal is to be accomplished. Moreover, the need for comprehensive, integrated products and interventions is being recognized in order for the critical 'final steps' toward elimination to be taken successfully. Failure to take these crucial last steps have dogged all past global disease elimination programmes, except for smallpox...
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28438168/upon-entering-an-age-of-global-ivermectin-based-integrated-mass-drug-administration-for-neglected-tropical-diseases-and-malaria
#12
Frank O Richards
Ivermectin mass drug administration (MDA) in humans to reduce malaria vectors is yet another use for this remarkable medicine whose discoverers shared the 2015 Nobel Prize in Medicine with the discoverer of artemisinin. The malaria community should join those who have long used ivermectin MDA in an integrated battle to break transmission of three vector-borne parasitic diseases.
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28434407/ivermectin-to-reduce-malaria-transmission-iii-considerations-regarding-regulatory-and-policy-pathways
#13
REVIEW
Carlos Chaccour, N Regina Rabinovich
Vector control is a task previously relegated to products that (a) kill the mosquitoes directly at different stages (insecticides, larvicides, baited traps), or (b) avoid/reduce human-mosquito contact (bed nets, repellents, house screening), thereby reducing transmission. The potential community-based administration of the endectocide ivermectin with the intent to kill mosquitoes that bite humans, and thus reduce malaria transmission, offers a novel approach using a well-known drug, but additional steps are required to address technical, regulatory and policy gaps...
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28434405/ivermectin-to-reduce-malaria-transmission-ii-considerations-regarding-clinical-development-pathway
#14
REVIEW
Carlos Chaccour, N Regina Rabinovich
The development of ivermectin as a complementary vector control tool will require good quality evidence. This paper reviews the different eco-epidemiological contexts in which mass drug administration with ivermectin could be useful. Potential scenarios and pharmacological strategies are compared in order to help guide trial design. The rationale for a particular timing of an ivermectin-based tool and some potentially useful outcome measures are suggested.
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28434401/ivermectin-to-reduce-malaria-transmission-i-pharmacokinetic-and-pharmacodynamic-considerations-regarding-efficacy-and-safety
#15
REVIEW
Carlos Chaccour, Felix Hammann, N Regina Rabinovich
Ivermectin is an endectocide that has been used broadly in single dose community campaigns for the control of onchocerciasis and lymphatic filariasis for more than 30 years. There is now interest in the potential use of ivermectin regimens to reduce malaria transmission, envisaged as community-wide campaigns tailored to transmission patterns and as complement of the local vector control programme. The development of new ivermectin regimens or other novel endectocides will require integrated development of the drug in the context of traditional entomological tools and endpoints...
April 24, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28433409/managing-anthelmintic-resistance-in-parascaris-spp-a-modelling-exercise
#16
Dave M Leathwick, Christian W Sauermann, Thomas Geurden, Martin K Nielsen
A previously described model for the dynamics of the parasitic stages of Parascaris spp. was modified to include eggs outside the host and the genetics of anthelmintic resistance before being used to address questions regarding the development of resistance. Three broad questions were addressed; i) How sustainable is the current common practice of treating foals monthly for their first year of life (i.e. 12 treatments/year)? ii) Does the timing of treatments have an effect on resistance development? (i.e. do certain treatments select for resistance more strongly than others?), and iii) How sustainable is the currently recommended strategy of targeting ascarid infections in foals with two treatments applied during the first five months of life? A range of variations within these broad questions were considered, such as the value in rotational deworming, whether larvicidal treatments are more selective for resistance, and whether combination anthelmintics should be introduced...
March 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28432479/pharmacokinetics-and-efficacy-of-an-ivermectin-implant-for-long-term-prevention-of-dirofilaria-immitis-infection-in-dogs
#17
Marco Genchi, Anne Geneteau, Patrick Forget, Romain Delcombel, Claudio Genchi
An exploratory study was carried out to assess the in vivo efficacy of different prototypes of subcutaneous implants containing ivermectin (IVM) for the prevention of canine Dirofilaria immitis infection. The implants consisted of an ethylcellulose matrix containing IVM (3.0, 4.5, and 6.0 mg/implant; from 0.29 to 0.63 mg/kg bw) as active ingredient designed to release approximately 0.1 ng of IVM/mL in the plasma for at least 12 months. Six dogs were implanted on day -365. On day -12, three heartworm-free dogs were included in the study as a control group...
April 22, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28428744/mutational-analysis-at-intersubunit-interfaces-of-an-anionic-glutamate-receptor-reveals-a-key-interaction-important-for-channel-gating-by-ivermectin
#18
Nurit Degani-Katzav, Revital Gortler, Marina Weissman, Yoav Paas
The broad-spectrum anthelmintic drug ivermectin (IVM) activates and stabilizes an open-channel conformation of invertebrate chloride-selective glutamate receptors (GluClRs), thereby causing a continuous inflow of chloride ions and sustained membrane hyperpolarization. These effects suppress nervous impulses and vital physiological processes in parasitic nematodes. The GluClRs are pentamers. Homopentameric receptors assembled from the Caenorhabditis elegans (C. elegans) GluClα (GLC-1) subunit can inherently respond to IVM but not to glutamate (the neurotransmitter)...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28420428/significant-heterogeneity-in-wolbachia-copy-number-within-and-between-populations-of-onchocerca-volvulus
#19
Samuel Armoo, Stephen R Doyle, Mike Y Osei-Atweneboana, Warwick N Grant
BACKGROUND: Wolbachia are intracellular bacteria found in arthropods and several filarial nematode species. The filarial Wolbachia have been proposed to be involved in the immunopathology associated with onchocerciasis. Higher Wolbachia-to-nematode ratios have been reported in the savannah-ecotype compared to the forest-ecotype, and have been interpreted as consistent with a correlation between Wolbachia density and disease severity. However, factors such as geographic stratification and ivermectin drug exposure can lead to significant genetic heterogeneity in the nematode host populations, so we investigated whether Wolbachia copy number variation is also associated with these underlying factors...
April 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28414672/a-strong-and-fortuitous-case-of-dyspnea
#20
R Hammer, M Sciaudone
CASE: A 48 year-old man with no past medical history was sent to our emergency department (ED); from a primary care clinic for hypertensive urgency of 200/130. The man reported an intermittent non-productive cough of approximately one year's duration and worsening dyspnea on exertion and orthopnea over the last month with lower extremity swelling. Of note, he emigrated from Honduras twenty years ago. Blood pressure normalized with administration of Lasix in the ED. Physical exam revealed rales in lung bases bilaterally, jugular venous distension, lower extremity pitting edema with serpiginous patches of erythema and excoriation, and a cardiac gallop...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
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