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https://www.readbyqxmd.com/read/29782894/screening-of-the-mmv-and-gsk-open-access-chemical-boxes-using-a-viability-assay-developed-against-the-kinetoplastid-crithidia-fasciculata
#1
Wakisa Kipandula, Simon A Young, Stuart A MacNeill, Terry K Smith
Diseases caused by the pathogenic kinetoplastids continue to incapacitate and kill hundreds of thousands of people annually throughout the tropics and sub-tropics. Unfortunately, in the countries where these neglected diseases occur, financial obstacles to drug discovery and technical limitations associated with biochemical studies impede the development of new, safe, easy to administer and effective drugs. Here we report the development and optimisation of a Crithidia fasciculata resazurin viability assay, which is subsequently used for screening and identification of anti-crithidial compounds in the MMV and GSK open access chemical boxes...
May 18, 2018: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/29780019/parasitic-infections-in-individuals-travelling-to-america-and-precautionary-measures
#2
Mehmet Aykur, Muhammet Karakavuk, Ayşegül Ünver, Hande Dağcı
Over the past decade, the number of international travels has increased. Hence, the risk of transmission of parasitic diseases has also increased. One of the risk infections is malaria; Plasmodium vivax and P. falciparum species can be transmitted. The distribution of leishmaniasis cases has been reported from the south of USA to the north of Argentina. Approximately 57,000 cases of cutaneous and mucocutaneous leishmaniasis occur annually, and approximately 4000 visceral leishmaniasis cases are observed. It is reported that Chagas disease is endemic in 21 countries, and approximately 6 million people are affected every year...
March 2018: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29780014/evaluation-of-in-vitro-and-in-vivo-drug-efficacy-over-leishmania-tropica-a-pilot-study
#3
Ahmet Özbilgin, İbrahim Çavuş, Ahmet Yıldırım, Tuğba Kaya, Hatice Ertabaklar
OBJECTIVE: Two pentavalent antimonials, meglumine antimoniate (Glucantime®, France) and sodium stibogluconate (Pentostam®, England), are used to treat cutaneous leishmaniasis (CL) in Turkey. The present study, serving as a guidebook for young researchers, aims to provide basis for conducting drug resistance tests and active ingredient scanning in in vitro and in vivo models. METHODS: A CL isolate kept in liquid nitrogen was initially thawed and genotyped by real-time polymerase chain reaction (PCR) using ITS1 prob...
March 2018: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29780009/parasitic-diseases-that-can-infect-travelers-to-africa
#4
Muhammet Karakavuk, Mehmet Aykur, Ayşegül Ünver, Mert Döşkaya
Travel is important in the spread of diseases, and the number of travelers is increasing daily. Therefore, the importance of the diseases that occur during or after travel is increasing. In underdeveloped countries in particular, parasitic diseases are epidemic or endemic, and these diseases lead to high numbers of deaths. People traveling from developed to underdeveloped countries have a higher risk of transmission of parasitic diseases during travel. Fifteen percent of the world's population lives in Africa...
May 21, 2018: Türkiye Parazitolojii Dergisi
https://www.readbyqxmd.com/read/29775824/is-urine-a-reliable-clinical-sample-for-the-diagnosis-of-human-visceral-leishmaniasis-a-systematic-review-and-meta-analysis
#5
REVIEW
Shabnam Asfaram, Saeed Hosseini Teshnizi, Mahdi Fakhar, Elham Sadat Banimostafavi, Masoud Soosaraei
Visualization of amastigotes in lymph nodes, bone marrow, and other tissues samples remains the gold standard method for the diagnosis of visceral leishmaniasis (VL) in humans. This gold standard diagnostic method uses a technically challenging microscopy procedure that is often not accessible in many places in the world where VL is endemic. Here, we report the current systematic review and meta-analysis to evaluate whether urine is a reliable clinical sample for diagnosis of human VL. Data were extracted from ten available databases during the period from 2002 to 2017...
May 15, 2018: Parasitology International
https://www.readbyqxmd.com/read/29775225/cytokines-and-chemokines-differentially-regulate-innate-immune-cell-trafficking-during-post-kala-azar-dermal-leishmaniasis
#6
Ashish K Singh, Vidya N R Das, Ajay Amit, Manas R Dikhit, Vijaya Mahantesh, Shubhankar K Singh, Shyam Naryan, Krishna Pandey, Pradeep Das, Neena Verma, Sanjiva Bimal
Post kala-azar dermal leishmaniasis (PKDL) is often considered to be the anthroponotic reservoir of visceral leishmaniasis (VL) in India. A better understanding of the host immune-response in dermal lesions of PKDL patients is therefore of utmost significance to minimize such patients and to restrict VL transmission. Although the innate immune response is known to play an important role in parasite clearance from dermal lesions, the actual contribution of innate cells to the pathogenicity of PKDL is poorly understood...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29774295/serological-investigation-of-visceral-leishmania-infection-in-human-and-its-associated-risk-factors-in-welkait-district-western-tigray-ethiopia
#7
Abrha Bsrat, Mebrahtu Berhe, Endalemaw Gadissa, Habtamu Taddele, Yohannes Tekle, Yohannes Hagos, Adugna Abera, Messele G/Micael, Tehetna Alemayhu, Getachew Gugsa, Abraham Aseffa
Visceral leishmaniasis (VL) is major neglected public health problem in terms of geographical spread and incidence in Ethiopia. Magnitude, public health impact and dynamics of VL were not well studied in Welkait District, Western Tigray, though the area is known for VL. Hence, this study aimed to determine sero-prevalence of human VL and associated risk factors in Welkait as new foci. A cross sectional study design was employed in this study. Two stage stratified random sampling method was used to select study participants...
February 2018: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29774290/urbanization-of-human-visceral-leishmaniasis-in-morocco
#8
Kholoud Kahime, Samia Boussaa, Haddou Nhammi, Ali Boumezzough
Human visceral leishmaniasis one of the seven most neglected tropical diseases in the world. In Morocco, HVL is widespread in all regions; but it is more common in the northern part with sporadic cases observed in the South. During the period between 2004 and 2013, the most affected Moroccan provinces were Taounate province, with 220 cases (16.09% of all cases), followed by Chefchaouen with 13.17% and Taza with 10.46% of the total cases. Children < 5 years old are the most affected age group, most cases registered were male...
November 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/29772890/application-of-decision-tree-for-prediction-of-cutaneous-leishmaniasis-incidence-based-on-environmental-and-topographic-factors-in-isfahan-province-iran
#9
Roghieh Ramezankhani, Nooshin Sajjadi, Roya Nezakati Esmaeilzadeh, Seyed Ali Jozi, Mohammad Reza Shirzadi
Cutaneous Leishmaniasis (CL) is a neglected tropical disease that continues to be a health problem in Iran. Nearly 350 million people are thought to be at risk. We investigated the impact of the environmental factors on CL incidence during the period 2007- 2015 in a known endemic area for this disease in Isfahan Province, Iran. After collecting data with regard to the climatic, topographic, vegetation coverage and CL cases in the study area, a decision tree model was built using the classification and regression tree algorithm...
May 8, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29770648/-challenge-and-strategy-of-prevention-and-control-of-important-parasitic-diseases-under-the-belt-and-road-initiative
#10
Cao Chun-Li, Guo Jia-Gang
China was once a country with the heaviest burden of parasitic diseases. Under the leadership of the Communist Party and national authority, after more than 60 years' efforts of prevention and control, the remarkable results have been achieved in China. However, affected by the social and economic development and environmental changes, the prevention and control of parasitic diseases, especially imported parasitic diseases, are facing new challenges, and the parasitic diseases, such as malaria, schistosomiasis, leishmaniasis, filariasis and trypanosomiasis, appear increasingly...
April 17, 2018: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/29770328/second-blood-meal-by-female-lutzomyia-longipalpis-enhancement-by-oviposition-and-its-effects-on-digestion-longevity-and-leishmania-infection
#11
C S Moraes, K Aguiar-Martins, S G Costa, P A Bates, R J Dillon, F A Genta
Lutzomyia longipalpis is the main vector of visceral leishmaniasis (VL) in America. Physiological and molecular mechanisms of Leishmania infection in sand flies have been studied during the first gonotrophic cycle. There are few studies about these interactions during the second gonotrophic cycle mainly because of the difficulties maintaining sand flies through sequential feeds. Here we standardized conditions to perform the second blood feed efficiently, and our results show that oviposition is an essential factor for the success of multiple feeds...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29768531/effect-of-vegetation-on-cutaneous-leishmaniasis-in-paran%C3%A3-brazil
#12
Helen Aline Melo, Diogo Francisco Rossoni, Ueslei Teodoro
BACKGROUND: Cutaneous leishmaniasis (CL) is endemic in the state of Paraná, Brazil. OBJECTIVE: This study aimed at analysing the influence of the remaining native vegetation on the prevalence of CL in Paraná. METHODS: Global testing was used for spatial autocorrelation along with simultaneous autoregressive model (SAR). The regression was based on the CL coefficient (cases/100,000 inhabitants) as a function of the percentage of natural vegetation cover, altitude, total number of cases, and spatial density (SD) per km2; the location data of the Paraná state municipalities and the detection coefficient (DC) (cases/100,000 inhabitants) of autochthonous cases of CL were obtained from the SINAN in 2012 and 2016...
May 14, 2018: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/29765969/cutaneous-leishmaniasis-a-case-involving-the-scalp-clinical-and-videodermoscopic-findings
#13
Carlos Daniel Sánchez Cárdenas, Yolanda Judith Álvarez Luna, Yesenia Bello Hernández, Daniel Asz Sigall, Roberto Arenas Guzmán
Cutaneous leishmaniasis (CL) is a worldwide infectious disease caused by flagellate protozoa of the genus Leishmania . In America, the species most commonly responsible for CL are L. mexicana and L. brasiliensis . Usually, in America, it is transmitted by sand flies mainly of the genus Lutzomyia and Psychodopygus . CL most commonly affects exposed areas and is characterized by an erythematous infiltrated and ulcerated papular or nodular lesion. We report a 28-year-old male, with a 6-month history and a previous trip to the forest in the south of Mexico...
April 2018: Skin Appendage Disorders
https://www.readbyqxmd.com/read/29765675/-leishmania-naiffi-and-leishmania-guyanensis-reference-genomes-highlight-genome-structure-and-gene-evolution-in-the-viannia-subgenus
#14
Simone Coughlan, Ali Shirley Taylor, Eoghan Feane, Mandy Sanders, Gabriele Schonian, James A Cotton, Tim Downing
The unicellular protozoan parasite Leishmania causes the neglected tropical disease leishmaniasis, affecting 12 million people in 98 countries. In South America, where the Viannia subgenus predominates, so far only L. ( Viannia ) braziliensis and L. ( V. ) panamensis have been sequenced, assembled and annotated as reference genomes. Addressing this deficit in molecular information can inform species typing, epidemiological monitoring and clinical treatment. Here, L. ( V. ) naiffi and L. ( V. ) guyanensis genomic DNA was sequenced to assemble these two genomes as draft references from short sequence reads...
April 2018: Royal Society Open Science
https://www.readbyqxmd.com/read/29764246/randomized-double-blind-study-on-intralesional-metronidazole-vs-intralesional-sodium-stibogluconate-in-l-donovani-cutaneous-leishmaniasis
#15
Vijani N Somaratne, Ranthilaka R Ranawaka, H M Jayaruwan, D M Wipuladasa, S H Padmal de Silva
OBJECTIVES: Aim of our study was to assess the efficacy of intralesional metronidazole on L. donovani cutaneous leishmaniasis (CL). MATERIAL AND METHODS: 188 patients with CL were randomly allocated to intralesional sodium stibogluconate (SSG) and intralesional metronidazole. Cure was assessed after 1-10 injections. Cure rates were assessed for statistical significance using Chi square test at p = 0.05 level (SLCTR/2014/028). RESULTS: When the treatment cut off was taken at 100%, the rate of cure for SSG (n = 64, 65...
May 15, 2018: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/29762040/orally-bioavailable-and-effective-buparvaquone-lipid-based-nanomedicines-for-visceral-leishmaniasis
#16
Lindsay A Smith, Dolores Remedios Serrano, Marion Mauger, Francisco Bolás-Fernández, Maria Auxiliadora Dea-Ayuela, Aikaterini Lalatsa
Nano-enabled lipid based drug delivery systems offer a platform to overcome challenges encountered with current failed leads in the treatment of parasitic and infectious diseases. When prepared with FDA or EMA approved excipients, they can be readily translated without the need for further toxicological studies, while they remain affordable and amenable to scale-up. Buparvaquone (BPQ), a hydroxynapthoquinone with in vitro activity in the nanomolar range, failed to clinically translate as a viable treatment for visceral leishmaniasis due to its poor oral bioavailability limited by its poor aqueous solubility (BCS Class II drug)...
May 15, 2018: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29761622/host-heme-oxygenase-1-friend-or-foe-in-tackling-pathogens
#17
REVIEW
Nisha Singh, Zeeshan Ahmad, Navin Baid, Ashwani Kumar
Infectious diseases are a major challenge in management of human health worldwide. Recent literature suggests that host immune system could be modulated to ameliorate the pathogenesis of infectious disease. Heme oxygenase (HMOX1) is a key regulator of cellular signaling and it could be modulated using pharmacological reagents. HMOX1 is a cytoprotective enzyme that degrades heme to generate carbon monoxide (CO), biliverdin, and molecular iron. CO and biliverdin (or bilirubin derived from it) can restrict the growth of a few pathogens...
May 14, 2018: IUBMB Life
https://www.readbyqxmd.com/read/29758517/identification-of-chalcone-based-antileishmanial-agents-targeting-trypanothione-reductase
#18
Margherita Ortalli, Andrea Ilari, Gianni Colotti, Ilenia De Ionna, Theo Battista, Alessandra Bisi, Silvia Gobbi, Angela Rampa, Rita M C Di Martino, Giovanna A Gentilomi, Stefania Varani, Federica Belluti
All currently used first-line and second-line drugs for the treatment of leishmaniasis exhibit several drawbacks including toxicity, high costs and route of administration. Furthermore, some drugs are associated with the emergence of drug resistance. Thus, the development of new treatments for leishmaniasis is a priority in the field of neglected tropical diseases. The present work highlights the use of natural derived products, i.e. chalcones, as potential source of antileishmanial agents. Thirty-one novel chalcone compounds have been synthesized and their activity has been evaluated against promastigotes of Leishmania donovani; 16 compounds resulted active against L...
May 2, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29758050/an-assessment-of-false-positive-rates-for-malaria-rapid-diagnostic-tests-caused-by-non-plasmodium-infectious-agents-and-immunological-factors
#19
Michelle L Gatton, Sadmir Ciketic, John W Barnwell, Qin Cheng, Peter L Chiodini, Sandra Incardona, David Bell, Jane Cunningham, Iveth J González
BACKGROUND: Malaria rapid diagnostic tests (RDTs) can produce false positive (FP) results in patients with human African trypanosomiasis and rheumatoid factor (RF), but specificity against other infectious agents and immunological factors is largely unknown. Low diagnostic specificity caused by cross-reactivity may lead to over-estimates of the number of malaria cases and over-use of antimalarial drugs, at the cost of not diagnosing and treating the true underlying condition. METHODS: Data from the WHO Malaria RDT Product Testing Programme was analysed to assess FP rates of 221 RDTs against four infectious agents (Chagas, dengue, Leishmaniasis and Schistosomiasis) and four immunological factors (anti-nuclear antibody, human anti-mouse antibody (HAMA), RF and rapid plasma regain)...
2018: PloS One
https://www.readbyqxmd.com/read/29758031/the-mass-use-of-deltamethrin-collars-to-control-and-prevent-canine-visceral-leishmaniasis-a-field-effectiveness-study-in-a-highly-endemic-area
#20
Bruna Martins Macedo Leite, Manuela da Silva Solcà, Liliane Celestino Sales Santos, Lívia Brito Coelho, Leila Denise Alves Ferreira Amorim, Lucas Edel Donato, Sandra Maria de Souza Passos, Adriana Oliveira de Almeida, Patrícia Sampaio Tavares Veras, Deborah Bittencourt Mothé Fraga
BACKGROUND: Visceral leishmaniasis (VL) is a zoonosis of great importance. Limitations in current VL control measures compromise efficacy, indicating the need to implement new strategies. The aim of this study was to evaluate the effectiveness of the mass use of deltamethrin-impregnated collars in dogs as a public health measure to control and prevent canine visceral leishmaniasis (CVL). METHODOLOGY: An interventional study was implemented in two endemic areas in the district of Monte Gordo (Bahia-Brazil): an intervention area, in which VL seronegative dogs were collared, and a control area in which only conventional CVL control measures were applied...
May 14, 2018: PLoS Neglected Tropical Diseases
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