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https://www.readbyqxmd.com/read/28741648/american-cutaneous-leishmaniasis-in-infancy-and-childhood
#1
REVIEW
Alberto E Paniz-Mondolfi, Carolina Talhari, María F García Bustos, Tamara Rosales, Wilmer E Villamil-Gomez, Marilianna Marquez, Alexandra M Pérez Alvarez, Alejandra I Tálamo Sánchez, Alfonso J Rodriguez-Morales
Infant and young child skin diseases are among the most common features of morbidity throughout the tropics. Because the skin is directly exposed to the environment, it is considerably affected by climatic and local conditions such as vectors and microorganisms, as in the case of leishmaniasis. In America the observed magnitude of cutaneous leishmaniasis in children has led to the study of increased risk of exposure of this group due to the possibility of peri- and intradomiciliary transmission. The present review pretends to make a concrete approach all through the broad and main figures of this parasitic disease, including the clinical, physiopathological, epidemiological, diagnostic, and therapeutic aspects, in order to be used as a practical source of reference for pediatricians leading with tropical cutaneous pathology in the region...
July 25, 2017: International Journal of Dermatology
https://www.readbyqxmd.com/read/28738881/assessment-of-quality-of-life-in-patients-with-post-kalaazar-dermal-leishmaniasis
#2
Biplab Pal, Krishna Murti, Niyamat Ali Siddiqui, Pradeep Das, Chandra Shekhar Lal, Rajendra Babu, Manoj Kumar Rastogi, Krishna Pandey
BACKGROUND: Post kala-azar dermal leishmaniasis (PKDL) is a dermatological disorder caused by protozoal parasite Leishmania donovani. PKDL cases are thought to be a reservoir of parasites and may increase cases of visceral leishmaniasis. The disease is not life threatening but cosmetic disfigurement associated with it may impair the patients' quality of life. This study aimed to assess the health related quality of life in patients with post kalaazar dermal leishmanasis for the first time...
July 24, 2017: Health and Quality of Life Outcomes
https://www.readbyqxmd.com/read/28738234/m1-homeopathic-complex-trigger-effective-responses-against-leishmania-l-amazonensis-in-vivo-and-in-vitro
#3
Katia Fialho Nascimento, Fabiana Rodrigues de Santana, Cleber Rafael Vieira da Costa, Vanessa Kaplum, Helito Volpato, Celso Vaturo Nakamura, Leoni Villano Bonamin, Dorly de Freitas Buchi
Leishmaniasis is a term referring to a range of clinical conditions caused by protozoan parasites of the genus Leishmania, Trypanosomatidae family, Kinetoplastida order that is transmitted by the bite of certain species of mosquitoes Phlebotominae subfamily. These parasites infect hosts wild and domestic mammals, considered as natural reservoirs and can also infect humans. Leishmania are obligate intramacrophage protozoa that have exclusively intracellular life style. This suggests that the amastigotes possess mechanisms to avoid killing by host cells...
July 21, 2017: Cytokine
https://www.readbyqxmd.com/read/28737879/-visceral-leishmaniasis-pediatric-case-report
#4
Andrés Gomila H, Carolina Vanzo, Analía Garnero, Luisina Peruzzo, Mónica Badalotti
La leishmaniasis es una enfermedad causada por parásitos obligados intracelulares pertenecientes al género Leishmania y que reconoce tres formas clínicas principales: cutánea, visceral y mucocutánea. Es una patología del grupo de las "enfermedades desatendidas". Es la única enfermedad tropical transmitida a través de vectores que se ha mantenido endémica por décadas en el sur de Europa. La leishmaniasis visceral representa la forma más grave. Se caracteriza por fiebre, pérdida de peso, anemia y hepatoesplenomegalia...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28737116/apoptotic-induction-induces-leishmania-aethiopica-and-l-mexicana-spreading-in-terminally-differentiated-thp-1-cells
#5
Rajeev Rai, Paul Dyer, Simon Richardson, Laurence Harbige, Giulia Getti
Leishmaniasis develops after parasites establish themselves as amastigotes inside mammalian cells and start replicating. As relatively few parasites survive the innate immune defence, intracellular amastigotes spreading towards uninfected cells is instrumental to disease progression. Nevertheless the mechanism of Leishmania dissemination remains unclear, mostly due to the lack of a reliable model of infection spreading. Here, an in vitro model representing the dissemination of Leishmania amastigotes between human macrophages has been developed...
July 24, 2017: Parasitology
https://www.readbyqxmd.com/read/28735574/multicentre-evaluation-of-a-direct-agglutination-test-prototype-kit-dat-lpc-for-diagnosis-of-visceral-leishmaniasis
#6
E Oliveira, D Oliveira, F A Cardoso, J R Barbosa, A P Marcelino, T Dutra, T Araujo, L Fernandes, D Duque, A Rabello
In this study, we assessed the sensitivity, specificity, and diagnostic accuracy of a previously developed direct agglutination test (DAT) using a freeze-dried antigen derived from Leishmania infantum promastigotes and composed in a prototype kit for visceral leishmaniasis (VL) diagnosis, named DAT-LPC. To evaluate DAT-LPC reproducibility, the kit was used to analyse 207 serum samples from VL patients and 80 serum samples from patients with other parasitic infections or healthy subjects in four laboratories from different public health institutions in Brazil...
July 24, 2017: Parasitology
https://www.readbyqxmd.com/read/28733676/after-infection-with-leishmania-infantum-golden-hamsters-mesocricetus-auratus-become-more-attractive-to-female-sand-flies-lutzomyia-longipalpis
#7
T M Nevatte, R D Ward, L Sedda, J G C Hamilton
In Brazil, human and canine visceral leishmaniasis is caused by infection with Leishmania infantum, a Protist parasite transmitted by blood-feeding female Lutzomyia longipalpis sand flies. The objective of this study was to determine if the odour of hamsters, infected with Le. infantum, was more attractive than the odour of the same hamsters, before they were infected. The attractiveness of odour collected from individual hamsters (n = 13), before they were infected, was compared in a longitudinal study, with the attractiveness of the odour of the same hamster in a Y-tube olfactometer bioassay, at a late stage of infection...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28732017/disease-severity-in-patients-with-visceral-leishmaniasis-is-not-altered-by-co-infection-with-intestinal-parasites
#8
Fitsumbrhan Tajebe, Mulusew Getahun, Emebet Adem, Asrat Hailu, Mulualem Lemma, Helina Fikre, John Raynes, Aschalew Tamiru, Zemenay Mulugeta, Ermias Diro, Frederic Toulza, Ziv Shkedy, Tadesse Ayele, Manuel Modolell, Markus Munder, Ingrid Müller, Yegnasew Takele, Pascale Kropf
Visceral leishmaniasis (VL) is a neglected tropical disease that affects the poorest communities and can cause substantial morbidity and mortality. Visceral leishmaniasis is characterized by the presence of Leishmania parasites in the spleen, liver and bone marrow, hepatosplenomegaly, pancytopenia, prolonged fever, systemic inflammation and low body mass index (BMI). The factors impacting on the severity of VL are poorly characterized. Here we performed a cross-sectional study to assess whether co-infection of VL patients with intestinal parasites influences disease severity, assessed with clinical and haematological data, inflammation, cytokine profiles and BMI...
July 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28731592/arginase-activity-of-leishmania-isolated-from-patients-with-cutaneous-leishmaniasis
#9
Alireza Badirzadeh, Tahereh Taheri, Fatemeh Abedi-Astaneh, Yasaman Taslimi, Zahra Abdossamadi, Hossein Montakhab-Yeganeh, Maryam Aghashahi, Maryam Niyyati, Sima Rafati
Cutaneous leishmaniasis (CL) is one of the most important vector-borne parasitic diseases, highly endemic in Iran, and its prevalence is increasing all over the country. Arginase (ARG) activity in isolated Leishmania parasites from CL patients is yet to be explored. This study aimed to compare the ARG activity of isolated Leishmania promastigotes from CL patients with a standard strain of L. major and its influences on the disease pathogenesis. We recruited 16 confirmed CL patients from Qom province, in central Iran; after detection of Leishmania species using PCR-RFLP, we assessed the levels of ARG in the isolated promastigotes and determined the parasites' growth rate...
July 21, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28730958/engineering-synergistically-active-and-bioavailable-cost-effective-medicines-for-neglected-tropical-diseases-the-role-of-excipients
#10
Dolores R Serrano, Aikaterini Lalatsa, M Auxiliadora Dea-Ayuela
Leishmaniasis is a neglected tropical disease responsible for the ninth largest disease burden in the world threatening 350 million people mostly in developing countries. The lack of efficacy, severe adverse effects, long duration, high cost and parenteral administration of the current therapies result in poor patient compliance and emergence of resistance. Leishmaniasis' unmet need for safer, affordable and more effective treatments is only partly addressed by today's global health product pipeline that focuses on products amenable to rapid clinical development, mainly by reformulating or repurposing existing drugs for new uses...
July 19, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28726597/serological-and-molecular-diagnostic-tests-for-canine-visceral-leishmaniasis-in-brazilian-endemic-area-one-out-of-five-seronegative-dogs-are-infected
#11
E G Lopes, A P Sevá, F Ferreira, C M Nunes, L B Keid, R M Hiramoto, H L Ferreira, T M F S Oliveira, M F D Bigotto, F Galvis-Ovallos, E A B Galati, R M Soares
Euthanasia of infected dogs is one of the measures adopted in Brazil to control visceral leishmaniasis (VL) in endemic areas. To detect infected dogs, animals are screened with the rapid test DPP® Visceral Canine Leishmaniasis for detection of antibodies against K26/K39 fusion antigens of amastigotes (DPP). DPP-positives are confirmed with an immunoenzymatic assay probing soluble antigens of promastigotes (ELISA), while DPP-negatives are considered free of infection. Here, 975 dogs from an endemic region were surveyed by using DPP, ELISA and real-time PCR (qPCR) for the diagnosis of VL...
July 20, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28724559/identification-of-leishmania-by-maldi-tof-mass-spectrometry-using-a-free-web-based-application-and-a-dedicated-mass-spectral-library
#12
Laurence Lachaud, Anna Fernández-Arévalo, Anne Cécile Normand, Patrick Lami, Cécile Nabet, Jean Luc Donnadieu, Martine Piarroux, Farid Djenad, Carole Cassagne, Christophe Ravel, Silvia Tebar, Teresa Llovet, Denis Blanchet, Magalie Demar, Zoubir Harrat, Karim Aoun, Patrick Bastien, Carmen Muñoz, Montserrat Gállego, Renaud Piarroux
Human leishmaniasis are widely spread diseases with different clinical forms caused by about 20 species within the Leishmania genus. Leishmania species identification is relevant for therapeutic management and prognosis, especially for cutaneous and muco-cutaneous forms. Several methods are available to identify Leishmania species from culture, but they have not been standardized for the majority of the currently described species, with the exception of MultiLocus Enzyme Electrophoresis. Moreover, these techniques are expensive, time-consuming and not available in all laboratories...
July 19, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28722607/mucosal-leishmaniasis-a-retrospective-study-of-327-cases-from-an-endemic-area-of-leishmania-viannia-braziliensis
#13
Carolina Cincurá, Clara Mônica F de Lima, Paulo R L Machado, Jamary Oliveira-Filho, Marshall J Glesby, Marcus M Lessa, Edgar M Carvalho
Mucosal leishmaniasis (ML) is observed only in about 3% of patients with American tegumentary leishmaniasis (ATL) but has a high potential for destructive, disfiguring, and disabling sequelae. Prior reports of clinical and epidemiologic features of ML are limited by small numbers of cases. In this study, we evaluated changes in the demographic features and clinical presentation of ML in an endemic area of Leishmania braziliensis transmission over a period of 20 years. The charts of 327 patients with ML diagnosed between 1995 and 2014 were reviewed...
July 10, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28721666/erratum-to-vosalophen-a-vanadium-complex-with-a-stilbene-derivative-induction-of-apoptosis-autophagy-and-efficiency-in-experimental-cutaneous-leishmaniasis
#14
Patrícia de A Machado, Jessica O F Moraes, Gustavo S G Carvalho, Wallace P Lima, Gilson C Macedo, Elizandra A Britta, Celso V Nakamura, Adilson D da Silva, Alexandre Cuin, Elaine S Coimbra
No abstract text is available yet for this article.
July 18, 2017: Journal of Biological Inorganic Chemistry: JBIC
https://www.readbyqxmd.com/read/28719960/evaluation-of-boldine-activity-against-intracellular-amastigotes-of-leishmania-amazonensis
#15
Isabel Cristina Salama, Cristina Arrais-Lima, Wagner Welber Arrais-Silva
Leishmaniasis is a neglected and endemic disease that affects poorest population mainly in developing countries. A lack of adequate and definitive chemotherapeutic agents to fight against this infection has led to the investigation of numerous compounds. The aim of this study was to investigate in vitro activity of boldine against Leishmania amazonensis murine cell infection. Boldine ((S)-2,9-dihydroxy-1,10-dimethoxy-aporphine) is an aporphine alkaloid found abundantly in the leaves/bark of boldo (Peumus boldus Molina), a widely distributed tree native to Chile...
June 2017: Korean Journal of Parasitology
https://www.readbyqxmd.com/read/28719882/antileishmanial-activity-and-tubulin-polymerization-inhibition-of-podophyllotoxin-derivatives-on-leishmania-infantum
#16
José Miguel Escudero-Martínez, Yolanda Pérez-Pertejo, Rosa M Reguera, María Ángeles Castro, María Victoria Rojo, Carolina Santiago, Andrés Abad, Pablo Anselmo García, José Luis López-Pérez, Arturo San Feliciano, Rafael Balaña-Fouce
Leishmania microtubules play an important role not only in cell division, but also in keeping the shape of the parasite and motility of its free-living stages. Microtubules result from the self-assembly of alpha and beta tubulins, two phylogenetically conserved and very abundant eukaryotic proteins in kinetoplastids. The colchicine binding domain has inspired the discovery and development of several drugs currently in clinical use against parasites. However, this domain is less conserved in kinetoplastids and may be selectively targeted by new compounds...
June 28, 2017: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/28719307/first-report-on-natural-infection-of-phlebotomus-sergenti-with-leishmania-tropica-in-a-classical-focus-of-leishmania-major-in-tunisia
#17
Kaouther Jaouadi, Jihene Bettaieb, Amira Bennour, Sadok Salem, Mohamed Ridha Rjeibi, Sana Chaabane, Rihab Yazidi, Neila Khabouchi, Adel Gharbi, Afif Ben Salah
In Tunisia, chronic cutaneous leishmaniasis due to Leishmania tropica is an important health problem. Its spreading has not been fully elucidated. Information on sandfly vectors, as well as their associated Leishmania species, is of paramount importance since vector dispersion is one of the major factors responsible for pathogen dissemination. Ninety-seven unfed females belonging to the genera Sergentomyia and Phlebotomus were collected between June and August 2015 using sticky paper traps. Polymerase chain reaction-restriction fragment length polymorphism analysis of the internal transcribed spacer 1and sequencing were used for Leishmania detection and identification...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28719266/serological-and-molecular-analysis-of-leishmania-infection-in-healthy-individuals-from-two-districts-of-west-bengal-india-endemic-for-visceral-leishmaniasis
#18
Himanshu Kaushal, Sujit Kumar Bhattacharya, Sandeep Verma, Poonam Salotra
AbstractSeveral epidemiological studies have indicated the presence of asymptomatic infections with Leishmania donovani in the Indian subcontinent, where parasite transmission is considered anthroponotic. In India, such asymptomatic Leishmania cases have been identified in the state of Bihar. We explored here, the presence of asymptomatic Leishmania infection among healthy individuals living in two districts in the state of West Bengal, India, using serological and molecular tests. Blood samples of 246 healthy individuals were collected from nine villages of Malda and Murshidabad districts in West Bengal, considered endemic for visceral leishmaniasis (VL)...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716015/illegal-gold-miners-in-french-guiana-a-neglected-population-with-poor-health
#19
Maylis Douine, Emilie Mosnier, Quentin Le Hingrat, Charlotte Charpentier, Florine Corlin, Louise Hureau, Antoine Adenis, Yassamine Lazrek, Florence Niemetsky, Anne-Laure Aucouturier, Magalie Demar, Lise Musset, Mathieu Nacher
BACKGROUND: In French Guiana, a French overseas territory in South America, 6 to 10 thousands undocumented persons work illegally in gold mining sites in the Amazonian forest. Precarious life conditions lead to poor health but few data exist on the health status of illegal gold miners in French Guiana. The objective of this article was to describe the sociodemographic and health status of this vulnerable population. METHOD: A prospective cross-sectional survey was conducted in 2015 on gold mine supply sites at the border between French Guiana and Suriname...
July 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28715422/unraveling-the-genetic-diversity-and-phylogeny-of-leishmania-rna-virus-1-strains-of-infected-leishmania-isolates-circulating-in-french-guiana
#20
Sourakhata Tirera, Marine Ginouves, Damien Donato, Ignacio S Caballero, Christiane Bouchier, Anne Lavergne, Eliane Bourreau, Emilie Mosnier, Vincent Vantilcke, Pierre Couppié, Ghislaine Prevot, Vincent Lacoste
INTRODUCTION: Leishmania RNA virus type 1 (LRV1) is an endosymbiont of some Leishmania (Vianna) species in South America. Presence of LRV1 in parasites exacerbates disease severity in animal models and humans, related to a disproportioned innate immune response, and is correlated with drug treatment failures in humans. Although the virus was identified decades ago, its genomic diversity has been overlooked until now. METHODOLOGY/PRINCIPLES FINDINGS: We subjected LRV1 strains from 19 L...
July 17, 2017: PLoS Neglected Tropical Diseases
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