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cutaneous leishmaniasis

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https://www.readbyqxmd.com/read/28731592/arginase-activity-of-leishmania-isolated-from-patients-with-cutaneous-leishmaniasis
#1
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/28724559/identification-of-leishmania-by-maldi-tof-mass-spectrometry-using-a-free-web-based-application-and-a-dedicated-mass-spectral-library
#2
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
#3
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
#4
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/28719307/first-report-on-natural-infection-of-phlebotomus-sergenti-with-leishmania-tropica-in-a-classical-focus-of-leishmania-major-in-tunisia
#5
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/28715422/unraveling-the-genetic-diversity-and-phylogeny-of-leishmania-rna-virus-1-strains-of-infected-leishmania-isolates-circulating-in-french-guiana
#6
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
https://www.readbyqxmd.com/read/28713561/case-report-lupoid-cutaneous-leishmaniasis-mimicking-verruca-plana
#7
Emin Ozlu, Aysegul Baykan, Ozan Yaman, Ragıp Ertas, Mustafa Atasoy, Kemal Ozyurt, Abdullah Turasan, Nazan Taslıdere
Cutaneous leishmaniasis (CL) is an infectious disease caused by various species of leishmania protozoan parasites. Lupoid CL is a rare form of CL that has a stunning similarity to other granulomatous cutaneous conditions of infectious or inflammatory origin. Verruca plana, also known as a "flat wart", is a benign proliferation of the skin resulting from infection with human papilloma virus (HPV). Herein, we presented a case of lupoid CL mimicking verruca plana on the face.
2017: F1000Research
https://www.readbyqxmd.com/read/28712974/diversity-and-altitudinal-distribution-of-phlebotomine-sand-flies-diptera-psychodidae-in-visceral-leishmaniasis-endemic-areas-of-northwest-ethiopia
#8
Solomon Yared, Araya Gebreselassie, Essayas Akililu, Kebede Deribe, Meshesha Balkew, Alon Warburg, Asrat Hailu, Teshome Gebre-Michael
BACKGROUND: The Leishmaniases are caused by the protozoan parasites of the genus Leishmania and are transmitted to humans by the bite of infected female phlebotomine sand flies. Both visceral and cutaneous leishmaniases are widely distributed in different parts of Ethiopia. The aim of this study was to determine the diversity and altitudinal distribution of phlebotomine sand flies from Kafta Humera to Gondar town in northwest Ethiopia. METHODS: Seven localities were selected with distinct altitudinal variations between 550m above sea level (m a...
July 13, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28712122/clinical-features-and-treatment-response-of-cutaneous-leishmaniasis-in-north-west-ethiopia
#9
Helina Fikre, Rezika Mohammed, Saba Atinafu, Johan van Griensven, Ermias Diro
OBJECTIVE: Cutaneous leishmaniasis (CL) receives far less attention than visceral leishmaniasis. Nevertheless, CL is predominantly caused by a unique species in Ethiopia (L aethiopica), which is known to cause severe forms such as diffuse (DCL) and mucocutaneous leishmaniasis (MCL). We report on the number and type of CL cases diagnosed, the clinical features, the treatments and treatment outcomes in North-West Ethiopia. METHODS: This is a retrospective chart record analysis of CL patients treated at the Leishmania Research and Treatment Center (LRTC) of the University of Gondar, Ethiopia...
July 16, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28709468/il-32%C3%AE-promotes-the-healing-of-murine-cutaneous-lesions-caused-by-leishmania-braziliensis-infection-in-contrast-to-leishmania-amazonensis
#10
Rodrigo Saar Gomes, Muriel Vilela Teodoro Silva, Jéssica Cristina Dos Santos, Lucas Luiz de Lima Silva, Aline Carvalho Batista, Juliana Reis Machado, Mauro Martins Teixeira, Miriam Leandro Dorta, Milton Adriano Pelli de Oliveira, Charles A Dinarello, Leo A B Joosten, Fátima Ribeiro-Dias
BACKGROUND: Interleukin 32 (IL-32) is a pro-inflammatory cytokine induced in patients with American tegumentary leishmaniasis (ATL) caused by Leishmania braziliensis. Here, we investigated whether IL-32 is also expressed in patient lesions caused by L. amazonensis. In addition, we evaluated experimental L. amazonensis and L. braziliensis infections in C57BL/6 transgenic mice for human IL-32γ (IL-32γTg) in comparison with wild-type (WT) mice that do not express the IL-32 gene. RESULTS: Human cutaneous lesions caused by L...
July 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28704646/skin-dysbiosis-goes-off-leish
#11
Tiffany C Scharschmidt
There is increasing interest in the contribution of microbes to skin disease. In this issue of Cell Host & Microbe, Gimblet et al. (2017) demonstrate that cutaneous leishmaniasis alters the human skin microbiota. In mice, this dysbiosis is transferable to naive animals, where it augments skin inflammation and disease severity.
July 12, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28704463/a-novel-non-invasive-diagnostic-sampling-technique-for-cutaneous-leishmaniasis
#12
Yasaman Taslimi, Pardis Sadeghipour, Sima Habibzadeh, Vahid Mashayekhi, Hossien Mortazavi, Ingrid Müller, Majella E Lane, Pascale Kropf, Sima Rafati
Accurate diagnosis of cutaneous leishmaniasis (CL) is important for chemotherapy and epidemiological studies. Common approaches for Leishmania detection involve the invasive collection of specimens for direct identification of amastigotes by microscopy and the culturing of promastigotes from infected tissues. Although these techniques are highly specific, they require highly skilled health workers and have the inherent risks of all invasive procedures, such as pain and risk of bacterial and fungal super-infection...
July 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28704369/clinical-and-parasitological-factors-in-parasite-persistence-after-treatment-and-clinical-cure-of-cutaneous-leishmaniasis
#13
Alvaro J Martínez-Valencia, Carlos Frisherald Daza-Rivera, Mariana Rosales-Chilama, Alexandra Cossio, Elkin J Casadiego Rincón, Mayur M Desai, Nancy Gore Saravia, María Adelaida Gómez
BACKGROUND: The determinants of parasite persistence or elimination after treatment and clinical resolution of cutaneous leishmaniasis (CL) are unknown. We investigated clinical and parasitological parameters associated with the presence and viability of Leishmania after treatment and resolution of CL caused by L. Viannia. METHODS: Seventy patients who were treated with meglumine antimoniate (n = 38) or miltefosine (n = 32) and cured, were included in this study...
July 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28690662/parasite-killing-of-leishmania-v-braziliensis-by-standardized-propolis-extracts
#14
Jéssica Rebouças-Silva, Fabiana S Celes, Jonilson Berlink Lima, Hernane S Barud, Camila I de Oliveira, Andresa A Berretta, Valéria M Borges
Treatments based on antimonials to cutaneous leishmaniasis (CL) entail a range of toxic side effects. Propolis, a natural compound widely used in traditional medical applications, exhibits a range of biological effects, including activity against infectious agents. The aim of this study was to test the potential leishmanicidal effects of different propolis extracts against Leishmania (Viannia) braziliensis promastigotes and intracellular amastigotes in vitro. Stationary-phase L. (V) braziliensis promastigotes were incubated with medium alone or treated with dry, alcoholic, or glycolic propolis extract (10, 50, or 100 μg/mL) for 96 h...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28687071/recurrence-of-visceral-and-muco-cutaneous-leishmaniasis-in-a-patient-under-immunosuppressive-therapy
#15
Gilles Darcis, Gert Van der Auwera, Jean-Baptiste Giot, Marie-Pierre Hayette, Françoise Tassin, Jorge Arrese Estrada, Lieselotte Cnops, Michel Moutschen, Laurence de Leval, Philippe Leonard
BACKGROUND: Leishmaniasis is a protozoan disease caused by parasites of the genus Leishmania, transmitted to humans by sandflies. The diagnosis of leishmaniasis is often challenging as it mimics many other infectious or malignant diseases. The disease can present in three ways: cutaneous, mucocutaneous, or visceral leishmaniasis, which rarely occur together or consecutively. CASE PRESENTATION: The patient was a 52 years old immunosuppressed Belgian woman with a long history of severe rheumatoid arthritis...
July 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28686398/-leishmaniasis-an-infection-of-travellers-and-migrants
#16
Lena Jessen, Benoît Bard, Xavier Grenon, Frank Bally
Leishmaniasis is an infection of the tropical to temperate zone, occasionally imported in our regions by travellers and migrants. Leishmania parasites are transmitted by the sting of a sand fly, Phlebotomus or Lutzomyia, and causes two clinical syndromes with either cutaneous, also mucosal, or disseminated involvement. Clinical suspicion needs a confirmation by the detection of the parasite. The treatment is adapted to the patient, the clinical presentation, the region, the species and the availability. Cutaneous leishmaniasis can be observed only or treated by topical or systemic regimens...
October 12, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28676088/parasitological-and-biochemical-studies-on-cutaneous-leishmaniasis-in-shara-b-district-taiz-yemen
#17
Qhtan Asmaa, Salwa Al-Shamerii, Mohammed Al-Tag, Adam Al-Shamerii, Yiping Li, Bashir H Osman
BACKGROUND: The leishmaniasis is a group of diseases caused by intracellular haemoflagellate protozoan parasites of the genus Leishmania. Leishmaniasis has diverse clinical manifestations; cutaneous leishmaniasis (CL) is the most common form of leishmaniasis which is responsible for 60% of disability-adjusted life years. CL is endemic in Yemen. In Shara'b there is no reference study available to identify the prevalence of endemic diseases and no investigation has been conducted for diagnosing the diseases...
July 4, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28670974/cutaneous-leucocytoclastic-vasculitis-in-visceral-leishmaniasis
#18
Farzana Shumy, Ahmad Mursel Anam, Ma Jalil Chowdhury
No abstract text is available yet for this article.
January 1, 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28669672/cutaneous-leishmaniasis-induces-a-transmissible-dysbiotic-skin-microbiota-that-promotes-skin-inflammation
#19
Ciara Gimblet, Jacquelyn S Meisel, Michael A Loesche, Stephen D Cole, Joseph Horwinski, Fernanda O Novais, Ana M Misic, Charles W Bradley, Daniel P Beiting, Shelley C Rankin, Lucas P Carvalho, Edgar M Carvalho, Phillip Scott, Elizabeth A Grice
Skin microbiota can impact allergic and autoimmune responses, wound healing, and anti-microbial defense. We investigated the role of skin microbiota in cutaneous leishmaniasis and found that human patients infected with Leishmania braziliensis develop dysbiotic skin microbiota, characterized by increases in the abundance of Staphylococcus and/or Streptococcus. Mice infected with L. major exhibit similar changes depending upon disease severity. Importantly, this dysbiosis is not limited to the lesion site, but is transmissible to normal skin distant from the infection site and to skin from co-housed naive mice...
June 22, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28668672/amiodarone-and-itraconazole-improve-the-activity-of-pentavalent-antimonial-in-the-treatment-of-experimental-cutaneous-leishmaniasis
#20
Laís Anversa, Monique Gomes Salles Tiburcio, Lara Rocha Batista, Marília Beatriz Cuba, Gabriel Antonio Nogueira Nascentes, Tábata Yamasaki Martins, Virgínia Bodelão Richini Pereira, Luciana da Silva Ruiz Menezes, Valdo José Dias da Silva, Luis Eduardo Ramirez
Leishmaniasis affect millions of people, causing morbidity and mortality, especially in developing tropical and subtropical countries. Unfortunately, the possibilities of treatment for these infections are still quite limited and most of the available drugs present serious side effects. The objective of this paper was to evaluate the therapeutic role of amiodarone and itraconazole in the treatment of cutaneous leishmaniasis caused by Leishmania (Leishmania) amazonensis. In order to perform this evaluation, hamsters were infected with 1 x 10(6) metaciclic promastigotes of the parasite in the hind footpad and, after the onset of the lesions, were treated with glucantime, amiodarone, itraconazole, glucantime and amiodarone, glucantime and itraconazole or amiodarone and itraconazole...
June 28, 2017: International Journal of Antimicrobial Agents
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