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https://www.readbyqxmd.com/read/28527882/new-epidemiological-pattern-of-cutaneous-leishmaniasis-in-two-pre-saharan-arid-provinces-southern-morocco
#1
Mouad Ait Kbaich, Idriss Mhaidi, Abdelkacem Ezzahidi, Nouredine Dersi, Adil El Hamouchi, Myriam Riyad, Khadija Akarid, Meryem Lemrani
Three Leishmania species are responsible of cutaneous leishmaniasis (CL) in Morocco. Zoonotic CL due to Leishmania major and Leishmania infantum, the first is known as established in the eastern arid regions, whereas the latter evolves sporadically, especially in the North. While Leishmania tropica, classically considered anthroponotic, is endemic in the semi-arid regions and is largely distributed throughout the country. The aim of this study was to identify the Leishmania species causing CL in two Provinces in arid pre-Saharan region known as zoonotic CL foci, and to contribute an update to the national data concerning the distribution of Leishmania species in both regions...
May 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28501450/exploring-prognosis-in-chronic-relapsing-visceral-leishmaniasis-among-hiv-infected-patients-circulating-leishmania-dna
#2
Gláucia Fernandes Cota, Marcos Roberto de Sousa, Tália Santana Machado de Assis, Bruna Fernandes Pinto, Ana Rabello
BACKGROUND: Visceral leishmaniasis (VL) affecting HIV-infected patients is considered a challenging condition because of its high mortality and relapse rates. The approach of this condition is still surrounded by many uncertainties, especially regarding the criteria to institute and discontinue secondary prophylaxis for VL. The aim of this study was to evaluate the Leishmania parasitism kinetic assessed by polymerase chain reaction (PCR) as a possible tool in the prognostic assessment in a context in which patients are receiving highly active antiretroviral therapy and secondary prophylaxis...
May 10, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28490252/visceral-leishamiosis-in-immunocompromised-host-an-update-and-literature-review
#3
Pasquale Pagliano, Silvano Esposito
Visceral leishmaniasis (VL) is a chronic infectious disease endemic in tropical and sub-tropical areas including the Mediterranean basin, caused by a group of protozoan parasites of the genus Leishmania and transmitted by phlebotomine sandflies. Immunocompromised patients, in particular HIV positive, are considered at risk of VL. They report atypical signs and poor response to treatment due to impairment of T-helper and regulatory cells activity. Laboratory diagnosis is based on microscopy on bone marrow or spleen aspirates...
May 10, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28487000/experimental-mixed-infection-of-leishmania-leishmania-amazonensis-and-leishmania-l-infantum-in-hamsters-mesocricetus-auratus
#4
Jordanna Luíza DE Lima Celeste, Ana Paula Venuto Moura, João Carlos França-Silva, Gabriela Matos DE Sousa, Soraia Oliveira Silva, Maria Norma Melo, Wagner Luiz Tafuri, Carolina Carvalho Souza, Hélida Monteiro DE Andrade
In South America, visceral leishmaniasis is frequently caused by Leishmania infantum and, at an unknown frequency, by Leishmania amazonensis. Therefore, mixed infections with these organisms are possible. Mixed infections might affect the clinical course, immune response, diagnosis, treatment and epidemiology of the disease. Here we describe the clinical course of mixed infections with L. amazonensis and L. infantum in a hamster model. We show that mixed infections are associated with more severe clinical disease than infection with L...
May 10, 2017: Parasitology
https://www.readbyqxmd.com/read/28456430/comparison-of-four-pcr-methods-for-efficient-detection-of-trypanosoma-cruzi-in-routine-diagnostics
#5
Peter Seiringer, Michael Pritsch, María Flores-Chavez, Edoardo Marchisio, Kerstin Helfrich, Carolin Mengele, Stefan Hohnerlein, Gisela Bretzel, Thomas Löscher, Michael Hoelscher, Nicole Berens-Riha
Due to increased migration, Chagas disease has become an international health problem. Reliable diagnosis of chronically infected people is crucial for prevention of non-vectorial transmission as well as treatment. This study compared four distinct PCR methods for detection of Trypanosoma cruzi DNA for the use in well-equipped routine diagnostic laboratories. DNA was extracted of T. cruzi-positive and negative patients' blood samples and cultured T. cruzi, T. rangeli as well as Leishmania spp. One conventional and two real-time PCR methods targeting a repetitive Sat-DNA sequence as well as one conventional PCR method targeting the variable region of the kDNA minicircle were compared for sensitivity, intra- and interassay precision, limit of detection, specificity and cross-reactivity...
April 7, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28446739/suspected-cutaneous-leishmaniasis-in-a-sample-of-westerns-sicily-residents-what-correlation-with-occupation
#6
Maria Gabriella Verso, Fabrizio Vitale, Germano Castelli, Federica Bruno, Antonella Migliazzo, Maria Rita Bongiorno, Fiorella Santi, Giuseppe Pistone, Emanuele Amodio, Diego Picciotto
BACKGROUND: Leishmaniasis is a widespread infectious disease, but there is not much information about its prevalence in high risk occupational categories. OBJECTIVES: The aim of this study is to assess the prevalence of Leishmania immunological positivity in human skin tissues collected from subjects living in Western Sicily, with suspected cutaneous Leishmania infection, in order to explore the risk possibly related to occupation. METHODS: 318 consecutive subjects (M/F ratio=1...
April 21, 2017: La Medicina del Lavoro
https://www.readbyqxmd.com/read/28438522/detection-of-leishmania-infantum-dna-in-conjunctival-swabs-of-cats-by-quantitative-real-time-pcr
#7
Julia Cristina Benassi, Graziella U Benvenga, Helena Lage Ferreira, Vanessa F Pereira, Lara B Keid, Rodrigo Soares, Tricia Maria Ferreira de Sousa Oliveira
Although some studies have investigated the potential role of cats as a reservoir for Leishmania, their role in the epidemiology of visceral leishmaniasis (VL) is still poorly understood. Molecular diagnostic techniques are an important tool in VL diagnosis, and PCR shows high sensitivity and specificity for Leishmania spp. detection. Quantitative real-time PCR (qPCR) is a method that permits quantitative analysis of a large number of samples, resulting in more sensitive, accurate, and reproducible measurements of specific DNA present in the sample...
April 21, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28433944/evaluation-of-vaccinal-effectiveness-of-preparations-containing-membrane-antigens-of-leishmania-l-amazonensis-in-experimental-cutaneous-leishmaniasis-model
#8
João G Ribeiro, Amália S Ferreira, Sharon R A Macedo, Norton R D L P Rossi, Mayara C P da Silva, Rosane N M Guerra, Neuza B de Barros, Roberto Nicolete
American tegumentary leishmaniasis (ATL) is considered a neglected disease, for which an effective vaccine or an efficient diagnosis is not yet available and whose chemotherapeutic arsenal is threatened by the emergence of resistance by etiological agents such as Leishmania amazonensis. ATL is endemic in poor countries and has a high incidence in Brazil. Vaccines developed from native parasite fractions have led to the identification of defined antigenic subunits and the development of vaccine adjuvant technology...
April 20, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28427957/pcr-based-identification-of-trypanosoma-lewisi-and-trypanosoma-musculi-using-maxicircle-kinetoplast-dna
#9
Xiao-Kun Hong, Xuan Zhang, Octavio Alejandro Fusco, You-Gen Lan, Zhao-Rong Lun, De-Hua Lai
Trypanosoma lewisi, transmitted by rat fleas, is a widespread pathogen specific to rats with records of human infection cases. Its closely related species with global distribution, Trypanosoma musculi, is transmitted between mice by ingestion of infected fleas. These trypanosomes are of similar morphology, making it difficult to distinguish them by microscopy. In this study, we have developed a rapid, sensitive and reliable PCR method for the diagnosis of T. lewisi and T. musculi. The T. lewisi-specific amplicons were not produced by other Trypanosoma, such as T...
April 17, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28399053/short-course-regimens-of-liposomal-amphotericin-b-for-the-treatment-of-mediterranean-visceral-leishmaniasis-in-children-an-11-year-retrospective-study-at-a-tertiary-care-center
#10
Panagiotis Krepis, Ioanna Argyri, Adamantia Krepi, Areti Syrmou, Nikos Spyridis, Maria Tsolia
BACKGROUND: Visceral leishmaniasis (VL) remains an important public health problem in endemic regions. Current anti-leishmanial agents share several limitations including potentially serious side effects and the risk of clinical failure. OBJECTIVES: Aim of the present study was to examine the effectiveness and safety of short-course liposomal amphotericin B (L-AmB) regimens in the treatment of childhood VL in our area. METHODS: The cases of 43 VL patients (20 males, 23 females, mean age 4...
April 10, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28385540/performance-of-leishmania-braziliensis-enolase-protein-for-the-serodiagnosis-of-canine-and-human-visceral-leishmaniosis
#11
Mariana Costa Duarte, Daniela Pagliara Lage, Vívian Tamietti Martins, Lourena Emanuele Costa, Beatriz Cristina Silveira Salles, Ana Maria Ravena Severino Carvalho, Thaís Teodoro de Oliveira Santos, Daniel Silva Dias, Patrícia Aparecida Fernandes Ribeiro, Miguel Angel Chávez-Fumagalli, Ricardo Andrez Machado-de-Ávila, Bruno Mendes Roatt, Daniel Menezes-Souza, Danielle Ferreira de Magalhães-Soares, Eduardo Antonio Ferraz Coelho
In the present study, Leishmania braziliensis enolase was cloned and the recombinant protein (rEnolase) was evaluated for the serodiagnosis of canine and human visceral leishmaniosis (VL). For the canine VL diagnosis, this study examined serum samples of Leishmania infantum-infected dogs, from non-infected animals living in endemic or non-endemic areas of leishmaniosis, as well as those from Leish-Tec(®)-vaccinated dogs and Trypanosoma cruzi or Ehrlichia canis experimentally infected animals. For the human VL diagnosis, this study analyzed serum samples from VL patients, from non-infected subjects living in endemic or non-endemic areas of leishmaniosis, as well as those from T...
March 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28382481/anion-exchange-through-band-3-protein-in-canine-leishmaniasis-at-different-stages-of-disease
#12
Rossana Morabito, Alessia Remigante, Mauro Cavallaro, Alessandro Taormina, Giuseppina La Spada, Angela Marino
Band 3 protein efficiency in mediating Cl(-)/HCO3(-) exchange through erythrocytes membrane is reduced by oxidative stress. The aim of the present study was to verify whether and how anion transport through band 3 protein may be useful in monitoring canine leishmaniasis (Leishmania infantum) development, a disease associated to membrane protein degradation and oxidative stress. To accomplish this aim, serological analysis to determine IFAT (immunofluorescence antibody test) titers against leishmaniasis has been performed and 1:160 and 1:540 titers, determined at diagnosis and after 6 months, were considered for experiments...
April 5, 2017: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/28367456/synthetic-peptides-as-potential-antigens-for-cutaneous-leishmaniosis-diagnosis
#13
Juliana Seger Link, Silvana Maria Alban, Carlos Ricardo Soccol, Gilberto Vinicius Melo Pereira, Vanete Thomaz Soccol
This work's goal was to research new candidate antigens for cutaneous leishmaniosis (CL). In order to reach the goal, we used random peptide phage display libraries screened using antibodies from Leishmania braziliensis patients. After selection, three peptides (P1, P2, and P3) were synthesized using Fmoc chemistry. The peptides individually or a mixture of them (MIX) was subsequently emulsified in complete and incomplete Freund's adjuvant and injected subcutaneously in golden hamsters. Sera from the hamsters administered with P1 presented antibodies that recognized proteins between 76 and 150 kDa from L...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28349614/progressive-histoplasmosis-with-hemophagocytic-lymphohistiocytosis-and-epithelioid-cell-granulomatosis-a-case-report-and-review-of-the-literature
#14
Arik Bernard Schulze, Britta Heptner, Torsten Kessler, Birgit Baumgarten, Viorelia Stoica, Michael Mohr, Rainer Wiewrodt, Viktoria Susanne Warneke, Wolfgang Hartmann, Jörg Wüllenweber, Christoph Schülke, Michael Schäfers, Dunja Wilmes, Karsten Becker, Lars Henning Schmidt, Andreas H Groll, Wolfgang E Berdel
Histoplasmosis in central Europe is a rare fungal disease with diverse clinical presentations. Apart from acute pulmonary histoplasmosis and involvement of the central nervous system, the most serious clinical presentation is progressive disseminated histoplasmosis which is generally associated with severe immunodeficiency and, in particular, advanced human immunodeficiency virus infection. Here, we report on an immunocompetent female residing in a non-endemic area, presenting with progressive disseminated histoplasmosis after a remote travel history to Thailand and Costa Rica...
March 27, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/28348785/retrospective-pcr-based-species-identification-of-leishmania-in-two-patients-with-visceral-leishmaniasis-in-serbia
#15
Zorica Dakić, Henrik Vedel Nielsen, Milorad Pavlović, Jasmina Poluga, Goran Stevanović, Lidija Lavadinović, Branko Milošević, Mijomir Pelemiš, Aleksandar Urošević, Snežana Jovanović, Christen Rune Stensvold
INTRODUCTION: Retrospective molecular identification of Leishmania parasites in two patients with visceral leishmaniasis (VL) previously treated in Serbia was carried out. DNA was isolated from unstained bone marrow smears (BMSs) kept for 11 and 8 years. Genus-specific real-time PCR was combined with conventional PCR and sequencing for detection and species identification. CASE PRESENTATION: In 2003, a 40-year-old Serbian male was admitted to the Clinical Centre of Serbia (CCS) with fever, sweating, fatigue and splenomegaly, which developed over a period of 7 weeks...
October 2016: JMM Case Reports
https://www.readbyqxmd.com/read/28335752/development-of-a-rapid-loop-mediated-isothermal-amplification-assay-for-diagnosis-and-assessment-of-cure-of-leishmania-infection
#16
Sandeep Verma, Ruchi Singh, Vanila Sharma, Ram Avtar Bumb, Narendra Singh Negi, V Ramesh, Poonam Salotra
BACKGROUND: Leishmaniasis is a spectrum of diseases with great relevance to public health. Conventional diagnostic methods are time consuming, needing trained personnel. A robust, rapid and cost effective diagnostic test is warranted for on-time diagnosis and field application. METHODS: We have developed a loop mediated isothermal amplification (LAMP) assay with primers (n = 6) based on Leishmania donovani kDNA for detection of Leishmania infection, using a closed tube to prevent cross-contamination...
March 23, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28329481/cutaneous-leishmaniasis-mimicking-squamous-cell-carcinoma
#17
Tara Oetken, Bryan Hiscox, Ida Orengo, Theodore Rosen
A 41-year-old man from Cuero, Texas with a nonhealinglesion on his left cheek was referred to ourclinic for removal of a squamous cell carcinoma. Thepatient first noticed a "pimple" on his left cheek 3-4months prior to presentation. When the lesion beganto grow he presented to his primary care physician anda biopsy was taken, showing "atypical squamous cellproliferation." Mohs surgery was performed and thenodule was removed with no evidence of malignancyseen on histopathology. Upon review of the surgicalbiopsies by consulting pathologists, the diagnosis ofleishmaniasis was established and later confirmed bythe Center for Disease Control and Prevention (CDC)as Leishmania mexicana...
January 15, 2017: Dermatology Online Journal
https://www.readbyqxmd.com/read/28327803/serodiagnosis-of-visceral-and-cutaneous-leishmaniasis-in-human-and-canine-populations-living-in-indigenous-reserves-in-the-brazilian-amazon-region
#18
Julia Teresa Ribeiro de Lima, Solange Maria Gennari, Herbert Sousa Soares, Antonio Humberto Hamad Minervino, Antonio Francisco Malheiros, Fernando Silveira Marques, Márcia Dalastra Laurenti, Rosangela Zacarias Machado, Arlei Marcili, Marcelo Bahia Labruna, Rodrigo Martins Soares
INTRODUCTION: Leishmaniasis is endemic to the Northern, Northeastern, Central-Western, and Southeastern regions of Brazil. We aimed to assess the epidemiological situation of leishmaniasis in humans and dogs in indigenous villages located in the States of Mato Grosso and Tocantins using a serological survey conducted in May 2011. METHODS: Serum samples were collected from 470 humans and 327 dogs living in villages of the Urubu Branco and Tapirapé Karajá indigenous reserves...
January 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28303124/identification-and-characterization-of-mirnas-in-response-to-leishmania-donovani-infection-delineation-of-their-roles-in-macrophage-dysfunction
#19
Neeraj Tiwari, Vinod Kumar, Mallikarjuna Rao Gedda, Ashish K Singh, Vijay K Singh, Sreenivas Gannavaram, Surya P Singh, Rakesh K Singh
The outcome of Leishmania infection depends on parasite abilities to evade host immune response and its survival in hostile environment of host macrophages. Despite a wealth of gained crucial information, parasite strategies by which it dampens host macrophage functions remain poorly understood. Micro RNAs (miRNAs) are evolutionarily conserved class of endogenous 22-nucleotide small non-coding RNA gene products, described to participate in the regulation of almost every cellular process investigated so far...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28301553/multiplex-pcr-as-a-tool-for-the-diagnosis-of-leishmania-spp-kdna-and-the-gapdh-housekeeping-gene-of-mammal-hosts
#20
Renata de Cássia-Pires, Myllena de Fátima Alheiros Dias de Melo, Raquel da Hora Barbosa, André Luiz Rodrigues Roque
BACKGROUND: The PCR assays usually employed for Leishmania diagnosis does not simultaneously detect a constitutive gene that would certify the viability of the DNA sample. We present a multiplex PCR approach for the simultaneous diagnosis of the Leishmania sp. kDNA fragment and a catalytic domain segment of a conserved region of the mammalian gapdh gene. METHODOLOGY: The proposed multiplex protocol was designed through in silico PCR. The annealing temperature, concentration of primer pairs, number of cycles, distinct polymerase enzymes and premix kit were defined to achieve an optimal reaction...
2017: PloS One
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