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https://www.readbyqxmd.com/read/29235368/antischistosomal-agents-state-of-art-and-perspectives
#1
Eloi M Lago, Rogério P Xavier, Thaina R Teixeira, Lívia M Silva, Ademar A da Silva Filho, Josué de Moraes
Praziquantel has remained the drug of choice for schistosomiasis chemotherapy for almost 40 years. The pressing need to develop a new antischistosomal drug may necessitate exploring and filtering chemotherapeutic history to search for the most promising ones. In this context, this review attempts to summarize all progress made in schistosomiasis chemotherapy from the early 20th century (mid-1910s) to 2016. We gathered almost 100 compounds providing information on therapeutic action, specifically covering at least first in vivo studies in animal model and in vitro...
December 13, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29230303/case-series-of-paragonimiasis-from-nepal
#2
Ranjit Sah, Shusila Khadka
Paragonimiasis is an important food-borne parasitic zoonosis caused by trematodes of genus Paragonimus. We report case series of paragonimiasis with common symptoms of cough with blood tinged sputum, shortness of breath, chest pain with occasional fever, eosinophilia and radiological findings mimicking pulmonary tuberculosis and had taken anti-tubercular drug despite all investigation negative for tuberculosis without improvement. They all had common history of consumption of raw/undercooked crab. There is a local belief in remote villages of Nepal that eating raw crab helps in healing bone fracture and cure jaundice...
November 2017: Oxford Medical Case Reports
https://www.readbyqxmd.com/read/29220347/assessing-the-benefits-of-five-years-of-different-approaches-to-treatment-of-urogenital-schistosomiasis-a-score-project-in-northern-mozambique
#3
Anna E Phillips, Pedro H Gazzinelli-Guimaraes, Herminio O Aurelio, Josefo Ferro, Rassul Nala, Michelle Clements, Charles H King, Alan Fenwick, Fiona M Fleming, Neerav Dhanani
BACKGROUND: In Mozambique, schistosomiasis is highly endemic across the whole country. The Schistosomiasis Consortium for Operational Research and Evaluation (SCORE) coordinates a five-year study that has been implemented in various African countries, including Mozambique. The overall goal of SCORE was to better understand how to best apply preventive chemotherapy with praziquantel (PZQ) for schistosomiasis control by evaluating the impact of alternative treatment approaches. METHODS: This was a cluster-randomised trial that compared the impact of different treatment strategies in study areas with prevalence among school children of ≥21% S...
December 8, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29218962/schistosomiasis-and-soil-transmitted-helminthiases-number-of-people-treated-in-2016
#4
(no author information available yet)
No abstract text is available yet for this article.
December 8, 2017: Relevé épidémiologique Hebdomadaire
https://www.readbyqxmd.com/read/29214976/stray-cats-are-more-frequently-infected-with-zoonotic-protists-than-pet-cats
#5
Martin Kvac, Lada Hofmannova, Ynes Ortega, Nikola Holubova, Michaela Horcickova, Marta Kicia, Lenka Hlaskova, Dana Kvetonova, Bohumil Sak, John McEvoy
Faecal samples were collected from cats kept as pets (n = 120) and stray cats (n = 135) in Central Europe (Czech Republic, Poland and Slovakia) and screened for the presence of Cryptosporidium spp., Giardia intestinalis (Kunstler, 1882), Encephalitozoon spp. and Enterocytozoon bieneusi Desportes, Le Charpentier, Galian, Bernard, Cochand-Priollet, Lavergne, Ravisse et Modigliani, 1985 by PCR analysis of the small-subunit of rRNA (Cryptosporidium spp. and G. intestinalis) and ITS (microsporidia) genes. Sequence analysis of targeted genes revealed the presence of C...
December 6, 2017: Folia Parasitologica
https://www.readbyqxmd.com/read/29208933/the-anthelmintic-praziquantel-is-a-human-serotoninergic-g-protein-coupled-receptor-ligand
#6
John D Chan, Pauline M Cupit, Gihan S Gunaratne, John D McCorvy, Yang Yang, Kristen Stoltz, Thomas R Webb, Peter I Dosa, Bryan L Roth, Ruben Abagyan, Charles Cunningham, Jonathan S Marchant
Schistosomiasis is a debilitating tropical disease caused by infection with parasitic blood flukes. Approximately 260 million people are infected worldwide, underscoring the clinical and socioeconomic impact of this chronic infection. Schistosomiasis is treated with the drug praziquantel (PZQ), which has proved the therapeutic mainstay for over three decades of clinical use. However, the molecular target(s) of PZQ remain undefined. Here we identify a molecular target for the antischistosomal eutomer - (R)-PZQ - which functions as a partial agonist of the human serotoninergic 5HT2B receptor...
December 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/29208358/effect-of-epicatechin-a-flavonoid-on-the-no-and-nos-activity-of-raillietina-echinobothrida
#7
Mitali Chetia, Robin Das
(-)-Epicatechin, a natural flavonoid reportedly has huge pharmacological properties. In this study the cestocide effect of (-)-epicatechin is demonstrated in Raillietina echinobothrida. Although the antiparasitic activity of (-)-epicatechin has been demonstrated against protozoa, helminthes and ectoparasites, in the present study the cestocide activity of (-)-epicatechin is shown to be related to a decrease in nitric oxide synthase (NOS) activity and nitric oxide (NO) production. On exposure to 0.53mg/ml each of epicatechin, reference drug praziquantel and Ѡ Nitro-L- Arginine Methyl Ester (NOS inhibitor), the parasites attained paralysis at 10...
December 2, 2017: Acta Tropica
https://www.readbyqxmd.com/read/29197426/phenotypic-and-genotypic-monitoring-of-schistosoma-mansoni-in-tanzanian-schoolchildren-five-years-into-a-preventative-chemotherapy-national-control-programme
#8
Charlotte M Gower, Florian Gehre, Sara R Marques, Poppy H L Lamberton, Nicholas J Lwambo, Joanne P Webster
BACKGROUND: Schistosoma mansoni is a parasite of profound medical importance. Current control focusses on mass praziquantel (PZQ) treatment of populations in endemic areas, termed Preventative Chemotherapy (PC). Large-scale PC programmes exert prolonged selection pressures on parasites with the potential for, direct and/or indirect, emergence of drug resistance. Molecular methods can help monitor genetic changes of schistosome populations over time and in response to drug treatment, as well as estimate adult worm burdens through parentage analysis...
December 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29190292/tnf-%C3%AE-blockade-suppresses-pericystic-inflammation-following-anthelmintic-treatment-in-porcine-neurocysticercosis
#9
Siddhartha Mahanty, Miguel A Orrego, Carla Cangalaya, M Paz Adrianzen, Gianfranco Arroyo, Juan Calcina, Armando E Gonzalez, Héctor H García, Cristina Guerra-Giraldez, Theodore E Nash
BACKGROUND: Neurocysticercosis (NCC) is an infection of the brain with the larval cyst of the tapeworm, Taenia solium. Cysticidal treatment induces parasite killing resulting in a post inflammatory response and seizures, which generally requires corticosteroid treatment to control inflammation. The nature of this response and how to best control it is unclear. We investigated the anti-inflammatory effects of pretreatment with etanercept (ETN), an anti-tumor necrosis factor agent, or dexamethasone (DEX), a high potency corticosteroid, on the post treatment inflammatory response in naturally infected pigs with neurocysticercosis after a single dose of the cysticidal drug praziquantel (PZQ)...
November 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29188369/immune-modulation-of-th1-th2-and-t-reg-transcriptional-factors-differing-from-cytokine-levels-in-schistosoma-japonicum-infection
#10
Amel Farwa, Chao He, Longfei Xia, Hong Zhou
In spite of long-term integrated control programs for Schistosoma japonicum infection in China, the infection is still persistent due to its zoonotic transmission and disease severity which further complicate its control. Th1, Th2, and T-reg cells are involved in S. japonicum immunity; however, their exact roles in immunopathology of this infection are still questionable. Therefore, the monitoring of these T cell subsets' immune responses during a primary infection of S. japonicum at both transcriptional (mRNA) and protein (cytokines) levels would be essential to point out...
November 29, 2017: Parasitology Research
https://www.readbyqxmd.com/read/29181419/decrease-in-seminal-hiv-1-rna-load-after-praziquantel-treatment-of-urogenital-schistosomiasis-coinfection-in-hiv-positive-men-an-observational-study
#11
Nicholas Midzi, Takafira Mduluza, Boniface Mudenge, Leslie Foldager, Peter D C Leutscher
Background: Urogenital schistosomiasis due to Schistosoma hematobium infection is hypothesized to cause increased HIV-1 RNA shedding in semen in HIV co-infected men as result of chronic egg-induced inflammation in the prostate and the seminal vesicles. The effect of treatment with the antihelminthic agent praziquantel on seminal HIV-1 RNA load was assessed in this study. Methods: HIV-1 RNA load was determined in blood plasma and semen at baseline and at 10-week follow-up...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/29172838/in-vitro-schistosomicidal-activity-of-the-lignan-6-6-dinitrohinokinin-dnhk-loaded-into-poly-lactic-co-glycolic-acid-nanoparticles-against-schistosoma-mansoni
#12
Thaís C Lima, Rodrigo Lucarini, Priscilla P Luz, Emerson H de Faria, Liziane Marçal, Lizandra G Magalhães, Fernanda R Badoco, Viviane R Esperandim, Eduardo F Molina, Rosangela S Laurentz, Regiane G Lima, Wilson R Cunha, Jairo K Bastos, Marcio L Andrade Silva
CONTEXT: (-)-6,6'-Dinitrohinokinin (DNHK) display remarkable antiparasitic activity and was, therefore, incorporated into a nanoparticle formulation. OBJECTIVE: Incorporation of DNHK in poly lactic-co-glycolic acid (PLGA) nanoparticles aiming to improve its biological activities. MATERIALS AND METHODS: Synthesis, characterization and incorporation of DNHK into glycolic acid (PLGA) nanoparticles by nanoprecipitation method. The nanoparticles were characterized by ultraviolet-visible spectroscopy, X-ray diffraction, field emission electron microscopic scanning mansoni (FESEM), and dynamic light scattering (DLS)...
December 2017: Pharmaceutical Biology
https://www.readbyqxmd.com/read/29169803/expression-purification-and-characterization-of-two-leucine-aminopeptidases-of-the-blood-fluke-schistosoma-mansoni
#13
Gabriela Maggioli, Gabriel Rinaldi, Ines Giaudrone, Patricia Berasain, José F Tort, Paul J Brindley, Carlos Carmona
Schistosomiasis is a major neglected tropical disease (NTD) and considered the most important of the human helminthiases in terms of morbidity and mortality. Whereas treatment with praziquantel has been effective since the 1980s, the potential for the emergence of drug resistance has propelled the search for new interventions. Studies have revealed key roles of proteases in parasitic helminths during establishment of infection, tissue invasion, immune evasion, parasite feeding and development throughout the different developmental stages, pinpointing them as possible candidates...
November 20, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/29165707/inflammation-dynamics-after-praziquantel-treatment-of-schistosoma-haematobium-reflected-by-urinary-eosinophil-cationic-protein
#14
Chalotte Willemann Stecher, Hassan K M Fofana, Henry Madsen, Shona Wilson, Adama D Keita, Aly Landouré, Mamadou S Traoré, Birgitte J Vennervald, Claus M Reimert, Moussa Sacko
Background: This cohort study assessed urinary eosinophil cationic protein (ECP) as an indicator for urinary tract morbidity and inflammation indication related to single-dose or dual-dose praziquantel (PZQ) treatment. Methods: Urinary ECP was measured at baseline, 24 h and 9 weeks after treatment (baseline 305, follow-up 204 participants, ages 2-40 years). Results: ECP was significantly associated with the intensity of infection at baseline (p<0...
November 20, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29153938/efficacy-and-safety-of-tribendimidine-versus-praziquantel-against-opisthorchis-viverrini-in-laos-an-open-label-randomised-non-inferiority-phase-2-trial
#15
Somphou Sayasone, Jennifer Keiser, Isabel Meister, Youthanavanh Vonghachack, Syda Xayavong, Kanpaseuth Senggnam, Khampheng Phongluxa, Jan Hattendorf, Peter Odermatt
BACKGROUND: Praziquantel is the only option for treatment of the liver fluke infection Opisthorchis viverrini. Tribendimidine could be an alternative drug. We aimed to assess the efficacy and safety of a single, oral dose of tribendimidine, compared with praziquantel administered in two doses, in participants with O viverrini infection. METHOD: We did an open-label, randomised, non-inferiority, phase 2 trial in children (8-14 years) and adolescents and adults (≥15 years) in Champasack province, southern Laos...
November 16, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29153937/tribendimidine-an-alternative-to-praziquantel-to-treat-human-liver-fluke-infection
#16
Banchob Sripa
No abstract text is available yet for this article.
November 16, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29151362/elimination-of-schistosomiasis-the-tools-required
#17
REVIEW
Robert Bergquist, Xiao-Nong Zhou, David Rollinson, Jutta Reinhard-Rupp, Katharina Klohe
BACKGROUND: Historically, the target in the schistosomiasis control has shifted from infection to morbidity, then back to infection, but now as a public health problem, before moving on to transmission control. Currently, all endemic countries are encouraged to increase control efforts and move towards elimination as required by the World Health Organization (WHO) roadmap for the global control of the neglected tropical diseases (NTDs) and the WHA65.21 resolution issued by the World Health Assembly...
November 20, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/29147726/-radiculomyelopathy-in-schistosomiasis
#18
REVIEW
J Detzler, H Backes, J Guldner
The increasing migration of people from their homeland in far distant regions to Europe in the last few years has strongly influenced the rise of previously rarely seen diseases. They not only originate from the respective homeland but also from the transit countries during the migration process. We report the case of a 27-year-old male migrant from Eritrea, who after months of flight as a refugee travelling through various African countries, presented at our hospital with a progressive, painful radiculopathy...
November 16, 2017: Der Nervenarzt
https://www.readbyqxmd.com/read/29143689/examination-of-the-susceptibility-gap-in-the-treatment-of-canine-heartworm-infection
#19
REVIEW
Dwight D Bowman, Jason Drake
BACKGROUND: The "susceptibility gap" in a dog diagnosed with adult heartworms has been defined as the period of time in which some Dirofilaria immitis stages are not susceptible to treatment with either macrocyclic lactones or melarsomine dihydrochloride. This was previously defined within the American Heartworm Society guidelines as a period of about 3 months "as per product labels." It can be postulated, however, that a susceptibility gap does not exist with the combination of continued macrocyclic lactone therapy coupled with a three-dose melarsomine dihydrochloride protocol where the first intramuscular treatment is near the time of first diagnosis...
November 9, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29141763/pilot-study-of-the-addition-of-mass-treatment-for-malaria-to-existing-school-based-programs-to-treat-neglected-tropical-diseases
#20
Lauren M Cohee, Moses Chilombe, Andrew Ngwira, Samuel K Jemu, Don P Mathanga, Miriam K Laufer
Malaria and neglected tropical diseases (NTDs), including schistosomiasis and soil transmitted helminths, threaten the health of school aged in sub-Saharan Africa. Established school-based mass drug administration (MDA) programs are used to control NTDs. Recent clinical trials have shown benefit of mass treatment of malaria in schools. The potential of adding malaria treatment to existing NTD programs has not been thoroughly evaluated. We offered malaria treatment with artemether-lumefantrine during routine NTD MDA and developed peer education programs in two primary schools in southern Malawi...
November 6, 2017: American Journal of Tropical Medicine and Hygiene
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