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https://www.readbyqxmd.com/read/28214367/population-genetic-structure-and-adaptation-of-malaria-parasites-on-the-edge-of-endemic-distribution
#1
Craig W Duffy, Hampate Ba, Samuel Assefa, Ambroise D Ahouidi, Yacine B Deh, Abderahmane Tandia, Freja C M Kirsebom, Dominic P Kwiatkowski, David J Conway
To determine whether the major human malaria parasite Plasmodium falciparum exhibits fragmented population structure or local adaptation at the northern limit of its African distribution where the dry Sahel zone meets the Sahara, samples were collected from diverse locations within Mauritania over a range of ~ 1000 kilometres. Microsatellite genotypes were obtained for 203 clinical infection samples from eight locations, and Illumina paired-end sequences were obtained to yield high coverage genome-wide single nucleotide polymorphism (SNP) data for 65 clinical infection samples from four locations...
February 18, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28214126/pulmonary-nodules-in-african-migrants-caused-by-chronic-schistosomiasis
#2
REVIEW
Federico Gobbi, Dora Buonfrate, Andrea Angheben, Anna Beltrame, Matteo Bassetti, Luca Bertolaccini, Giuseppe Bogina, Simone Caia, Silvia Duranti, Maria Gobbo, Valentina Marchese, Stefania Marocco, Maria Merelli, Geraldo Monteiro, Alberto Terzi, Zeno Bisoffi
Schistosomiasis is a neglected tropical disease that can cause mainly hepatic and genitourinary damage, depending on the species. Involvement of the lungs has been commonly described in acute infection (Katayama syndrome) and chronic infection (pulmonary hypertension). Although rarely reported in the scientific literature, cases of lung nodules due to chronic schistosome infection are also possible and are probably more frequent than commonly thought. Here we report seven cases of African migrants who were diagnosed with chronic schistosomiasis and pulmonary nodules due to deposition of schistosome eggs, and we compare our findings to the case reports found in the scientific literature...
February 14, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28213920/potato-aphid-macrosiphum-euphorbiae-performance-is-determined-by-aphid-genotype-and-not-mycorrhizal-fungi-or-water-availability
#3
Alison Jane Karley, Matthew Emslie-Smith, Alison Elizabeth Bennett
Intra- and inter-specific variation in plant and insect traits can alter the strength and direction of insect-plant interactions, with outcomes modified by soil biotic and abiotic conditions. We used the potato aphid (Macrosiphum euphorbiae Thomas) feeding on cultivated S. tuberosum and wild S. berthaulti to study the impact of water availability and plant mutualistic arbuscular mycorrhizal (AM) fungi on aphid performance and susceptibility to a parasitoid wasp (Aphidius ervi Haliday). Plants were grown under glass with live or sterile AM fungal spores and supplied with sufficient or reduced water supply...
February 18, 2017: Insect Science
https://www.readbyqxmd.com/read/28213655/molecular-characterization-of-the-unique-mesostephanus-appendiculatus-trematoda-cyathocotylidae-by-small-ribosomal-rna-from-egypt
#4
Nasr M El-Bahy, Eman K Bazh, Shimaa S Sorour, Nagwa M Elhawary
M esostephanus appendiculatus (Family: Cyathocotylidae) is one of the unique trematodes that complete their cycles in human and animal intestines in many countries of the world. The main source of its transmission is eating raw or undercooked infected fish muscle. Earliest analyses of genes to different parasites supported the analysis of helminthes either biological or morphological. This paper detected M. appendiculatus sequence with GenBank accession number gb (KY026782). Comparison of M. appendiculatus with other helminthes using BioEdit 7 and MEGA7 program shows some similarity in different points along its sequence...
February 18, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28213652/evaluating-stress-physiology-and-parasite-infection-parameters-in-the-translocation-of-critically-endangered-woylies-bettongia-penicillata
#5
Stephanie Hing, Amy S Northover, Edward J Narayan, Adrian F Wayne, Krista L Jones, Sarah Keatley, R C Andrew Thompson, Stephanie S Godfrey
Translocation can be stressful for wildlife. Stress may be important in fauna translocation because it has been suggested that it can exacerbate the impact of infectious disease on translocated wildlife. However, few studies explore this hypothesis by measuring stress physiology and infection indices in parallel during wildlife translocations. We analysed faecal cortisol metabolite (FCM) concentration and endoparasite parameters (nematodes, coccidians and haemoparasites) in a critically endangered marsupial, the woylie (Bettongia penicillata), 1-3 months prior to translocation, at translocation, and 6 months later...
February 17, 2017: EcoHealth
https://www.readbyqxmd.com/read/28213436/host-cell-tropism-and-adaptation-of-blood-stage-malaria-parasites-challenges-for-malaria-elimination
#6
Caeul Lim, Selasi Dankwa, Aditya S Paul, Manoj T Duraisingh
Plasmodium falciparum and Plasmodium vivax account for most of the mortality and morbidity associated with malaria in humans. Research and control efforts have focused on infections caused by P. falciparum and P. vivax, but have neglected other malaria parasite species that infect humans. Additionally, many related malaria parasite species infect nonhuman primates (NHPs), and have the potential for transmission to humans. For malaria elimination, the varied and specific challenges of all of these Plasmodium species will need to be considered...
February 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28213434/malaria-during-pregnancy
#7
Michal Fried, Patrick E Duffy
One hundred and twenty-five million women in malaria-endemic areas become pregnant each year (see Dellicour et al. PLoS Med7: e1000221 [2010]) and require protection from infection to avoid disease and death for themselves and their offspring. Chloroquine prophylaxis was once a safe approach to prevention but has been abandoned because of drug-resistant parasites, and intermittent presumptive treatment with sulfadoxine-pyrimethamine, which is currently used to protect pregnant women throughout Africa, is rapidly losing its benefits for the same reason...
February 17, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28213174/evidence-of-the-presence-of-a-calmodulin-sensitive-plasma-membrane-ca-2-atpase-in-trypanosoma-equiperdum
#8
María Carolina Pérez-Gordones, José Rubén Ramírez-Iglesias, Vincenza Cervino, Graciela L Uzcanga, Gustavo Benaim, Marta Mendoza
Trypanosoma equiperdum belongs to the subgenus Trypanozoon, which has a significant socio-economic impact by limiting animal protein productivity worldwide. Proteins involved in the intracellular Ca(2+) regulation are prospective chemotherapeutic targets since several drugs used in experimental treatment against trypanosomatids exert their action through the disruption of the parasite intracellular Ca(2+) homeostasis. Therefore, the plasma membrane Ca(2+)-ATPase (PMCA) is considered as a potential drug target...
February 14, 2017: Molecular and Biochemical Parasitology
https://www.readbyqxmd.com/read/28212848/major-vectors-and-vector-borne-diseases-in-small-ruminants-in-ethiopia-a-systematic-review
#9
REVIEW
Kassahun Asmare, Takele Abayneh, Berhanu Sibhat, Dessie Shiferaw, Barbara Szonyi, Randi I Krontveit, Eystein Skjerve, Barbara Wieland
Vector-borne diseases are among major health constraints of small ruminant in Ethiopia. While various studies on single vector-borne diseases or presence of vectors have been conducted, no summarized evidence is available on the occurrence of these diseases and the related vectors. This systematic literature review provides a comprehensive summary on major vectors and vector-borne diseases in small ruminants in Ethiopia. Search for published and unpublished literature was conducted between 8th of January and 25th of June 2015...
February 14, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28212811/polymorphisms-of-blood-forms-and-in-vitro-metacyclogenesis-of-trypanosoma-cruzi-i-ii-and-iv
#10
Camila Piva Abegg, Ana Paula de Abreu, Juliane Lopes da Silva, Silvana Marques de Araújo, Mônica Lúcia Gomes, Érika Cristina Ferreira, Max Jean de Ornelas Toledo
Trypanosoma cruzi is the etiologic agent of American trypanosomiasis has broad biological and genetic diversity. Remaining to be studied are polymorphisms of the blood forms and metacyclogenesis of different T. cruzi discrete typing units (DTUs). Our goal was to evaluate the relationship between T. cruzi DTUs, the morphology of blood trypomastigotes, and in vitro metacyclogenesis. T. cruzi strains that pertained to DTUs TcI, TcII, and TcIV from different Brazilian states were used. Parameters that were related to the morphology of eight strains were assessed in thin blood smears that were obtained from mice that were inoculated with blood or culture forms, depending on strain...
February 14, 2017: Experimental Parasitology
https://www.readbyqxmd.com/read/28212790/the-echinococcoses-diagnosis-clinical-management-and-burden-of-disease
#11
P Kern, A Menezes da Silva, O Akhan, B Müllhaupt, K A Vizcaychipi, C Budke, D A Vuitton
The echinococcoses are chronic, parasitic diseases that are acquired after ingestion of infective taeniid tapeworm eggs from certain species of the genus Echinococcus. Cystic echinococcosis (CE) occurs worldwide, whereas, alveolar echinococcosis (AE) is restricted to the northern hemisphere, and neotropical echinococcosis (NE) has only been identified in Central and South America. Clinical manifestations and disease courses vary profoundly for the different species of Echinococcus. CE presents as small to large cysts, and has commonly been referred to as 'hydatid disease', or 'hydatidosis'...
2017: Advances in Parasitology
https://www.readbyqxmd.com/read/28212789/laboratory-diagnosis-of-echinococcus-spp-in-human-patients-and-infected-animals
#12
M Siles-Lucas, A Casulli, F J Conraths, N Müller
Among the species composing the genus Echinococcus, four species are of human clinical interest. The most prevalent species are Echinococcus granulosus and Echinococcus multilocularis, followed by Echinococcus vogeli and Echinococcus oligarthrus. The first two species cause cystic echinococcosis (CE) and alveolar echinococcosis (AE) respectively. Both diseases have a complex clinical management, in which laboratory diagnosis could be an adjunctive to the imaging techniques. To date, several approaches have been described for the laboratory diagnosis and followup of CE and AE, including antibody, antigen and cytokine detection...
2017: Advances in Parasitology
https://www.readbyqxmd.com/read/28212788/immunology-of-alveolar-and%C3%A2-cystic-echinococcosis-ae-and-ce
#13
B Gottstein, P Soboslay, E Ortona, J Wang, A Siracusano, D Α Vuitton
Cystic and alveolar echinococcosis are severe chronic helminthic diseases caused by the cystic growth or the intrahepatic tumour-like growth of the metacestode of Echinococcus granulosus or Echinococcus multilocularis, respectively. Both parasites have evolved sophisticated strategies to escape host immune responses, mainly by manipulating and directing this immune response towards anergy and/or tolerance. Recent research studies have revealed a number of respective immunoregulatory mechanisms related to macrophages and dendritic cell as well as T cell activities (regulatory T cells, Tregs)...
2017: Advances in Parasitology
https://www.readbyqxmd.com/read/28212676/genetic-diversity-and-selection-of-three-nuclear-genes-in-schistosoma-japonicum-populations
#14
Yaqi Li, Mingbo Yin, Qunfeng Wu, Donald P McManus, David Blair, Hongyan Li, Bin Xu, Xiaojin Mo, Zheng Feng, Wei Hu
BACKGROUND: The blood fluke, Schistosoma japonicum still causes severe disease in China, the Philippines and Indonesia. Although there have been some studies the molecular epidemiology of this persistent and harmful parasite, few have explored the possibility and implications of selection in S. japonicum populations. METHODS: We analyzed diversity and looked for evidence of selection at three nuclear genes (SjIpp2, SjFabp and SjT22.6) in 13 S. japonicum populations...
February 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28212669/understanding-trophic-interactions-in-host-parasite-associations-using-stable-isotopes-of-carbon-and-nitrogen
#15
Milen Nachev, Maik A Jochmann, Friederike Walter, J Benjamin Wolbert, S Marcel Schulte, Torsten C Schmidt, Bernd Sures
BACKGROUND: Stable isotope analysis of carbon and nitrogen can deliver insights into trophic interactions between organisms. While many studies on free-living organisms are available, the number of those focusing on trophic interactions between hosts and their associated parasites still remains scarce. In some cases information about taxa (e.g. acanthocephalans) is completely missing. Additionally, available data revealed different and occasionally contrasting patterns, depending on the parasite's taxonomic position and its degree of development, which is most probably determined by its feeding strategy (absorption of nutrients through the tegument versus active feeding) and its localization in the host...
February 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28212667/assessing-the-interruption-of-the-transmission-of-human-helminths-with-mass-drug-administration-alone-optimizing-the-design-of-cluster-randomized-trials
#16
Roy Anderson, Sam Farrell, Hugo Turner, Judd Walson, Christl A Donnelly, James Truscott
BACKGROUND: A method is outlined for the use of an individual-based stochastic model of parasite transmission dynamics to assess different designs for a cluster randomized trial in which mass drug administration (MDA) is employed in attempts to eliminate the transmission of soil-transmitted helminths (STH) in defined geographic locations. The hypothesis to be tested is: Can MDA alone interrupt the transmission of STH species in defined settings? Clustering is at a village level and the choice of clusters of villages is stratified by transmission intensity (low, medium and high) and parasite species mix (either Ascaris, Trichuris or hookworm dominant)...
February 17, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28212654/diversity-and-distribution-of-avian-malaria-and-related-haemosporidian-parasites-in-captive-birds-from-a-brazilian%C3%A2-megalopolis
#17
Carolina Romeiro Fernandes Chagas, Gediminas Valkiūnas, Lilian de Oliveira Guimarães, Eliana Ferreira Monteiro, Fernanda Junqueira Vaz Guida, Roseli França Simões, Priscila Thihara Rodrigues, Expedito José de Albuquerque Luna, Karin Kirchgatter
BACKGROUND: The role of zoos in conservation programmes has increased significantly in last decades, and the health of captive animals is essential to guarantee success of such programmes. However, zoo birds suffer from parasitic infections, which often are caused by malaria parasites and related haemosporidians. Studies determining the occurrence and diversity of these parasites, aiming better understanding infection influence on fitness of captive birds, are limited. METHODS: In 2011-2015, the prevalence and diversity of Plasmodium spp...
February 17, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28212641/local-constraints-to-access-appropriate-malaria-treatment-in-the-context-of-parasite-resistance-in-cambodia-a-qualitative-study
#18
Jesse Verschuere, Tom Decroo, Dara Lim, Jean-Marie Kindermans, Chea Nguon, Rekol Huy, Yasmine Alkourdi, Koen Peeters Grietens, Charlotte Gryseels
BACKGROUND: Despite emerging drug resistance in Cambodia, artemisinin-based combination therapy (ACT) is still the most efficacious therapy. ACT is available free of charge in the Cambodian public sector and at a subsidized rate in the private sector. However, un- and mistreated cases in combination with population movements may lead to the further spread of resistant parasites, stressing the importance of understanding how the perceived aetiology of malaria and associated health-seeking behaviour may delay access to appropriate treatment...
February 17, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28212414/decline-in-infection-related-morbidities-following-drug-mediated-reductions-in-the-intensity-of-schistosoma-infection-a-systematic-review-and-meta-analysis
#19
Gisele Andrade, David J Bertsch, Andrea Gazzinelli, Charles H King
BACKGROUND: Since 1984, WHO has endorsed drug treatment to reduce Schistosoma infection and its consequent morbidity. Cross-sectional studies suggest pre-treatment correlation between infection intensity and risk for Schistosoma-related pathology. However, evidence also suggests that post-treatment reduction in intensity may not reverse morbidity because some morbidities occur at all levels of infection, and some reflect permanent tissue damage. The aim of this project was to systematically review evidence on drug-based control of schistosomiasis and to develop a quantitative estimate of the impact of post-treatment reductions in infection intensity on prevalence of infection-associated morbidity...
February 17, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28212398/modelling-the-risk-of-taenia-solium-exposure-from-pork-produced-in-western-kenya
#20
Lian F Thomas, William A de Glanville, Elizabeth A J Cook, Barend M De C Bronsvoort, Ian Handel, Claire N Wamae, Samuel Kariuki, Eric M Fèvre
The tapeworm Taenia solium is the parasite responsible for neurocysticercosis, a neglected tropical disease of public health importance, thought to cause approximately 1/3 of epilepsy cases across endemic regions. The consumption of undercooked infected pork perpetuates the parasite's life-cycle through the establishment of adult tapeworm infections in the community. Reducing the risk associated with pork consumption in the developing world is therefore a public health priority. The aim of this study was to estimate the risk of any one pork meal in western Kenya containing a potentially infective T...
February 17, 2017: PLoS Neglected Tropical Diseases
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