Public Health Service Centers for Disease Control and Prevention (CDC) Memorandum Date: January 7, 2011 From: WHO Collaborat
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The Functional Parasitic Worm Secretome: Mapping the Place of Onchocerca Volvulus Excretory Secretory Products
pathogens Review The Functional Parasitic Worm Secretome: Mapping the Place of Onchocerca volvulus Excretory Secretory Products Luc Vanhamme 1,*, Jacob Souopgui 1 , Stephen Ghogomu 2 and Ferdinand Ngale Njume 1,2 1 Department of Molecular Biology, Institute of Biology and Molecular Medicine, IBMM, Université Libre de Bruxelles, Rue des Professeurs Jeener et Brachet 12, 6041 Gosselies, Belgium; [email protected] (J.S.); [email protected] (F.N.N.) 2 Molecular and Cell Biology Laboratory, Biotechnology Unit, University of Buea, Buea P.O Box 63, Cameroon; [email protected] * Correspondence: [email protected] Received: 28 October 2020; Accepted: 18 November 2020; Published: 23 November 2020 Abstract: Nematodes constitute a very successful phylum, especially in terms of parasitism. Inside their mammalian hosts, parasitic nematodes mainly dwell in the digestive tract (geohelminths) or in the vascular system (filariae). One of their main characteristics is their long sojourn inside the body where they are accessible to the immune system. Several strategies are used by parasites in order to counteract the immune attacks. One of them is the expression of molecules interfering with the function of the immune system. Excretory-secretory products (ESPs) pertain to this category. This is, however, not their only biological function, as they seem also involved in other mechanisms such as pathogenicity or parasitic cycle (molting, for example). Wewill mainly focus on filariae ESPs with an emphasis on data available regarding Onchocerca volvulus, but we will also refer to a few relevant/illustrative examples related to other worm categories when necessary (geohelminth nematodes, trematodes or cestodes). -
Co-Infection with Onchocerca Volvulus and Loa Loa Microfilariae in Central Cameroon: Are These Two Species Interacting?
843 Co-infection with Onchocerca volvulus and Loa loa microfilariae in central Cameroon: are these two species interacting? S. D. S. PION1,2*, P. CLARKE3, J. A. N. FILIPE2,J.KAMGNO1,J.GARDON1,4, M.-G. BASA´ N˜ EZ2 and M. BOUSSINESQ1,5 1 Laboratoire mixte IRD (Institut de Recherche pour le De´veloppement) – CPC (Centre Pasteur du Cameroun) d’Epide´miologie et de Sante´ publique, Centre Pasteur du Cameroun, BP 1274, Yaounde´, Cameroun 2 Department of Infectious Disease Epidemiology, St Mary’s campus, Norfolk Place, London W2 1PG, UK 3 Infectious Disease Epidemiology Unit London School of Hygiene and Tropical Medicine Keppel Street, London WC1E 7HT, UK 4 Institut de Recherche pour le De´veloppement, UR 24 Epide´miologie et Pre´vention, CP 9214 Obrajes, La Paz, Bolivia 5 Institut de Recherche pour le De´veloppement, De´partement Socie´te´s et Sante´, 213 rue La Fayette, 75480 Paris Cedex 10, France (Received 16 August 2005; revised 3 October; revised 9 December 2005; accepted 9 December 2005; first published online 10 February 2006) SUMMARY Ivermectin treatment may induce severe adverse reactions in some individuals heavily infected with Loa loa. This hampers the implementation of mass ivermectin treatment against onchocerciasis in areas where Onchocerca volvulus and L. loa are co-endemic. In order to identify factors, including co-infections, which may explain the presence of high L. loa micro- filaraemia in some individuals, we analysed data collected in 19 villages of central Cameroon. Two standardized skin snips and 30 ml of blood were obtained from each of 3190 participants and the microfilarial (mf) loads of both O. -
Comparative Genomics of the Major Parasitic Worms
Comparative genomics of the major parasitic worms International Helminth Genomes Consortium Supplementary Information Introduction ............................................................................................................................... 4 Contributions from Consortium members ..................................................................................... 5 Methods .................................................................................................................................... 6 1 Sample collection and preparation ................................................................................................................. 6 2.1 Data production, Wellcome Trust Sanger Institute (WTSI) ........................................................................ 12 DNA template preparation and sequencing................................................................................................. 12 Genome assembly ........................................................................................................................................ 13 Assembly QC ................................................................................................................................................. 14 Gene prediction ............................................................................................................................................ 15 Contamination screening ............................................................................................................................ -
Compendium of Environment Statisetics
COMPENDIUM OF ENVIRONMENT STATISETICS ETHIOPIA 2016 THE FEDERAL DEMOCRATIC REPUBLIC OF ETHIOPIA NATIONAL PLANNING COMMISSION CENTRAL STATISTICAL AGENCY September/ 2017 Addis Ababa, Ethiopia THE FEDERAL DEMOCRATIC REPUBLIC OF ETHIOPIA NATIONAL PLANNING COMMISSION CENTRAL STATISTICAL AGENCY September/ 2017 Addis Ababa, Ethiopia Contact Persons: Mr. Habekiristos Beyene; Director: Agriculture, Natural Resource and Environment Statistics Directorate Email; [email protected] Mr. Alemesht Ayele; Senior Statistician: Agriculture, Natural Resource and Environment Statistics Directorate Email; [email protected] Central Statistical Agency of Ethiopia Addis Ababa P.O.BOX 1143 Telephone: +251-1155-30-11/+251-1156-38-82 Fax: +251-1111-5574/+251-1155-03-34 Website: www.csa.gov.et Table of Contents Page Table of Contents ..................................................................................................................... i LIST OF TABLES ................................................................................................................. iv LIST OF FIGURES .............................................................................................................. vii PREFACE .............................................................................................................................. ix ABBREVIATIONS AND ACRONYMS ................................................................................ x UNIT OF MEASUREMENT AND STANDARD EQUIVALENTS ..................................... xii 1. INTRODUCTION.............................................................................................................. -
STUDIES on CHANDLERELLA Hawkincf, a FILARIAL PARASITE of CROW
STUDIES ON CHANDLERELLA HAWKiNCf, A FILARIAL PARASITE OF CROW ABSTRACT Mthesis SUBMITtED' ' IN FULM.LMENT:OF THE:RHQUIREMENTS FOR THE DEGREE OF DOCTOR .OF PHlLOSdPHY IN . /nomRY SHAHNAZ BANO SECTION OF PARASITOLOGY DEPARTMENT OF ZOOLOGY ALIGARH MUSLIM UNIVERSITY ALIGARH January, 1981 ABSTRACT The thesis embodies the results of the studies on Chandlerella haukingi, a filarial parasite of Indian jungle crou, Corvus macrorhynchos (Uagler). Only four aspects, morphology, histology, histochemistry and in ^itro culture have been taken up. The morphological studies include a re description of adult worm uith an addition of a feu minor details in the adult. The structures described in microfilaria are the nuclear structures, cephalic structures, pharyngeal thread, Innenkorper and also occurrence of tuo forms of microfilariae in blood of crou. The nuclear structures naue been studied uith special reference to nuclear landmarks which are of great taxonomic vyalu^. Sometimes the nuclear structures do not suffice for identification of genera and soecies, the cephalic structures, pharyngeal thread and Innenkorper have also been studied. It has also been proved that the tuo forms of microfilariae, the long and the short, present in the blood of crou belono to the same species, C. haukingi. The stereoscan studies of the cuticular structures of the adult and the microfilaria have heen done as these are of great taxonomic importance in classification of uorms. The histological studies include the study of histological features of the body uall, musculature, alimentary canal and reproductiue organs as some of these structures provide a taxonomic tool at various levels. Among histochemical •^^tudies, four enzymes, viz; acid phosphatase, alkaline phosphatase, adenosine triphosphatase and carboxylesterase have been localized as these enzymes are attributed to different functions and their distribution is very specific. -
Projected Number of People with Onchocerciasis–Loiasis Coinfection in Africa, 1995 to 2025 Natalie V.S
Clinical Infectious Diseases MAJOR ARTICLE Projected Number of People With Onchocerciasis–Loiasis Coinfection in Africa, 1995 to 2025 Natalie V.S. Vinkeles Melchers,1 Luc E. Coffeng,1 Michel Boussinesq,2 Belén Pedrique,3 Sébastien D.S. Pion,2 Afework H. Tekle,4 Honorat G.M. Zouré,5 6 7,a 1,a Samuel Wanji, Jan H. Remme, and Wilma A. Stolk Downloaded from https://academic.oup.com/cid/advance-article-abstract/doi/10.1093/cid/ciz647/5532272 by guest on 29 October 2019 1Department of Public Health, Erasmus MC, University Medical Center Rotterdam, The Netherlands; 2Unité Mixte Internationale 233 TransVIHMI, Institut de Recherche pour le Développement (IRD), INSERM U1175, University of Montpellier, Montpellier, France; 3Research & Development Department, Drugs for Neglected Diseases initiative, and 4Preventive Chemotherapy and Transmission Control Unit, Control of Neglected Tropical Diseases Department, World Health Organization, Geneva, Switzerland; 5Expanded Special Project for Elimination of Neglected Tropical Diseases (ESPEN), World Health Organization, Regional Office for Africa, Cité du Djoué, Brazzaville, Republic of Congo; 6Parasites and Vectors Research Unit, Department of Microbiology and Parasitology, University of Buea, Cameroon; 7Ornex, France Background. Onchocerciasis elimination through mass drug administration (MDA) is hampered by coendemicity of Loa loa, as people with high L. loa microfilariae (mf) density can develop serious adverse events (SAEs) after ivermectin treatment. We assessed the geographical overlap of onchocerciasis and loiasis prevalence and estimated the number of coinfected individuals at risk of post- ivermectin SAEs in West and Central Africa from 1995 to 2025. Methods. Focusing on regions with suspected loiasis transmission in 14 countries, we overlaid precontrol maps of loiasis and onchocerciasis prevalence to calculate precontrol prevalence of coinfection by 5 km2 × 5 km2 pixel, distinguishing different categories of L. -
Classification and Nomenclature of Human Parasites Lynne S
C H A P T E R 2 0 8 Classification and Nomenclature of Human Parasites Lynne S. Garcia Although common names frequently are used to describe morphologic forms according to age, host, or nutrition, parasitic organisms, these names may represent different which often results in several names being given to the parasites in different parts of the world. To eliminate same organism. An additional problem involves alterna- these problems, a binomial system of nomenclature in tion of parasitic and free-living phases in the life cycle. which the scientific name consists of the genus and These organisms may be very different and difficult to species is used.1-3,8,12,14,17 These names generally are of recognize as belonging to the same species. Despite these Greek or Latin origin. In certain publications, the scien- difficulties, newer, more sophisticated molecular methods tific name often is followed by the name of the individual of grouping organisms often have confirmed taxonomic who originally named the parasite. The date of naming conclusions reached hundreds of years earlier by experi- also may be provided. If the name of the individual is in enced taxonomists. parentheses, it means that the person used a generic name As investigations continue in parasitic genetics, immu- no longer considered to be correct. nology, and biochemistry, the species designation will be On the basis of life histories and morphologic charac- defined more clearly. Originally, these species designa- teristics, systems of classification have been developed to tions were determined primarily by morphologic dif- indicate the relationship among the various parasite ferences, resulting in a phenotypic approach. -
Nematode Infections of the Eye: Toxocariasis, Onchocerciasis, Diffuse Unilateral Subacute Neuroretinitis, and Cysticercosis
Ophthalmol Clin N Am 15 (2002) 351–356 Nematode infections of the eye: toxocariasis, onchocerciasis, diffuse unilateral subacute neuroretinitis, and cysticercosis Nelson Alexandre Sabrosa, MD a,b,*, Moyse´s Zajdenweber, MD c,d aDepartment of Ophthalmology, University of Sa˜o Paulo, FMUSP, Sa˜o Paulo, Brazil bOphthalmology Department, Clı´nica Sa˜o Vicente, Rua Joao Borges, 204-Gavea, CEP 22451-100, Rio de Janeiro, Brazil cDepartment of Ophthalmology, Federal University of Sa˜o Paulo, Paulista School of Medicine, Sa˜o Paulo, Brazil dOphthalmology Department, Instituto Brasileiro de Oftalmologia, Praia de Botafogo 206, Botafogo, Rio de Janeiro, Brazil Ocular toxocariasis may cause a large spectrum of illitis, each of which can lead to loss of vision in the manifestations in the eye, from an asymptomatic affected eye [7]. posterior granuloma, to total retinal detachment [1]. It represents one of the most common parasitic causes Epidemiology of visual loss throughout the world [2], and it usually affects young children. Other nematodes can cause Human toxocariasis is probably one of the most ocular disease, most of them related to adult large widespread zoonotic nematode infections, occurring worms. Diffuse unilateral subacute neuroretinitis mainly in areas where the relationship between man, (DUSN) is a more recently described disorder soil, and dog is particularly close [8]. T canis is an believed to be caused by smaller nematodes [3,4]. often encountered canine parasite, affecting dogs, Onchocerciasis and cysticercosis are seen mainly in wolves, foxes, and other canidis, whereas T catis the developing world. may be found in domestic cats [9–11]. Human beings are contaminated through ingestion of the ova by geophagia, by eating contaminated foods, or by close Toxocariasis contact with puppies. -
Zoonotic Helminths Affecting the Human Eye Domenico Otranto1* and Mark L Eberhard2
Otranto and Eberhard Parasites & Vectors 2011, 4:41 http://www.parasitesandvectors.com/content/4/1/41 REVIEW Open Access Zoonotic helminths affecting the human eye Domenico Otranto1* and Mark L Eberhard2 Abstract Nowaday, zoonoses are an important cause of human parasitic diseases worldwide and a major threat to the socio-economic development, mainly in developing countries. Importantly, zoonotic helminths that affect human eyes (HIE) may cause blindness with severe socio-economic consequences to human communities. These infections include nematodes, cestodes and trematodes, which may be transmitted by vectors (dirofilariasis, onchocerciasis, thelaziasis), food consumption (sparganosis, trichinellosis) and those acquired indirectly from the environment (ascariasis, echinococcosis, fascioliasis). Adult and/or larval stages of HIE may localize into human ocular tissues externally (i.e., lachrymal glands, eyelids, conjunctival sacs) or into the ocular globe (i.e., intravitreous retina, anterior and or posterior chamber) causing symptoms due to the parasitic localization in the eyes or to the immune reaction they elicit in the host. Unfortunately, data on HIE are scant and mostly limited to case reports from different countries. The biology and epidemiology of the most frequently reported HIE are discussed as well as clinical description of the diseases, diagnostic considerations and video clips on their presentation and surgical treatment. Homines amplius oculis, quam auribus credunt Seneca Ep 6,5 Men believe their eyes more than their ears Background and developing countries. For example, eye disease Blindness and ocular diseases represent one of the most caused by river blindness (Onchocerca volvulus), affects traumatic events for human patients as they have the more than 17.7 million people inducing visual impair- potential to severely impair both their quality of life and ment and blindness elicited by microfilariae that migrate their psychological equilibrium. -
Infographics Gambella Ethiopia As of 31 January 2020.Ai
SOUTH SUDAN SITUATION as of 31 January 2020 Refugee population in Gambella region | SUB-OFFICE GAMBELLA K K Kule 310,683 Paga 44,293 Nguenyyiel PERSONS OF CONCERN Entry po 14% U p p e r N i l e 82,654 ?!F F Burbiey Lare Akula rol FAkula Woreda 27% K i Entry point F Nguenyyiell Ny Wa Jikawo Kule #B F 1,730 IItangtang Jewi $ Woreda #B 66,352 Woreda #B 1% WoredaWored HOUSEHOLDS Tierkidi SO Gambella 56,430 F FO Itang Jewi BaBaroro #B 18% Tierkidi Gambelambela Nuer Zuria ETHIOPIA Ayod Zone 63,154 Woreda Akobo 20% Woreda Abobo Jore Woreda Woreda GAMBELLAA AgnuakAg Pugnido2 OROMIA Average REGION Zone 9,052 REGION family size Pugnidodo 2 3% #B Pugnido#B Gog FO Pugnidognido Woreda 5 Pugnido 42,029 Mengesh 14% Gi lo Woreda Majang Zone Pochalla ?! SOUTH SUDAN Entry point Godere Woreda Dima Woreda JJ o o n n g g l l e e i i SNNPR REGION Main areas of origin Refugee Camp Upper Nile | 77% Refugee Transit Center Jonglei | 22% Okugo Refugee Location 11,341 Recent fleeing path Raad 3%OOkk go FU Dimma Entry point 10 km Entry point UNHCR Sub-Office UNHCR Field Office UNHCR Field Unit The boundaries and names shown and the designations used on this map do not imply official endorsement or acceptance by the United Nations. Age/Sex breakdown Female Male Key statistics Infants (0-4 yrs) 16% 8.0% 8.3% Female Male 66% Under 18 XZ Children (5-11 yrs) 32% 15.7% 15.9% 91% Women and Children ^Z Adolescents (12-17 yrs) 18% 8.1% 9.5% ^\ 18% Youth (15-24) \^ Adults (18-59 yrs) 32% 21.1% 11.0% 55% 45% Persons with Specific needs Elderly (60+) 2% 1.6% 0.6% 4,270 Unaccompanied -
Detection of the Filarial Parasite Mansonella Streptocerca in Skin Biopsies by a Nested Polymerase Chain Reaction-Based Assay Peter U
Smith ScholarWorks Biological Sciences: Faculty Publications Biological Sciences 1998 Detection of the Filarial Parasite Mansonella streptocerca in Skin Biopsies by a Nested Polymerase Chain Reaction-Based Assay Peter U. Fischer Dietrich W. Büttner Jotham Bamuhiiga Steven A. Williams Smith College, [email protected] Follow this and additional works at: https://scholarworks.smith.edu/bio_facpubs Part of the Biology Commons Recommended Citation Fischer, Peter U.; Büttner, Dietrich W.; Bamuhiiga, Jotham; and Williams, Steven A., "Detection of the Filarial Parasite Mansonella streptocerca in Skin Biopsies by a Nested Polymerase Chain Reaction-Based Assay" (1998). Biological Sciences: Faculty Publications, Smith College, Northampton, MA. https://scholarworks.smith.edu/bio_facpubs/41 This Article has been accepted for inclusion in Biological Sciences: Faculty Publications by an authorized administrator of Smith ScholarWorks. For more information, please contact [email protected] Am. J. Trop. Med. Hyg., 58(6), 1998, pp. 816±820 Copyright q 1998 by The American Society of Tropical Medicine and Hygiene DETECTION OF THE FILARIAL PARASITE MANSONELLA STREPTOCERCA IN SKIN BIOPSIES BY A NESTED POLYMERASE CHAIN REACTION±BASED ASSAY PETER FISCHER, DIETRICH W. BUÈ TTNER, JOTHAM BAMUHIIGA, AND STEVEN A. WILLIAMS Clark Science Center, Department of Biological Sciences, Smith College, Northampton, Massachusetts; Department of Helminthology and Entomology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany; German Agency for Technical Cooperation and Basic Health Services, Fort Portal, Uganda Abstract. To differentiate the skin-dwelling ®lariae Mansonella streptocerca and Onchocerca volvulus, a nested polymerase chain reaction (PCR) assay was developed from small amounts of parasite material present in skin biopsies. One nonspeci®c and one speci®c pair of primers were used to amplify the 5S rDNA spacer region of M. -
Emergence of Onchocerca Volvulus from Skin Mimicking Dracunculiasis Medinensis
Am. J. Trop. Med. Hyg., 83(6), 2010, pp. 1348–1351 doi:10.4269/ajtmh.2010.10-0475 Copyright © 2010 by The American Society of Tropical Medicine and Hygiene Case Report: Emergence of Onchocerca volvulus from Skin Mimicking Dracunculiasis medinensis Mark L. Eberhard ,* Ernesto Ruiz-Tiben , Andrew S. Korkor , Sharon L. Roy , and Philip Downs Division of Parasitic Diseases and Malaria, Centers for Disease Control and Prevention, Atlanta, Georgia; The Carter Center, Atlanta, Georgia; Ghana Guinea Worm Eradication Programme, Ministry of Health/Ghana Health Services, Tamale, Ghana Abstract. We describe 11 cases of suspected Dracunculus medinensis infection in which the worm recovered was iden- tified as Onchocerca volvulus . Identification was based on morphology of the examined specimen. A global campaign to eradicate Guinea worm disease (dra- blemish, pimple, or open lesion was present from which the cunculiasis) began in 1980 1 and, in the ensuing 30 years, tre- worm was removed. Several of these lesions resembled the mendous progress has been achieved. 2, 3 Fewer than 4,000 emergence of a true Guinea worm, except that the worm was cases of Guinea worm disease were reported in 2009, and only smaller or thinner than normal ( Figures 1 and 2 ). In others 764 cases were reported during January–June 2010; more than lesions ( Figure 3 ), the appearance was not typical of Guinea 97% of the cases reported in 2010 have been from only one worm, but because the worm was removed through the skin, it country, (Sudan). 2, 3 Part of the rigorous monitoring and sur- was classified initially by program staff in country as Guinea veillance inherent in the eradication programs within countries worm.