DOCSLIB.ORG

Distribution, Prevalence, and Genetic Characterization Of

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Distribution, Prevalence, and Genetic Characterization Of DISTRIBUTION, PREVALENCE, AND GENETIC CHARACTERIZATION OF BAYLISASCARIS PROCYONIS IN SELECTED AREAS OF GEORGIA AND FLORIDA by EMILY LAUREN BLIZZARD (Under the Direction of Michael J. Yabsley) ABSTRACT Baylisascaris procyonis an intestinal nematode commonly found in raccoons (Procyon lotor) can cause fatal larval migrans in numerous species of mammals, birds, and humans. This study investigated the distribution and prevalence of B. procyonis in populations of raccoons in Georgia and Florida. Intestinal tracts of 312 raccoons from 25 Georgia counties and 52 raccoons from three Florida counties were examined for B. procyonis. B. procyonis was detected in Clarke County where 12 of 116 (10.3%) raccoons were infected and 11 B. procyonis worms were collected from northern Florida. Sequence analysis of the 18S and 5.8S rRNA genes and the internal transcribed spacer (ITS)-1 and -2 regions confirmed Georgia samples were B. procyonis. These data indicate that the distribution of B. procyonis within Georgia is increasing and now present in Florida. Limited genetic variability was found in the rRNA and ITS gene regions among B. procyonis from the southern United States. INDEX WORDS: Baylisascaris procyonis, zoonotic, Georgia, Florida, raccoons DISTRIBUTION, PREVALENCE, AND GENETIC CHARACTERIZATION OF BAYLISASCARIS PROCYONIS IN SELECTED AREAS OF GEORGIA AND FLORIDA by EMILY LAUREN BLIZZARD B.S., Georgia Southern University, 2006 A Thesis Submitted to the Graduate Faculty of The University of Georgia in Partial Fulfillment of the Requirements for the Degree MASTER OF SCIENCE ATHENS, GEORGIA 2010 © 2010 Emily Lauren Blizzard All Rights Reserved DISTRIBUTION, PREVALENCE, AND GENETIC CHARACTERIZATION OF BAYLISASCARIS PROCYONIS IN SELECTED AREAS OF GEORGIA AND FLORIDA by EMILY LAUREN BLIZZARD Major Professor: Michael J. Yabsley Committee: Steven B. Castleberry David E. Stallknecht Electronic Version Approved: Maureen Grasso Dean of the Graduate School The University of Georgia May 2010 ACKNOWLEDGEMENTS I would like thank my major advisor, Dr. Michael Yabsley, for allowing me the opportunity to work on this project. I would not be completing my Master’s degree today if he had not taken a chance and given me the opportunity to work with him. Additionally, this project would not have been possible without his valuable advice, guidance, and encouragement. I would like to thank my committee members, Dr. Steven B. Castleberry and Dr. David E. Stallknecht for their invaluable advice and input. I would also like to thank D. Kavanaugh and J. Smith (APHIS/USDA/WS), C. Groce (WKU), B. Hanson, K. Pederson, B. Wilcox, B. Adler, J. Carroll, G. Doster, S. Ellis-Felege, J. Gonynor, N. Jenkins, J. Slusher, J. Parris, W. Kistler, and B. Shock (UGA) for field assistance and/or permission to collect raccoons. To all the many research technicians, students, and diagnosticians at the S.C.W.D.S your assistance both in the field and in the laboratory was invaluable. Finally, I would like to thank my family, friends, and lab mates for their support, encouragement, patience, friendship, and love. To my lab mates you all are some of the most intelligent, dedicated, passionate, people I have ever met and I have cherished every moment I have been able to spend working with you all. Each of you has become very special to me and I am proud to be considered your friend. I thank you all for your constant encouragement and friendship. You have truly helped to shape the person I have become. Most importantly, I would like to thank my parents for their never wavering faith, encouragement, patience, support, and love. iv TABLE OF CONTENTS Page ACKNOWLEDGEMENTS ........................................................................................................... iv LIST OF TABLES ........................................................................................................................ vii LIST OF FIGURES ..................................................................................................................... viii CHAPTER 1 INTRODUCTION AND LITERATURE REVIEW .....................................................1 Introduction ...............................................................................................................1 Description and History .............................................................................................3 Distribution and Prevalence ......................................................................................3 Host Range and Life Cycle .......................................................................................5 Clinical Signs and Pathology ..................................................................................12 Potential as a Bioterrorism Agent ...........................................................................12 Diagnosis .................................................................................................................13 Treatment .................................................................................................................15 Methods of Decontamination ..................................................................................16 Conclusions .............................................................................................................17 Literature Cited ........................................................................................................18 2 DISTRIBUTION, PREVALENCE, AND GENETIC CHARACTERIZATION OF BAYLISASCARIS PROCYONIS IN SELECTED AREAS OF GEORGIA .............36 Abstract ...................................................................................................................37 v Introduction .............................................................................................................38 Materials and Methods ............................................................................................39 Data Analysis ..........................................................................................................40 Genetic Characterization .........................................................................................41 Results .....................................................................................................................42 Discussion ...............................................................................................................43 Acknowledgements .................................................................................................47 Literature Cited ........................................................................................................48 3 GEOGRAPHIC EXPANSION OF BAYLISASCARIS PROCYONIS, FLORIDA .......59 Abstract ...................................................................................................................60 Introduction .............................................................................................................60 The Study ................................................................................................................61 Conclusions .............................................................................................................62 Literature Cited ........................................................................................................63 4 CONCLUSIONS..........................................................................................................66 Literature Cited ........................................................................................................68 vi LIST OF TABLES Page Table 1.1: Previous studies conducted in various regions of the United States investigating the prevalence of Baylisascaris procyonis in raccoons (Procyon lotor) .............................28 Table 1.2: Review of human Baylisascaris procyonis infections from 1975 to 2008 ...................29 Table 2.1: Prevalence of Baylisascaris procyonis in raccoons captured from 1997 to 2009 from 25 counties in Georgia ...................................................................................................55 Table 2.2: Relationships between Baylisascaris procyonis prevalence and age, sex, season, and land-use in Clarke County, Georgia ..............................................................................56 Table 2.3: Nucleotide sequence variations within the internal transcribed spacer (ITS)-1 region of Baylisascaris procynois from Georgia (GA), Texas (TX), and Kentucky (KY) ......57 Table 2.4: Nucleotide sequence variations within the internal transcribed spacer (ITS)-2 region of Baylisascaris procyonis from Georgia (GA), Texas (TX), and Kentucky (KY) ......58 vii LIST OF FIGURES Page Figure 1.1: General distribution and percent of raccoons infected with Baylisascaris procyonis in the United States ............................................................................................................34 Figure 1.2: Life cycle of Baylisascaris procyonis .........................................................................35 viii CHAPTER 1 INTRODUCTION AND LITERATURE REVIEW Introduction Baylisascaris procyonis, is an intestinal nematode commonly found in raccoons (Procyon lotor), in some areas of the United States. This parasite is significant because in non-raccoon hosts, larvae undergo extensive migrans through the body which can result in severe disease. These larvae can migrate through any tissue and can cause visceral larval migrans (VLM), ocular larval migrans (OLM), or the
Load more

Recommended publications
  • Strongyloides Myopotami (Secernentea: Strongyloididae) from the Intestine of Feral Nutrias (Myocastor Coypus) in Korea
    ISSN (Print) 0023-4001 ISSN (Online) 1738-0006 Korean J Parasitol Vol. 52, No. 5: 531-535, October 2014 ▣ CASE REPORT http://dx.doi.org/10.3347/kjp.2014.52.5.531 Strongyloides myopotami (Secernentea: Strongyloididae) from the Intestine of Feral Nutrias (Myocastor coypus) in Korea Seongjun Choe, Dongmin Lee, Hansol Park, Mihyeon Oh, Hyeong-Kyu Jeon, Keeseon S. Eom* Department of Parasitology, Medical Research Institute and Parasite Resource Bank, Chungbuk National University School of Medicine, Cheongju 361-763, Korea Abstract: Surveys on helminthic fauna of the nutria, Myocastor coypus, have seldom been performed in the Republic of Korea. In the present study, we describe Strongyloides myopotami (Secernentea: Strongyloididae) recovered from the small intestine of feral nutrias. Total 10 adult nutrias were captured in a wetland area in Gimhae-si (City), Gyeongsangnam- do (Province) in April 2013. They were transported to our laboratory, euthanized with ether, and necropsied. About 1,300 nematode specimens were recovered from 10 nutrias, and some of them were morphologically observed by light and scanning electron microscopies. They were 3.7-4.7 (4.0± 0.36) mm in length, 0.03-0.04 (0.033) mm in width. The worm dimension and other morphological characters, including prominent lips of the vulva, blunted conical tail, straight type of the ovary, and 8-chambered stoma, were all consistent with S. myopotami. This nematode fauna is reported for the first time in Korea. Key words: Strongyloides myopotami, nutria, Myocastor coypus The nutria (Myocastor coypus) or coypu rat is a large rodent notic diseases caused by viruses, bacteria, and parasites [1].
    [Show full text]
  • Angiostrongylus Cantonensis: a Review of Its Distribution, Molecular Biology and Clinical Significance As a Human
    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/303551798 Angiostrongylus cantonensis: A review of its distribution, molecular biology and clinical significance as a human... Article in Parasitology · May 2016 DOI: 10.1017/S0031182016000652 CITATIONS READS 4 360 10 authors, including: Indy Sandaradura Richard Malik Centre for Infectious Diseases and Microbiolo… University of Sydney 10 PUBLICATIONS 27 CITATIONS 522 PUBLICATIONS 6,546 CITATIONS SEE PROFILE SEE PROFILE Derek Spielman Rogan Lee University of Sydney The New South Wales Department of Health 34 PUBLICATIONS 892 CITATIONS 60 PUBLICATIONS 669 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: Create new project "The protective rate of the feline immunodeficiency virus vaccine: An Australian field study" View project Comparison of three feline leukaemia virus (FeLV) point-of-care antigen test kits using blood and saliva View project All content following this page was uploaded by Indy Sandaradura on 30 May 2016. The user has requested enhancement of the downloaded file. All in-text references underlined in blue are added to the original document and are linked to publications on ResearchGate, letting you access and read them immediately. 1 Angiostrongylus cantonensis: a review of its distribution, molecular biology and clinical significance as a human pathogen JOEL BARRATT1,2*†, DOUGLAS CHAN1,2,3†, INDY SANDARADURA3,4, RICHARD MALIK5, DEREK SPIELMAN6,ROGANLEE7, DEBORAH MARRIOTT3, JOHN HARKNESS3, JOHN ELLIS2 and DAMIEN STARK3 1 i3 Institute, University of Technology Sydney, Ultimo, NSW, Australia 2 School of Life Sciences, University of Technology Sydney, Ultimo, NSW, Australia 3 Department of Microbiology, SydPath, St.
    [Show full text]
  • Angiostrongylus Cantonensis in Recife, Pernambuco, Brazil
    Letter Arq Neuropsiquiatr 2009;67(4):1093-1096 AlicAtA DiSEASE Neuroinfestation by Angiostrongylus cantonensis in Recife, Pernambuco, Brazil Ana Rosa Melo Correa Lima1, Solange Dornelas Mesquita2, Silvana Sobreira Santos1, Eduardo Raniere Pessoa de Aquino1, Luana da Rocha Samico Rosa3, Fábio Souza Duarte3, Alessandra Oliveira Teixeira1, Zenize Rocha da Silva Costa4, Maria Lúcia Brito Ferreira5 Angiostrongylus cantonensis, is a nematode in the panying the patient reported that she had presented a rash as- Secernentea class, Strongylidae order, Metastrongylidæ sociated with joint pain, followed by progressive difficulty in superfamily and Angiostrongylidæ family1, and is the walking for 30 days, which was associated with sleepiness over most common cause of human eosinophilic meningi- the last 15 days. tis worldwide. This parasite has rats and other mammals In the patient’s past history, there were references to mental as definitive hosts and snails, freshwater shrimp, fish, retardation and lack of ability to understanding simple orders. frogs and monitor lizards as intermediate hosts1. Mam- She presented independent gait and had frequently run away mals are infected by ingestion of intermediate hosts from home into the surrounding area. There was mention of in- and raw/undercooked snails or vegetables, contain- voluntary movements, predominantly of the upper limbs, which ing third-stage larvae2. Once infested, the larvae pen- intensified after the change of health status that motivated the etrate the vasculature of the intestinal tract and pro- current search for medical assistance. In November 2007, the pa- mote an inflammatory reaction with eosinophilia and tient presented with generalized tonic-clonic seizures and was lymphocytosis. This produces rupture of the blood- medicated with carbamazepine, 200 mg/twice a day.
    [Show full text]
  • Worms, Nematoda
    University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Faculty Publications from the Harold W. Manter Laboratory of Parasitology Parasitology, Harold W. Manter Laboratory of 2001 Worms, Nematoda Scott Lyell Gardner University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/parasitologyfacpubs Part of the Parasitology Commons Gardner, Scott Lyell, "Worms, Nematoda" (2001). Faculty Publications from the Harold W. Manter Laboratory of Parasitology. 78. https://digitalcommons.unl.edu/parasitologyfacpubs/78 This Article is brought to you for free and open access by the Parasitology, Harold W. Manter Laboratory of at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Faculty Publications from the Harold W. Manter Laboratory of Parasitology by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Published in Encyclopedia of Biodiversity, Volume 5 (2001): 843-862. Copyright 2001, Academic Press. Used by permission. Worms, Nematoda Scott L. Gardner University of Nebraska, Lincoln I. What Is a Nematode? Diversity in Morphology pods (see epidermis), and various other inverte- II. The Ubiquitous Nature of Nematodes brates. III. Diversity of Habitats and Distribution stichosome A longitudinal series of cells (sticho- IV. How Do Nematodes Affect the Biosphere? cytes) that form the anterior esophageal glands Tri- V. How Many Species of Nemata? churis. VI. Molecular Diversity in the Nemata VII. Relationships to Other Animal Groups stoma The buccal cavity, just posterior to the oval VIII. Future Knowledge of Nematodes opening or mouth; usually includes the anterior end of the esophagus (pharynx). GLOSSARY pseudocoelom A body cavity not lined with a me- anhydrobiosis A state of dormancy in various in- sodermal epithelium.
    [Show full text]
  • Fibre Couplings in the Placenta of Sperm Whales, Grows to A
    news and views Most (but not all) nematodes are small Daedalus and nondescript. For example, Placento- T STUDIOS nema gigantissima, which lives as a parasite Fibre couplings in the placenta of sperm whales, grows to a CS./HOL length of 8 m, with a diameter of 2.5 cm. The The nail, says Daedalus, is a brilliant and free-living, marine Draconema has elongate versatile fastener, but with a fundamental O ASSO T adhesive organs on the head and along the contradiction. While being hammered in, HO tail, and moves like a caterpillar. But the gen- it is a strut, loaded in compression. It must BIOP eral uniformity of most nematode species be thick enough to resist buckling. Yet has hampered the establishment of a classifi- once in place it is a tie, loaded in tension, 8 cation that includes both free-living and par- and should be thin and flexible to bear its asitic species. Two classes have been recog- load efficiently. He is now resolving this nized (the Secernentea and Adenophorea), contradiction. based on the presence or absence of a caudal An ideal nail, he says, should be driven sense organ, respectively. But Blaxter et al.1 Figure 2 The bad — eelworm (root knot in by a force applied, not to its head, but to have concluded from the DNA sequences nematode), which forms characteristic nodules its point. Its shaft would then be drawn in that the Secernentea is a natural group within on the roots of sugar beet and rice. under tension; it could not buckle, and the Adenophorea.
    [Show full text]
  • Subclase Secernentea
    Orden Ascaridida T. 21. ASCARIDIDOS. Generalidades y Clasificación. Incluye parásitos con tres labios de gran tamaño. En los machos, cuando existen alas caudales, éstas se localizan Ascaridioideos y Anisakoideos. lateralmente. 1. GENERALIDADES Y CLASIFICACIÓN Los ascarídidos son nematodos con fasmidios (quimiorreceptores posteriores); pertenecen por tanto a la Clase Secernentea. Los machos presentan generalmente alas caudales o bolsas copuladoras. Los ascarídidos de interés veterinario se clasifican en base al siguiente esquema taxonómico: Orden Ascaridida Superfamilia Ascaridoidea Familia Ascarididae Género Ascaris Género Parascaris Género Toxocara Género Toxascaris Fig. 1. Extremo caudal del macho en Ascarididae. Superfamilia Anisakoidea Familia Anisakidae Género Anisakis Superfamilia Ascaridoidea Género Contracaecum Género Phocanema Por lo general son nematodos de gran tamaño. No Género Pseudoterranova presentan cápsula bucal y el esófago carece de bulbo posterior Superfamilia Heterakoidea pronunciado. En algunas especies el esófago está seguido de un Familia Heterakidae: G. Heterakis ventrículo posterior corto que puede derivarse en un apéndice Familia Ascaridiidae: G. Ascaridia 1 ventricular, mientras que otras presentan una prolongación del 2.1. GÉNERO ASCARIS intestino en sentido craneal que se conoce como ciego intestinal (Fig. 12, Familia Anisakidae). Existen dos espículas en los machos Ascaris suum y el ciclo de vida puede ser directo o indirecto. Es un parásito del cerdo con distribución cosmopolita y de 2. FAMILIA ASCARIDIDAE considerable importancia económica. Sin embargo, su prevalencia está disminuyendo debido a los cada vez más frecuentes sistemas Los labios, que como característica del Orden están bien de producción intensiva y a la instauración de tratamientos desarrollados, presentan una serie de papilas labiales externas e antihelmínticos periódicos. Durante años se ha considerado internas, así como un borde denticular en su cara interna.
    [Show full text]
  • Habitat Characteristics As Potential Drivers of the Angiostrongylus Daskalovi Infection in European Badger (Meles Meles) Populations
    pathogens Article Habitat Characteristics as Potential Drivers of the Angiostrongylus daskalovi Infection in European Badger (Meles meles) Populations Eszter Nagy 1, Ildikó Benedek 2, Attila Zsolnai 2 , Tibor Halász 3,4, Ágnes Csivincsik 3,5, Virág Ács 3 , Gábor Nagy 3,5,* and Tamás Tari 1 1 Institute of Wildlife Management and Wildlife Biology, Faculty of Forestry, University of Sopron, H-9400 Sopron, Hungary; [email protected] (E.N.); [email protected] (T.T.) 2 Institute of Animal Breeding, Kaposvár Campus, Hungarian University of Agriculture and Life Sciences, H-7400 Kaposvár, Hungary; [email protected] (I.B.); [email protected] (A.Z.) 3 Institute of Physiology and Animal Nutrition, Kaposvár Campus, Hungarian University of Agriculture and Life Sciences, H-7400 Kaposvár, Hungary; [email protected] (T.H.); [email protected] (Á.C.); [email protected] (V.Á.) 4 Somogy County Forest Management and Wood Industry Share Co., H-7400 Kaposvár, Hungary 5 One Health Working Group, Kaposvár Campus, Hungarian University of Agriculture and Life Sciences, H-7400 Kaposvár, Hungary * Correspondence: [email protected] Abstract: From 2016 to 2020, an investigation was carried out to identify the rate of Angiostrongylus spp. infections in European badgers in Hungary. During the study, the hearts and lungs of 50 animals were dissected in order to collect adult worms, the morphometrical characteristics of which were used Citation: Nagy, E.; Benedek, I.; for species identification. PCR amplification and an 18S rDNA-sequencing analysis were also carried Zsolnai, A.; Halász, T.; Csivincsik, Á.; out.
    [Show full text]
  • Symbionts and Diseases Associated with Invasive Apple Snails
    Symbionts and diseases associated with invasive apple snails Cristina Damborenea, Francisco Brusa and Lisandro Negrete CONICET, División Zoología Invertebrados, Museo de La Plata (FCNyM-UNLP), Paseo del Bosque, 1900 La Plata, Argentina. Email: [email protected], fbrusa@ fcnym.unlp.edu.ar, [email protected] Abstract This contribution summarizes knowledge of organisms associated with apple snails, mainly Pomacea spp., either in a facultative or obligate manner, paying special attention to diseases transmitted via these snails to humans. A wide spectrum of epibionts on the shell and operculum of snails are discussed. Among them algae, ciliates, rotifers, nematodes, flatworms, oligochaetes, dipterans, bryozoans and leeches are facultative, benefitting from the provision of substrate, transport, access to food and protection. Among obligate symbionts, five turbellarian species of the genusTemnocephala are known from the branchial cavity, with T. iheringi the most common and abundant. The leech Helobdella ampullariae also spends its entire life cycle inside the branchial cavity; two copepod species and one mite are found in different sites inside the snails. Details of the nature of the relationships of these specific obligate symbionts are poorly known. Also, extensive studies of an intracellular endosymbiosis are summarized. Apple snails are the first or second hosts of several digenean species, including some bird parasites.A number of human diseases are transmitted by apple snails, angiostrongyliasis being the most important because of the potential seriousness of the disease. Additional keywords: Ampullariidae, Angiostrongylus, commensals, diseases, epibionts, parasites, Pomacea, symbiosis 73 Introduction The term “apple snail” refers to a number of species of freshwater snails belonging to the family Ampullariidae (Caenogastropoda) inhabiting tropical and subtropical regions (Hayes et al., 2015).
    [Show full text]
  • Burrowing Nematode Radopholus Similis (Cobb, 1893) Thorne, 1949 (Nematoda: Secernentea: Tylenchida: Pratylenchidae: Pratylenchinae)1 Nicholas Sekora and William T
    EENY-542 Burrowing Nematode Radopholus similis (Cobb, 1893) Thorne, 1949 (Nematoda: Secernentea: Tylenchida: Pratylenchidae: Pratylenchinae)1 Nicholas Sekora and William T. Crow2 Introduction by fine textured soils rich in organic matter. However, soil texture plays a less important role on nematode population Radopholus similis, the burrowing nematode, is the most levels on banana (O’Bannon 1977). economically important nematode parasite of banana in the world. Infection by burrowing nematode causes toppling disease of banana, yellows disease of pepper and spreading Life Cycle and Biology decline of citrus. These diseases are the result of burrowing Burrowing nematode is an endoparasitic migratory nema- nematode infection destroying root tissue, leaving plants tode, meaning it completes its life cycle within root tissue. with little to no support or ability to take up water and All motile juvenile stages and females can infect root tissue translocate nutrients. Because of the damage that it causes at any point along the length of a root. After root penetra- to citrus, ornamentals and other agricultural industries, tion, these life stages mainly feed and migrate into the worldwide, burrowing nematode is one of the most regu- cortical parenchyma and also into the stele. Mature males lated nematode plant pests (Hockland et al. 2006). of burrowing nematode are not infective. As the mature females migrate through root tissue, they lay eggs that are Distribution produced through either sexual reproduction with males or by hermaphroditistim (Thorne 1961, Kaplan and Burrowing nematode is native to Australasia, but is found worldwide in tropical and subtropical regions of Africa, Opperman 2000). Once an egg hatches, the emergent Asia, Australia, North and South America, and many second-stage juvenile can migrate within the root and island regions.
    [Show full text]
  • Epidemiology of Angiostrongylus Cantonensis and Eosinophilic Meningitis
    Epidemiology of Angiostrongylus cantonensis and eosinophilic meningitis in the People’s Republic of China INAUGURALDISSERTATION zur Erlangung der Würde eines Doktors der Philosophie vorgelegt der Philosophisch-Naturwissenschaftlichen Fakultät der Universität Basel von Shan Lv aus Xinyang, der Volksrepublik China Basel, 2011 Genehmigt von der Philosophisch-Naturwissenschaftlichen Fakult¨at auf Antrag von Prof. Dr. Jürg Utzinger, Prof. Dr. Peter Deplazes, Prof. Dr. Xiao-Nong Zhou, und Dr. Peter Steinmann Basel, den 21. Juni 2011 Prof. Dr. Martin Spiess Dekan der Philosophisch- Naturwissenschaftlichen Fakultät To my family Table of contents Table of contents Acknowledgements 1 Summary 5 Zusammenfassung 9 Figure index 13 Table index 15 1. Introduction 17 1.1. Life cycle of Angiostrongylus cantonensis 17 1.2. Angiostrongyliasis and eosinophilic meningitis 19 1.2.1. Clinical manifestation 19 1.2.2. Diagnosis 20 1.2.3. Treatment and clinical management 22 1.3. Global distribution and epidemiology 22 1.3.1. The origin 22 1.3.2. Global spread with emphasis on human activities 23 1.3.3. The epidemiology of angiostrongyliasis 26 1.4. Epidemiology of angiostrongyliasis in P.R. China 28 1.4.1. Emerging angiostrongyliasis with particular consideration to outbreaks and exotic snail species 28 1.4.2. Known endemic areas and host species 29 1.4.3. Risk factors associated with culture and socioeconomics 33 1.4.4. Research and control priorities 35 1.5. References 37 2. Goal and objectives 47 2.1. Goal 47 2.2. Objectives 47 I Table of contents 3. Human angiostrongyliasis outbreak in Dali, China 49 3.1. Abstract 50 3.2.
    [Show full text]
  • Genetic Characterization of Angiostrongylus
    Genetic Characterization of Angiostrongylus Cantonensis Isolates from Different Regions of Ecuador Introduction The genetic aspects of this parasite Detection and Identification. En Methods Invasive Snails and an Emerging Instituto Oswaldo Cruz, 90(5), 605-609. Thiengo, S. C., de Oliveira Simões, R., Fernandez, Caracterización Genética de Angiostrongylus Cantonensis have been explored in a systematic and in Microbiology (Vol. 42, pp. 525-554). Infectious Disease: Results from the First https://doi.org/10.1590/S0074-02761995 M. A., & Júnior, A. M. (2013). phylogenic way. The sequences of Elsevier. https://doi.org/10.1016/bs.mim. National Survey on Angiostrongylus 000500011 Angiostrongylus cantonensis and Rat Angiostrongylus cantonensis was first 2015.06.004 cantonensis in China. PLOS Neglected Lungworm Disease in Brazil. Hawai’i Aislados de Diferentes Regiones de Ecuador described in rats in Guangzhou (Canton), nuclear and mitochondrial genes have Tropical Diseases, 3(2), e368. Pincay, T., García, L., Narváez, E., Decker, O., Journal of Medicine & Public Health, Luis Solórzano Alava 1, Cesar Bedoya Pilozo 2, Hilda Hernández Alvarez 3, Misladys Rodriguez 4, Lazara Rojas Rivero5, Francisco Sánchez China, in 1935 (Chen, 1935). This been used for molecular differentiation Galtier, N., Nabholz, B., Glémin, S., & Hurst, G. https://doi.org/10.1371/journal.pntd.0000 Martini, L., & Moreira, J. (2009). 72(6 Suppl 2), 18-22. Amador 6, Marcelo Muñoz Naranjo 7, Cecibel Ramirez 8, Rita Loja Chango 9, José Pizarro Velastegui 10, Alessandra Loureiro Morasutti 11 nematode also infects humans and is the and phylogenetic analyzes of D. D. (2009). Mitochondrial DNA as a 368 Angiostrongiliasis por Parastrongylus INFORMACIÓN DEL Abstract main cause of eosinophilic Angiostrongylus species (Galtier et al., marker of molecular diversity: A (Angiostrongylus) cantonensis en Tokiwa, T., Harunari, T., Tanikawa, T., Komatsu, ARTÍCULO reappraisal.
    [Show full text]
  • Tokorhabditis N. Gen
    www.nature.com/scientificreports OPEN Tokorhabditis n. gen. (Rhabditida, Rhabditidae), a comparative nematode model for extremophilic living Natsumi Kanzaki1, Tatsuya Yamashita2, James Siho Lee3, Pei‑Yin Shih4,5, Erik J. Ragsdale6 & Ryoji Shinya2* Life in extreme environments is typically studied as a physiological problem, although the existence of extremophilic animals suggests that developmental and behavioral traits might also be adaptive in such environments. Here, we describe a new species of nematode, Tokorhabditis tufae, n. gen., n. sp., which was discovered from the alkaline, hypersaline, and arsenic‑rich locale of Mono Lake, California. The new species, which ofers a tractable model for studying animal‑specifc adaptations to extremophilic life, shows a combination of unusual reproductive and developmental traits. Like the recently described sister group Auanema, the species has a trioecious mating system comprising males, females, and self‑fertilizing hermaphrodites. Our description of the new genus thus reveals that the origin of this uncommon reproductive mode is even more ancient than previously assumed, and it presents a new comparator for the study of mating‑system transitions. However, unlike Auanema and almost all other known rhabditid nematodes, the new species is obligately live‑bearing, with embryos that grow in utero, suggesting maternal provisioning during development. Finally, our isolation of two additional, molecularly distinct strains of the new genus—specifcally from non‑extreme locales— establishes a comparative system for the study of extremophilic traits in this model. Extremophilic animals ofer a window into how development, sex, and behavior together enable resilience to inhospitable environments. A challenge to studying such animals has been to identify those amenable to labo- ratory investigation1,2.
    [Show full text]