Faculdade De Medicina Veterinária
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Baylisascariasis
Baylisascariasis Importance Baylisascaris procyonis, an intestinal nematode of raccoons, can cause severe neurological and ocular signs when its larvae migrate in humans, other mammals and birds. Although clinical cases seem to be rare in people, most reported cases have been Last Updated: December 2013 serious and difficult to treat. Severe disease has also been reported in other mammals and birds. Other species of Baylisascaris, particularly B. melis of European badgers and B. columnaris of skunks, can also cause neural and ocular larva migrans in animals, and are potential human pathogens. Etiology Baylisascariasis is caused by intestinal nematodes (family Ascarididae) in the genus Baylisascaris. The three most pathogenic species are Baylisascaris procyonis, B. melis and B. columnaris. The larvae of these three species can cause extensive damage in intermediate/paratenic hosts: they migrate extensively, continue to grow considerably within these hosts, and sometimes invade the CNS or the eye. Their larvae are very similar in appearance, which can make it very difficult to identify the causative agent in some clinical cases. Other species of Baylisascaris including B. transfuga, B. devos, B. schroeder and B. tasmaniensis may also cause larva migrans. In general, the latter organisms are smaller and tend to invade the muscles, intestines and mesentery; however, B. transfuga has been shown to cause ocular and neural larva migrans in some animals. Species Affected Raccoons (Procyon lotor) are usually the definitive hosts for B. procyonis. Other species known to serve as definitive hosts include dogs (which can be both definitive and intermediate hosts) and kinkajous. Coatimundis and ringtails, which are closely related to kinkajous, might also be able to harbor B. -
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]. -
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. -
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. -
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. -
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. -
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). -
AAVP 1995 Annual Meeting Proceedings
Joint Meeting of The American Society of Parasitologists & The American Association of Veterinary Parasitologists July 6 july 1 0, 1995 Pittsburgh, Pennsylvania 2 ! j THE AMERICAN SOCIETY - OF PARASITOLOGISTS - & THE AMERICAN ASSOCIATION OF VETERINARY PARASITOLOGISTS ACKNOWLEDGE THEFOLLO~GCO~ANlliS FOR THEIR FINANCIAL SUPPORT: CORPORATE EVENT SPONSOR: PFIZER ANIMAL HEALTH CORPORATE SPONSORS: BOEHRINGER INGELHEIM ANIMAL HEALTH, INC. MALUNCKRODT VETERINARY, INC. THE UPJOHN CO. MEETING SPONSORS: AMERICAN CYANAMID CO. CIBA ANIMAL HEALTH ELl LILLY & CO. FERMENT A ANIMAL HEALTH HILL'S PET NUTRITION, INC. HOECHST-ROUSSEL AGRI-VET CO. IDEXX LABORATORIES, INC. MIDWEST VETERINARY SERVICES, INC. PARA VAX, INC. PROFESSIONAL LABORATORIES & RESEARCH SERVICES RHONE MERIEUX, INC. SCHERING-PLOUGH ANIMAL HEALTH SOLVAY ANIMAL HEALTH, INC. SUMITOMO CHEMICAL, LTO. SYNBIOTICS CORP. TRS LABS, INC. - - I I '1---.. --J 3 Announcing a Joint Meeting of THE AMERICAN SOCIETY THE AMERICAN ASSOCIATION Of OF PARASITOLOGISTS VETERINARY PARASITOLOGISTS (70th Meeting) (40th Meeting) Pittsburgh, Pennsylvania july 6-1 0, 1995 INFORMATION & REGISTRATION Hyatt Regency Hotel, 112 Washington Place THURSDAY Regency foyer, 2nd Floor t July 6th Registration Begins, Noon-5:00 p.m. FRIDAY Regency foyer, 2nd Floor t July 7th 8:00 a.m.-5:00 p.m. SATURDAY Regency foyer, 2nd Floor july 8th 8:00 a.m.-5:00p.m. SUNDAY Regency foyer, 2nd Floor july 9th 8:00 a.m.-Noon t Items for the Auction may be delivered to this location before 3:00p.m. on Friday, july 7th. 4 WELCOME RECEPTION Thursday, july 6th 7:00-1 0:00 p.m. Grand Ballroom SOCIAl, MATCH THE FACES & AUCTION Friday, July 7th Preview: 6:30-7:30 p.m. -
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. -
Taenia Infections Iowa State University Center for Food Security and Public Health
Center for Food Security and Public Health Center for Food Security and Public Health Technical Factsheets 5-1-2005 Taenia Infections Iowa State University Center for Food Security and Public Health Follow this and additional works at: http://lib.dr.iastate.edu/cfsph_factsheets Part of the Animal Diseases Commons, and the Veterinary Infectious Diseases Commons Recommended Citation Iowa State University Center for Food Security and Public Health, "Taenia Infections" (2005). Center for Food Security and Public Health Technical Factsheets. 131. http://lib.dr.iastate.edu/cfsph_factsheets/131 This Report is brought to you for free and open access by the Center for Food Security and Public Health at Iowa State University Digital Repository. It has been accepted for inclusion in Center for Food Security and Public Health Technical Factsheets by an authorized administrator of Iowa State University Digital Repository. For more information, please contact [email protected]. Taenia Etiology Taenia spp. are long, segmented, parasitic tapeworms (family Taeniidae, subclass Infections Cestoda). These parasites have an indirect life cycle, cycling between a definitive and an intermediate host. The following Taenia species are zoonotic, with humans serving Taeniasis, as the definitive host, the intermediate host, or both. Non-zoonotic species of Taenia also exist. Cysticercosis, Neurocysticercosis, Taeniasis Coenurosis, The adult tapeworms live in the intestines of the definitive hosts. This infection is Neurocoenurosis called taeniasis. Humans are the definitive hosts for Taenia solium (the pork tapeworm) and T. saginata (the beef tapeworm). Humans are also the definitive hosts for T. asiatica, a newly recognized tapeworm found in Asia. It is currently uncertain Last Updated: May 2005 whether T. -
Trichuriasis Importance Trichuriasis Is Caused by Various Species of Trichuris, Nematode Parasites Also Known As Whipworms
Trichuriasis Importance Trichuriasis is caused by various species of Trichuris, nematode parasites also known as whipworms. Whipworms are common in the intestinal tracts of mammals, Trichocephaliasis, although their prevalence may be low in some host species or regions. Infections are Trichocephalosis, often asymptomatic; however, some individuals develop diarrhea, and more serious Whipworm Infestation effects, including dysentery, intestinal bleeding and anemia, are possible if the worm burden is high or the individual is particularly susceptible. T. trichiura is the species of whipworm normally found in humans. A few clinical cases have been attributed to Last Updated: January 2019 T. vulpis, a whipworm of canids, and T. suis, which normally infects pigs. While such zoonotic infections are generally thought uncommon, recent surveys found T. suis or T. vulpis eggs in a significant number of human fecal samples in some countries. T. suis is also being investigated in human clinical trials as a therapeutic agent for various autoimmune and allergic diseases. The rationale for its use is the correlation between an increased incidence of these conditions and reduced levels of exposure to parasites among people in developed countries. There is relatively little information about cross-species transmission of Trichuris spp. in animals. However, the eggs of T. trichiura have been detected in the feces of some pigs, dogs and cats in tropical areas with poor sanitation, raising the possibility of reverse zoonoses. One double-blind, placebo-controlled study investigated T. vulpis for therapeutic use in dogs with atopic dermatitis, but no significant effects were found. Etiology Trichuriasis is caused by members of the genus Trichuris, nematode parasites in the family Trichuridae. -
The Influence of Human Settlements on Gastrointestinal Helminths of Wild Monkey Populations in Their Natural Habitat
The influence of human settlements on gastrointestinal helminths of wild monkey populations in their natural habitat Zur Erlangung des akademischen Grades eines DOKTORS DER NATURWISSENSCHAFTEN (Dr. rer. nat.) Fakultät für Chemie und Biowissenschaften Karlsruher Institut für Technologie (KIT) – Universitätsbereich genehmigte DISSERTATION von Dipl. Biol. Alexandra Mücke geboren in Germersheim Dekan: Prof. Dr. Martin Bastmeyer Referent: Prof. Dr. Horst F. Taraschewski 1. Korreferent: Prof. Dr. Eckhard W. Heymann 2. Korreferent: Prof. Dr. Doris Wedlich Tag der mündlichen Prüfung: 16.12.2011 To Maya Index of Contents I Index of Contents Index of Tables ..............................................................................................III Index of Figures............................................................................................. IV Abstract .......................................................................................................... VI Zusammenfassung........................................................................................VII Introduction ......................................................................................................1 1.1 Why study primate parasites?...................................................................................2 1.2 Objectives of the study and thesis outline ................................................................4 Literature Review.............................................................................................7 2.1 Parasites