DOCSLIB.ORG

Intestinal Protozoan Parasites in Northern India – Investigations on Transmission Routes

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Intestinal Protozoan Parasites in Northern India – Investigations on Transmission Routes Intestinal protozoan parasites in Northern India – investigations on transmission routes Philosophiae Doctor (PhD) Thesis Kjersti Selstad Utaaker Department of Food Safety and Infection Biology Faculty of Veterinary Medicine Norwegian University of Life Sciences Adamstuen (2017) Thesis number 2018:10 ISSN 1894-6402 ISBN 978-82-575-1750-2 1 2 To Jenny, Vilmer, Viljar and Ivo. “India can do it. People of India can do it.” – PM Modi on Swachh Bharat Abhiyan 3 4 Contents Acknowledgements ................................................................................................................................. 7 Abbreviations ........................................................................................................................................ 10 List of research papers .......................................................................................................................... 12 List of additional papers ........................................................................................................................ 14 Summary ............................................................................................................................................... 15 Sammendrag (Norwegian summary) .................................................................................................... 18 सारा車श (Hindi summary) ......................................................................................................................... 21 1. Introduction ................................................................................................................................... 24 1.1 Background .............................................................................................................................. 24 1.2 Giardia and Cryptosporidium in developing countries ............................................................ 25 1.3 General presentation of Cryptosporidium and Giardia .......................................................... 30 1.4 Giardia and Cryptosporidium as waterborne pathogens ........................................................ 46 1.5 Fresh produce as vehicles of infection for Giardia and Cryptosporidium ............................... 51 1.6 Domestic animals as potential sources of environmental contamination with Giardia and Cryptosporidium in the Indian context .......................................................................................... 58 1.7 Knowledge gaps ....................................................................................................................... 70 2. Aims of study ................................................................................................................................. 72 2.1 Main objectives ....................................................................................................................... 75 3. Summary of papers ....................................................................................................................... 77 4. Materials and Methods ................................................................................................................. 83 4.1 Diagnostic tools for environmental samples ........................................................................... 83 4.2 Diagnostic tools for detection of Cryptosporidium oocysts and Giardia cysts in faeces......... 88 4.3 Viability assessment methods ................................................................................................. 89 4.4 Material and methods used in this study ................................................................................ 93 4.5 Completion of sample processing at the Parasitology Lab at NMBU .................................... 103 4.6. Molecular methods .............................................................................................................. 108 5 4.7 Statistics ................................................................................................................................. 113 5. Results and general discussion .................................................................................................... 115 5.1 Experimental studies ............................................................................................................. 115 5.2 Survey studies ........................................................................................................................ 117 5.3 Limitations and challenges experienced in the study ........................................................... 126 6. Concluding remarks and future perspectives.............................................................................. 129 7. References ................................................................................................................................... 134 8. Compilation of papers…………………………………………………………………………………………..…………………161 6 Acknowledgements This present doctorate was carried out at the Department of Food Safety and Infection Biology at the Norwegian University of Life Sciences, Campus Adamstuen, and the Department of Medical Parasitology, at the Postgraduate Institute of Medical Education and Research, Chandigarh, India during the period of 2013 – 2017. It was financed by the Norwegian Research Council, project number 227965. Lucy J. Robertson, There sure were some marvellous moments. Thank you for all the support, from nicking blankets on the plane to India to proof-reading and making these studies come through. You have been a fantastic supervisor, role model, and mentor through the years of this thesis, and this work would never have seen the light of day without your enthusiasm and guidance. You are a person and professional I strive to be. Eystein Skjerve, for always being ready to help me with the statistics, and for your good advice and encouragement to turn every problem on the way into a challenge. Valeria Letkova, who supported me all the way through the writing of my in-depth study in parasitology during my Veterinary degree, and for her enthusiasm and encouragement which made me follow my dream to go into research. Ingrid and Arne Utaaker, my dear parents to whom I owe all my achievements. This thesis would never see light of day if it wasn`t for your continuous support. I deeply love and appreciate you. Camilla, Hedvig, Sveinung and Oscar-Torjus, my beloved siblings who I was lucky to grow up in the middle of. I would never be able to do my PhD without your continuous support, love and the friendship we have. Special thanks to Sveinung, who was always ready to help me with tables, statistics and outlay in some of the articles. Per Gunnar Karlsen, for being my mentor, colleague and support during my veterinary practice days both before and during my PhD, for showing a great interest in my research work and always inspiring me. 7 Bror Jonathan Myhren and Nina Myhr, for cheering me on from beginning till end of this work, sharing my concerns when results were absent, as well as celebrated the small victories along the way. You really have showed what true friendship is. Kristoffer Relling Tysnes, The support you have given me through my PhD years have been more than I can ever begin to elaborate. you are a great friend, researcher, mentor and person. Thanks for all the talks (and runs!) we`ve had over the years, and I look forward to our continuing scientific journeys ahead! NMBU labmates; Jemere Bekele Harito, Birgitte Kasin Hønsvall, John James Debenham, Teresa Hagen, Anna Barzcak, Hanne Landuyt, Sophie Kosters, Ane Holbø and Gabriel Gati, your enthusiasm, drive and skills have been a great inspiration to me. Thanks for always being ready to help and for the good advice, laughs and inspirations along the way. Dr. Rajinder Singh Bajwa, in my opinion, Indias finest Veterinarian. thanks for helping with the collection of samples, your good advice and willingness to cooperate. Veterinarians rock! Sandhya Khunger, Kirti Megha, Suman Chaudhary, and Harpreet Singh. We have danced, we have worked and we have laughed and cried through some amazing times together in India, and there is yet more to come. Paramvir Singh and Kavita, Thanks for the whisky, flying foxes and some crazy scooter-rides! Himanshu Joshi and Anil Kumar. We had some good times collecting the samples, thanks for all the help in both collection and logistics. PGIMER staff and labmates, you welcomed me as one of your own. Thanks for all the good times we have shared together! My hostel mates in Sector 11, for making the hostel stays so much more enjoyable. Thanks for invading my room when I thought I wanted to be alone. I believe and hope all your plans and dreams for this life comes true. Aman Khurana, your gym was my safe haven during my stays in Chandigarh! You are a great trainer and an even better person. 8 Mera bhedh, I`ll always hate you the least. 9 Abbreviations 18S rDNA: 18S ribosomal DNA AR: Attributable Risk. the portion of disease incidence in the exposed that is due to the exposure. cowp: Cryptosporidium oocyst wall protein. CPG: Number of Giardia cysts per gramme feces. DAPI: 4´, 6-diamino-2-phenylindole. DNA: Deoxyribonucleic acid. DAPI: 4′6 diamidino-2-phenylindole, a non-specific fluorescent stain that binds to double- stranded DNA. ELISA: Enzyme-linked immunosorbent assay. gdh: Glutamate dehydrogenase. GP60: 60kDa glycoprotein. IFAT: Indirect fluorescent antibody test. Immuno-magnetic separation (IMS): the separation of oocysts and cyst by para-magnetic
Load more

Recommended publications
  • Immunity Parasitic Infection
    BLUE BOX RULES ARE FOR PROOF STAGE ONLY. DELETE BEFORE FINAL PRINTING. Editor LAMB IMMUNITY TO PARASITIC INFECTION PARASITIC IMMUNITY TO INFECTION Editor TRACEY J LAMB, Emory University School of Medicine, USA Parasitic infections remain a significant cause of morbidity and mortality in the world today. Often endemic in developing countries, many parasitic diseases are neglected in terms of research IMMUNITY funding and much remains to be understood about parasites and the interactions they have with the immune system. This book examines current knowledge about immune responses to parasitic TO infections affecting humans, including interactions that occur during co-infections, and how immune responses may be manipulated to develop therapeutic interventions against parasitic infection. For easy reference, the most commonly studied parasites are examined in individual chapters written by investigators at the forefront of their field. An overview of the immune system, as well as introductions PARASITIC to protozoan and helminth parasites, is included to guide background reading. A historical perspective of the field of immunoparasitology acknowledges the contributions of investigators who have been instrumental in developing this field of research. INFECTION • Written by investigators at the forefront of the field • Includes a glossary of terms for easy reference • Illustrated in full-colour throughout • Features separate sections on co-infection, applied parasitology and the development of vaccines against parasitic infections This book will be invaluable to advanced undergraduates and masters students as well as PhD students who are beginning their graduate research project in an area of immunoparasitology. A companion website with additional resources Editor TRACEY J LAMB is available at www.wiley.com/go/lamb/immunity Cover design by Dan Jubb Immunity to Parasitic Infection Immunity to Parasitic Infection Edited by Tracey J.
    [Show full text]
  • The Stem Cell Revolution Revealing Protozoan Parasites' Secrets And
    Review The Stem Cell Revolution Revealing Protozoan Parasites’ Secrets and Paving the Way towards Vaccine Development Alena Pance The Wellcome Sanger Institute, Genome Campus, Hinxton Cambridgeshire CB10 1SA, UK; [email protected] Abstract: Protozoan infections are leading causes of morbidity and mortality in humans and some of the most important neglected diseases in the world. Despite relentless efforts devoted to vaccine and drug development, adequate tools to treat and prevent most of these diseases are still lacking. One of the greatest hurdles is the lack of understanding of host–parasite interactions. This gap in our knowledge comes from the fact that these parasites have complex life cycles, during which they infect a variety of specific cell types that are difficult to access or model in vitro. Even in those cases when host cells are readily available, these are generally terminally differentiated and difficult or impossible to manipulate genetically, which prevents assessing the role of human factors in these diseases. The advent of stem cell technology has opened exciting new possibilities to advance our knowledge in this field. The capacity to culture Embryonic Stem Cells, derive Induced Pluripotent Stem Cells from people and the development of protocols for differentiation into an ever-increasing variety of cell types and organoids, together with advances in genome editing, represent a huge resource to finally crack the mysteries protozoan parasites hold and unveil novel targets for prevention and treatment. Keywords: protozoan parasites; stem cells; induced pluripotent stem cells; organoids; vaccines; treatments Citation: Pance, A. The Stem Cell Revolution Revealing Protozoan 1. Introduction Parasites’ Secrets and Paving the Way towards Vaccine Development.
    [Show full text]
  • Protozoal-Related Mortalities in Endangered Hawaiian Monk Seals Neomonachus Schauinslandi
    Vol. 121: 85–95, 2016 DISEASES OF AQUATIC ORGANISMS Published September 26 doi: 10.3354/dao03047 Dis Aquat Org Protozoal-related mortalities in endangered Hawaiian monk seals Neomonachus schauinslandi Michelle M. Barbieri1,*, Lizabeth Kashinsky2, David S. Rotstein3, Kathleen M. Colegrove4, Katherine H. Haman5,6,7, Spencer L. Magargal7, Amy R. Sweeny7, Angela C. Kaufman2, Michael E. Grigg7, Charles L. Littnan1 1National Oceanic and Atmospheric Administration, Pacific Islands Fisheries Science Center, Protected Species Division, Hawaiian Monk Seal Research Program, Honolulu, HI 96818, USA 2Joint Institute for Marine and Atmospheric Research, University of Hawai’i at Ma¯ noa, 1000 Pope Road, Marine Sciences Building 312, Honolulu, HI 96822 USA 3Marine Mammal Pathology Services, Olney, MD 20832, USA 4Zoological Pathology Program, College of Veterinary Medicine, University of Illinois at Urbana-Champaign, Brookfield, IL 60513, USA 5Health and Genetics Program, Washington Department of Fish and Wildlife, Olympia, WA 98501, USA 6Marine Mammal Research Unit, Institute for the Oceans and Fisheries, University of British Columbia, Vancouver, V6T 1Z4, BC, Canada 7Molecular Parasitology Section, Laboratory of Parasitic Diseases, NIAID, National Institutes of Health, Bethesda, MD 20892, USA ABSTRACT: Protozoal infections have been widely documented in marine mammals and may cause morbidity and mortality at levels that result in population level effects. The presence and potential impact on the recovery of endangered Hawaiian monk seals Neomonachus schauins- landi by protozoal pathogens was first identified in the carcass of a stranded adult male with dis- seminated toxoplasmosis and a captive monk seal with hepatitis. We report 7 additional cases and 2 suspect cases of protozoal-related mortality in Hawaiian monk seals between 2001 and 2015, including the first record of vertical transmission in this species.
    [Show full text]
  • Predominance of Blastocystis Sp. Infection Among School Children in Peninsular Malaysia
    RESEARCH ARTICLE Predominance of Blastocystis sp. Infection among School Children in Peninsular Malaysia Kalimuthu Nithyamathi1, Samudi Chandramathi2, Suresh Kumar1* 1 Department of Parasitology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia, 2 Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia * [email protected] a11111 Abstract Background One of the largest cross-sectional study in recent years was carried out to investigate the prevalence of intestinal parasitic infections among urban and rural school children from five OPEN ACCESS states namely Selangor, Perak, Pahang, Kedah and Johor in Peninsula Malaysia. This Citation: Nithyamathi K, Chandramathi S, Kumar S information would be vital for school authorities to influence strategies for providing better (2016) Predominance of Blastocystis sp. Infection health especially in terms of reducing intestinal parasitism. among School Children in Peninsular Malaysia. PLoS ONE 11(2): e0136709. doi:10.1371/journal. pone.0136709 Methods and Principal Findings Editor: Henk D. F. H. Schallig, Royal Tropical A total of 3776 stool cups was distributed to 26 schools throughout the country. 1760 Institute, NETHERLANDS (46.61%) responded. The overall prevalence of intestinal parasitic infection in both rural and Received: August 12, 2014 urban areas was 13.3%, with Blastocystis sp (10.6%) being the most predominant, followed Accepted: August 8, 2015 by Trichuris trichiura (3.4%), Ascaris lumbricoides (1.5%) and hook worm infection (0.9%). Published: February 25, 2016 Only rural school children had helminthic infection. In general Perak had the highest infec- tion (37.2%, total, n = 317), followed by Selangor (10.4%, total, n = 729), Pahang (8.6%, Copyright: © 2016 Nithyamathi et al.
    [Show full text]
  • Prevalence of Intestinal Protozoan Infection Among Patients in Hawassa City Administration Millennium Health Center, Ethiopia
    Journal of Applied Biotechnology & Bioengineering Research Article Open Access Prevalence of intestinal protozoan infection among patients in Hawassa city administration millennium health center, Ethiopia Abstract Volume 5 Issue 4 - 2018 Current retrospective study was carried out from April to May, 2009 E.C. to determine the prevalence of intestinal protozoan parasitic infection in Hawassa city administration Beyene Dobo millennium health center from 2004-2008 E.C. From the study, a total of 89423 peoples of Hawassa University, Ethiopia both males and females were examined for various intestinal protozoan parasitic infection test. From these 39895(44.61%) were positive to intestinal protozoan parasitic infection. Correspondence: Beyene Dobo, Hawassa University, College The study shows that, Entamoeba histolytica and Giardia lambila were the most common of Natural and Computational Sciences, P.O.Box: 05, Hawassa, Ethiopia, Email [email protected] intestinal protozoan parasitic infections among patients. Between these, Entamoeba histolytica was highly prevalent (57.53%) and Giardia lambila was the next prevalent Received: March 30, 2018 | Published: July 17, 2018 (42.47%) intestinal protozoan parasitic infections. With over all age association the most infected age groups were less than 10 years old (22.98%) and the least affected age groups were greater than 50 years old peoples (16.75%). And the most infected sex groups were males (50.98%) and the less infected sex groups were females (49.02%). According to the current study the infection of intestinal protozoan such as: Entamoeba histolytica/dispar and Giardia lambila were highly distributed in Hawassa city administration millennium health center. So, to minimize or inhibit the spread and impact of its infection all community members should get awareness for proportion of personal and environmental hygiene and this should be the responsibility of all individuals.
    [Show full text]
  • Infection Toxoplasma Gondii Susceptibility During Neutrophil
    CXCR2 Deficiency Confers Impaired Neutrophil Recruitment and Increased Susceptibility During Toxoplasma gondii Infection This information is current as of September 24, 2021. Laura Del Rio, Soumaya Bennouna, Jesus Salinas and Eric Y. Denkers J Immunol 2001; 167:6503-6509; ; doi: 10.4049/jimmunol.167.11.6503 http://www.jimmunol.org/content/167/11/6503 Downloaded from References This article cites 56 articles, 36 of which you can access for free at: http://www.jimmunol.org/content/167/11/6503.full#ref-list-1 http://www.jimmunol.org/ Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision • No Triage! Every submission reviewed by practicing scientists • Fast Publication! 4 weeks from acceptance to publication by guest on September 24, 2021 *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2001 by The American Association of Immunologists All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. CXCR2 Deficiency Confers Impaired Neutrophil Recruitment and Increased Susceptibility During Toxoplasma gondii Infection1 Laura Del Rio,† Soumaya Bennouna,* Jesus Salinas,† and Eric Y. Denkers*2 Neutrophil migration to the site of infection is a critical early step in host immunity to microbial pathogens, in which chemokines and their receptors play an important role.
    [Show full text]
  • Intestinal Amebiasis: Diagnosis and Management
    REVIEW ARTICLE Intestinal Amebiasis: Diagnosis and Management Nully Juariah M*, Murdani Abdullah **, Inge Sutanto***, Khie Chen****, Vera Yuwono***** *Department of Internal Medicine, Faculty of Medicine, University of Indonesia/Dr. Cipto Mangunkusumo General National Hospital **Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine University of Indonesia/Dr. Cipto Mangunkusumo General National Hospital ***Department of Parasitology, Faculty of Medicine, University of Indonesia/Dr. Cipto Mangunkusumo General National Hospital ****Division of Tropical Medicine and Infectious Diseases, Department of Internal Medicine, Faculty of Medicine, University of Indonesia/Dr. Cipto Mangunkusumo General National Hospital *****Department of Anatomical Pathology, Faculty of Medicine, University of Indonesia/Dr. Cipto Mangunkusumo General National Hospital ABSTRACT Intestinal amebiasis is an infection due to Entamoeba Histolytica and has the highest prevalence in tropical countries, including Indonesia. Amebiasis is responsible for approximately 70,000 deaths annually every year. High prevalence is found especially in endemic area which had poor hygiene and sanitation or crowded population. Human is the main reservoir, while the disease can be transmited by mechanical vector such as cokckroach and flies. Making diagnosis of intestinal amebiasis sometimes can be a problem. Clinical presentation and disease severity may be varied. Complication due to late management of the disease can be fatal. Lifestyle education, early diagnosis
    [Show full text]
  • The Lysis of Trypanosoma Brucei Brucei by Hun1an Serun1
    © 1996 Nature Publishing Group http://www.nature.com/naturebiotechnology • REVIEW ARTICLE The lysis of Trypanosoma brucei brucei by hun1an serun1 Stephen Tomlinson* and Jayne Raper1 Departments of Pathology and 'Medical and Molecular Parasitology, NYU Medical Center, New York, NY 10016. *Corresponding author ( e-mail: [email protected]). Received 25 January 1996; accepted 4 April 1996. The natural immunity of humans to the cattle pathogen Trypanosoma brucei brucei, but not to the morphologically indistiguishable human pathogens T. brucei gambiense and T. brucei rhodesiense, is due to the selective killing of the parasite by normal human serum. The factor in human serum that mediates lysis of T. brucei brucei has long been attributed to a minor subclass of high density lipopro­ tein (HDL). Evidence indicates that the trypanolytic activity of isolated human HDL is due to peroxidase activity of an associated haptoglobin-related protein-hemoglobin complex. However, recent data sug­ gest that the trypanolytic activity of HDL may be completely inhibited in whole human serum, and that trypanolytic activity of norman human serum is due to a second, less well-defined factor of high molec­ ular weight. Current research aimed at understanding the mechamisms of cytotoxicity and the affected metabolic pathways may open new approaches for the development of specific drugs and vaccines against trypanosomiasis. Keywords: Trypanosoma, high density lipoprotein, haptoglobin, serum lysis African trypanosomes and disease An intriguing phenomenon associated with natural immunity Trypanosomiasis is a major health and economic problem in to these parasites is the complement-independent selective killing Africa. The affected areas extend over more than 10 million km2 by normal human serum (NHS) of the cattle pathogen T.
    [Show full text]
  • Prevalence of and Risk Factors for Malaria, Filariasis, and Intestinal
    M’bondoukwé et al. Infectious Diseases of Poverty (2018) 7:6 DOI 10.1186/s40249-017-0381-4 RESEARCHARTICLE Open Access Prevalence of and risk factors for malaria, filariasis, and intestinal parasites as single infections or co-infections in different settlements of Gabon, Central Africa Noé Patrick M’bondoukwé1, Eric Kendjo1, Denise Patricia Mawili-Mboumba1, Jeanne Vanessa Koumba Lengongo1, Christelle Offouga Mbouoronde1, Dieudonné Nkoghe2, Fousseyni Touré2 and Marielle Karine Bouyou-Akotet1* Abstract Background: Malaria, filariasis, and intestinal parasitic infections (IPIs) are common and frequently overlap in developing countries.Theprevalenceandpredictorsoftheseinfections were investigated in three different settlements (rural, semi-urban, and urban) of Gabon. Methods: During cross-sectional surveys performed from September 2013 to June 2014, 451 individuals were interviewed. In addition, blood and stool samples were analysed for the presence of Plasmodium, filarial roundworm, intestinal protozoan, and helminth infections. Results: Intestinal parasitic infections (61.1%), including intestinal protozoa (56.7%) and soil-transmitted helminths (STHs) (22.2%), predominated, whereas Plasmodium falciparum (18.8%), Loa loa (4.7%), and Mansonella perstans (1.1%) were less prevalent. Filariasis and STHs were mainly found in rural settlements, whereas a higher plasmodial infection prevalence rate was observed in the periurban area. The most common IPI was blastocystosis (48.6%), followed by ascaridiasis (13.7%), trichuriasis (11.8%), amoebiasis (9.3%), giardiasis (4.8%), and strongyloidiasis (3.7%). Hookworm was detected in one adult from rural Dienga. Adults had a higher prevalence of Blastocystis hominis and STHs, whereas Giardia duodenalis was more frequently observed among children aged below 5 years (P < 0.01). The polyparasitism rate was 41.5%, with 7.0% Plasmodium-IPIs and 1.8% Plasmodium-STH co-infections.
    [Show full text]
  • Opportunistic Protozoan Infections in Human
    182 J Clin Pathol 1991;44:182-193 Opportunistic protozoan infections in human immunodeficiency virus disease: Review J Clin Pathol: first published as 10.1136/jcp.44.3.182 on 1 March 1991. Downloaded from highlighting diagnostic and therapeutic aspects A Curry, A J Turner, S Lucas Introduction AIDS. The AIDS epidemic has considerably Opportunistic protozoan infections are among increased our awareness of this organism, the most serious infections in patients with which is now known to be a common child- AIDS."A They cause severe morbidity and hood infection among the immunocompetent mortality; because many are treatable, it is in whom the infection is self-limiting.8 In important that early and accurate diagnoses patients with AIDS and in other immuno- are made. This is normally accomplished by compromised groups infection can be both direct microscopic visualisation of the parasite protracted and life threatening. It has a par- in infected tissues or body secretions. Rigid ticularly high incidence in HIV positive adherence to normal diagnostic procedures patients with diarrhoea in Africa" and it is may not be appropriate in patients with AIDS found in up to 10% of most series of HIV because the site and manifestation of some of positive patients with diarrhoea in the United these infections may be unusual. Experience Kingdom and the United States of America. of these conditions among histopathologists The gastrointestinal tract from oesophagus to and microbiologists is extremely variable. rectum, the biliary tract including intra- Furthermore, treatment of the protozoan hepatic ducts, and the bronchial tree can be infections in patients with AIDS is often com- infected in patients with AIDS.'2"3 Infection plicated by severe side effects and a high rate is caused by the ingestion of oocysts in food or of recurrence.
    [Show full text]
  • Literature Analysis of Blastocystis Sp. from 1990 to 2019 in China
    Literature Analysis of Blastocystis sp. from 1990 to 2019 in China Chao-qun Ning Chinese Center for Disease Control and Prevention Lin Ai Chinese Center for Disease Control and Prevention Li-Guang Tian ( [email protected] ) Centers for Disease Control and Prevention https://orcid.org/0000-0003-0817-6943 Research Article Keywords: Blastocystis sp.; literature analysis; China Posted Date: May 13th, 2020 DOI: https://doi.org/10.21203/rs.3.rs-26013/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Version of Record: A version of this preprint was published on December 30th, 2020. See the published version at https://doi.org/10.1186/s40249-020-00779-z. Page 1/32 Abstract Background Blastocystis sp. is ubiquitous presence in animals and humans worldwide and a broad diversity genetically. The aim of this study was to nd out the main research progress and research status of Blastocystis sp. in China in the past thirty years. Methods On the Chinese mainstream database China National Knowledge Infrastructure (CNKI), Wanfang database and PubMed database, the research literatures of Chinese Blastocystis sp. were searched and analyzed. Results 285 articles related to Blastocystis sp. were retrieved, including 244 published in Chinese and 41 English on pathogen morphology, epidemiological investigation, laboratory detection and diagnosis, clinical case reports, drug treatment, animal model establishment as well as pathogenicity studies. There were the most epidemiological investigations and researches on pathogenic morphology decreasing recently Surveys of Blastocystis sp. of human has been carried out among a total of 18 provinces, with infection rates ranging from 0.007–48.6%.
    [Show full text]
  • Molecular Identification of Vermamoeba Vermiformis from Freshwater Fish in Lake Taal, Philippines
    Experimental Parasitology 183 (2017) 201e206 Contents lists available at ScienceDirect Experimental Parasitology journal homepage: www.elsevier.com/locate/yexpr Molecular identification of Vermamoeba vermiformis from freshwater fish in lake Taal, Philippines * Giovanni D. Milanez a, , Frederick R. Masangkay a, Rey C. Thomas b, Ma Olive Grace O. Ordona a, Gabriel Q. Bernales a, Vyana Camille M. Corpuz a, Hannah Selina V. Fortes a, Charezze Margarette S. Garcia a, Lara Camille Nicolas a, Veeranoot Nissapatorn c a Department of Medical Technology, Far Eastern University, Manila, Philippines b Department of Biology, Far Eastern University, Manila, Philippines c School of Allied Health Sciences (Southeast Asia Water Team), Walailak University, Nakhon Si Thammarat, Thailand highlights graphical abstract Free-Living Amoebas were isolated from Freshwater fishes from Lake Taal, Philippines. Molecular identification and phylo- genetic analysis of FLAs and Verma- moeba sp. from fresh water fish. Vermamoeba vermiformis was isolated from the gut of a freshwater fish Oreochromis niloticus tilapia. Oreochromis niloticus tilapia fish gut microbiome. article info abstract Article history: Free Living Amoebae (FLA) are considered ubiquitous. FLAs may infect various biological organisms Received 20 July 2017 which act as reservoir hosts. Infected freshwater fishes can pose a public health concern due to possible Received in revised form human consumption. This study aims to identify possible pathogenic FLAs present in freshwater fishes. 6 September 2017 Seventy five (75) Oreochromis niloticus were studied for the presence of FLAs. Fish organs were sus- Accepted 11 September 2017 pended in physiologic saline pelleted and cultured in non-nutrient agar (NNA) lawned with Escherichia Available online 13 September 2017 coli and were incubated in 33 C for 14 days.
    [Show full text]