DOCSLIB.ORG

Identification and Distribution of Tick Species in Cattle in Eastern Bhutan

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

University of Calgary PRISM: University of Calgary's Digital Repository Graduate Studies The Vault: Electronic Theses and Dissertations 2020-11-04 Identification and Distribution of Tick Species in Cattle in Eastern Bhutan Namgyal, Jamyang Namgyal, J. (2020). Identification and Distribution of Tick Species in Cattle in Eastern Bhutan (Unpublished master's thesis). University of Calgary, Calgary, AB. http://hdl.handle.net/1880/112725 master thesis University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission. Downloaded from PRISM: https://prism.ucalgary.ca UNIVERSITY OF CALGARY Identification and Distribution of Tick Species in Cattle in Eastern Bhutan by Jamyang Namgyal A THESIS SUBMITTED TO THE FACULTY OF GRADUATE STUDIES IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF SCIENCE GRADUATE PROGRAM IN VETERINARY MEDICAL SCIENCES CALGARY, ALBERTA NOVEMBER, 2020 © Jamyang Namgyal 2020 Abstract Tick infestation is the most reported parasitological problem in cattle in Bhutan. Its negative impacts on the health and production of cattle affect the livelihoods of resource-poor subsistence farmers. However, the current knowledge of tick species diversity, infestation prevalence, geographic distribution, and farmers’ perception on tick prevention and control practices is limited. Therefore, the objectives of this research were to 1) determine the presence, diversity and infestation prevalence of tick species in cattle in two districts of eastern Bhutan using a targeted field survey; 2) model the habitat suitability of selected tick species identified in these two districts using the MaxEnt modeling approach; and 3) assess the knowledge, attitude, and practices (KAP) of ticks and tick-borne diseases (TBDs) among cattle farmers in a selected area of eastern Bhutan. In May and June 2019, 3600 live adult ticks were collected from 240 cattle and morphologically identified to the species level. In June 2019, 246 cattle owners were interviewed using a structured questionnaire. Four genera and six species of ticks were found. These were Rhipicephalus microplus (Canestrini) (70.2%), Rhipicephalus haemaphysaloides Supino (18.8%), Haemaphysalis bispinosa Neumann (8.2%), Haemaphysalis spinigera Neumann (2.5%), Amblyomma testudinarium Koch (n=7), and an unidentified species of Ixodes (n=1). For all tick species except A. testudinarium and Ixodes sp., the high altitude northeastern part and the low altitude southernmost part of the study area were predicted as areas with a very low probability of tick(s) presence. The KAP study identified only 52% of the farmers with adequate knowledge about ticks as vectors of diseases and 36% with a favorable attitude toward tick control programs. The findings from this research are expected to guide the planning and implementation of effective tick prevention and control measures in Bhutan. Keywords: ticks, cattle, habitat suitability modeling, MaxEnt, KAP, Bhutan ii Acknowledgments The past two years in the University of Calgary graduate program was a wonderful learning experience. Foremost, I would like to extend my gratitude to my supervisor, Dr. Susan Catherine Cork, for the opportunity to pursue my post-graduate master’s research program. Thank you for your exceptional guidance and support. I really do not know how I can justify the time and support you provided during this entire journey. I acknowledge the members of my supervisory committee, Dr. Tim J. Lysyk, Dr. Carl Ribble, and Dr. Sylvia Checkley, for their insights, commitment, guidance, and support during this entire program. This work would not have been possible without your guidance and feedback. I want to emphasize my deep gratitude to Dr. Susan Catherine Cork and Dr. Tim J. Lysyk for visiting Bhutan to guide me through my fieldwork. Your guidance and advice in research and entomology were invaluable to me. I thank Dr. Isabelle Couloigner for her passionate involvement, guidance, and support for my entire work. Your kindness and patience during our long sessions on modeling techniques were really amazing. And thank you for cheering me up when my learning curve was too steep. I would also like to thank Dr. Shaun Derguosoff, Research Scientist, Agriculture and Agri Food Canada for his valuable insights. Thank you, Shaun! I look forward to working with you in the future. I would like to express my gratitude to Dr. Sithar Dorjee, Director, Khesar Gyelpo University of Medical Sciences, Bhutan, for agreeing to be my mentor in Bhutan and for his support during my fieldwork in Bhutan. I would like to thank Dr. Ratna B Gurung, Program Director, National Centre for Animal Health (NCAH), Bhutan, and Dr. Tenzin, Veterinary iii Epidemiologist, NCAH, for their valuable insights, guidance and support while working on this project. I would like to thank Dr. Tashi Samdrup, former Director General, Department of Livestock (DoL), Ministry of Agriculture and Forests (MoAF), Dr. Karma Rinzin, former Chief Veterinary Officer, DoL, Dr. Tshering Dorjee, former Regional Director, RLDC, Kanglung, Dr. Kinzang Drukpa, former Program Director, NCAH, Dr. Kesang Wangchuk, Principal Research Officer, DoL, Dr. Narapati Dahal, and Dr. Karma Wangdi, Animal Health Division, DoL, Dr. Ugyen Namgyel, NCAH, Dr. Karma Phuntsho, Satellite Veterinary Laboratory, Nganglam, Pema Gatshel, and Mr. N S Tamang, District Livestock Officer, Trashigang for their support during my fieldwork in Bhutan. My special acknowledgment goes to my colleagues at Trashigang, Mr. Tashi Norbu, Mr. Phurba Wangdi, Mr. Kinley Tenzin, Mr. Lhatru, Mr. Rinzin Namgay, Mr. Jigme Choeda, Ms. Deki Jamtsho, Ms. Karma Wangmo and Mr. Kunzang Namgyal for their help in interviewing survey participants during my fieldwork. I also acknowledge the support of veterinary laboratory technicians, Mr. Lungten, Mr. Tenzinla, and Ms. Tshewang Dema during my fieldwork in Bhutan. Many thanks go to friends in Bhutan. Thank you, Ata Sangay Rinchen, for your guidance and support during my entire MSc journey. Ever since our BVSc & AH days in Pondicherry, India, you have been shouldering the role of an elder brother to me. I am forever indebted to you. Thank you, Ata Jigme Wangchuk, Thimphu, Aum Norbu Doelma, Chukha, and Ata Namgay Dorji, Program Director, NCA, Gelephu, for motivating me to navigate through the various challenges of my MSc journey. iv It was really wonderful time and experience, sharing time and office with graduate colleagues from different parts of the world (Mohammad Nazari, Karma Phuntsho, Fernando Guardado, Mai Farghaly, Paul Burden, Abraham Munene, Phil Rasmussen, Lindsay Rogers, Heather, Kelly, Alyssa, Kayla, Summer, Ana, Catalina, Shanas, and Sabrina). Thank you all for your warm friendship. I would like to acknowledge the Department of Ecosystem and Public Health administrative staff, Robert Forsyth and Joy Punsalan, for their help and support in all the administration related works. Thank you, Rob and Joy. I would like to acknowledge the journal clubs that have contributed to my learning. Thank you, Dr. Sylvia Checkley (One Health Journal Club), Dr. Karin Orsel (Epidemiology Journal Club), and Dr. David Hall (Livestock Policy Journal Club) for providing an interesting learning platform. I would like to thank the Royal Government of Bhutan for allowing me to pursue this master’s program. I also appreciate the One Health Graduate Training Award and the University International Grants that facilitated my research. Finally, I would like to thank my wife, Mrs. Tenzin Dema, and son Jamyang R Namgyal for letting me take this incredible journey. And a very special thanks to my parents, siblings, relatives, and friends for their support and encouragement. v Dedication This work is dedicated to my son Jamyang R Namgyal, the anchor of my life and the hero of my family. vi Table of Contents Abstract ....................................................................................................................................... ii Acknowledgments ....................................................................................................................... iii Dedication ................................................................................................................................... vi Table of Contents ....................................................................................................................... vii List of Tables ............................................................................................................................... x List of Figures ............................................................................................................................ xii List of Abbreviations ................................................................................................................. xiv Chapter 1 Introduction and literature review........................................................................... 1 1.1 Introduction and study objectives .............................................................................................. 1 1.2 Literature review ...................................................................................................................... 5 1.2.1 Classification of ticks ........................................................................................................
Recommended publications
  • The Predatory Mite (Acari, Parasitiformes: Mesostigmata (Gamasina); Acariformes: Prostigmata) Community in Strawberry Agrocenosis

    The Predatory Mite (Acari, Parasitiformes: Mesostigmata (Gamasina); Acariformes: Prostigmata) Community in Strawberry Agrocenosis

    Acta Universitatis Latviensis, Biology, 2004, Vol. 676, pp. 87–95 The predatory mite (Acari, Parasitiformes: Mesostigmata (Gamasina); Acariformes: Prostigmata) community in strawberry agrocenosis Valentîna Petrova*, Ineta Salmane, Zigrîda Çudare Institute of Biology, University of Latvia, Miera 3, Salaspils LV-2169, Latvia *Corresponding author, E-mail: [email protected]. Abstract Altogether 37 predatory mite species from 14 families (Parasitiformes and Acariformes) were collected using leaf sampling and pit-fall trapping in strawberry fi elds (1997 - 2001). Thirty- six were recorded on strawberries for the fi rst time in Latvia. Two species, Paragarmania mali (Oud.) (Aceosejidae) and Eugamasus crassitarsis (Hal.) (Parasitidae) were new for the fauna of Latvia. The most abundant predatory mite families (species) collected from strawberry leaves were Phytoseiidae (Amblyseius cucumeris Oud., A. aurescens A.-H., A. bicaudus Wainst., A. herbarius Wainst.) and Anystidae (Anystis baccarum L.); from pit-fall traps – Parasitidae (Poecilochirus necrophori Vitz. and Parasitus lunaris Berl.), Aceosejidae (Leioseius semiscissus Berl.) and Macrochelidae (Macrocheles glaber Müll). Key words: agrocenosis, diversity, predatory mites, strawberry. Introduction Predatory mites play an important ecological role in terrestrial ecosystems and they are increasingly being used in management for biocontrol of pest mites, thrips and nematodes (Easterbrook 1992; Wright, Chambers 1994; Croft et al. 1998; Cuthbertson et al. 2003). Many of these mites have a major infl uence on nutrient cycling, as they are predators on other arthropods (Santos 1985; Karg 1993; Koehler 1999). In total, investigations of mite fauna in Latvia were made by Grube (1859), who found 28 species, Eglītis (1954) – 50 species, Kuznetsov and Petrov (1984) – 85 species, Lapiņa (1988) – 207 species, and Salmane (2001) – 247 species.
  • Comparative Functional Morphology of Attachment Devices in Arachnida

    Comparative Functional Morphology of Attachment Devices in Arachnida

    Comparative functional morphology of attachment devices in Arachnida Vergleichende Funktionsmorphologie der Haftstrukturen bei Spinnentieren (Arthropoda: Arachnida) DISSERTATION zur Erlangung des akademischen Grades doctor rerum naturalium (Dr. rer. nat.) an der Mathematisch-Naturwissenschaftlichen Fakultät der Christian-Albrechts-Universität zu Kiel vorgelegt von Jonas Otto Wolff geboren am 20. September 1986 in Bergen auf Rügen Kiel, den 2. Juni 2015 Erster Gutachter: Prof. Stanislav N. Gorb _ Zweiter Gutachter: Dr. Dirk Brandis _ Tag der mündlichen Prüfung: 17. Juli 2015 _ Zum Druck genehmigt: 17. Juli 2015 _ gez. Prof. Dr. Wolfgang J. Duschl, Dekan Acknowledgements I owe Prof. Stanislav Gorb a great debt of gratitude. He taught me all skills to get a researcher and gave me all freedom to follow my ideas. I am very thankful for the opportunity to work in an active, fruitful and friendly research environment, with an interdisciplinary team and excellent laboratory equipment. I like to express my gratitude to Esther Appel, Joachim Oesert and Dr. Jan Michels for their kind and enthusiastic support on microscopy techniques. I thank Dr. Thomas Kleinteich and Dr. Jana Willkommen for their guidance on the µCt. For the fruitful discussions and numerous information on physical questions I like to thank Dr. Lars Heepe. I thank Dr. Clemens Schaber for his collaboration and great ideas on how to measure the adhesive forces of the tiny glue droplets of harvestmen. I thank Angela Veenendaal and Bettina Sattler for their kind help on administration issues. Especially I thank my students Ingo Grawe, Fabienne Frost, Marina Wirth and André Karstedt for their commitment and input of ideas.
  • (Batch Learning Self-Organizing Maps), to the Microbiome Analysis of Ticks

    (Batch Learning Self-Organizing Maps), to the Microbiome Analysis of Ticks

    Title A novel approach, based on BLSOMs (Batch Learning Self-Organizing Maps), to the microbiome analysis of ticks Nakao, Ryo; Abe, Takashi; Nijhof, Ard M; Yamamoto, Seigo; Jongejan, Frans; Ikemura, Toshimichi; Sugimoto, Author(s) Chihiro The ISME Journal, 7(5), 1003-1015 Citation https://doi.org/10.1038/ismej.2012.171 Issue Date 2013-03 Doc URL http://hdl.handle.net/2115/53167 Type article (author version) File Information ISME_Nakao.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP A novel approach, based on BLSOMs (Batch Learning Self-Organizing Maps), to the microbiome analysis of ticks Ryo Nakao1,a, Takashi Abe2,3,a, Ard M. Nijhof4, Seigo Yamamoto5, Frans Jongejan6,7, Toshimichi Ikemura2, Chihiro Sugimoto1 1Division of Collaboration and Education, Research Center for Zoonosis Control, Hokkaido University, Kita-20, Nishi-10, Kita-ku, Sapporo, Hokkaido 001-0020, Japan 2Nagahama Institute of Bio-Science and Technology, Nagahama, Shiga 526-0829, Japan 3Graduate School of Science & Technology, Niigata University, 8050, Igarashi 2-no-cho, Nishi- ku, Niigata 950-2181, Japan 4Institute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Königsweg 67, 14163 Berlin, Germany 5Miyazaki Prefectural Institute for Public Health and Environment, 2-3-2 Gakuen Kibanadai Nishi, Miyazaki 889-2155, Japan 6Utrecht Centre for Tick-borne Diseases (UCTD), Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands 7Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, 0110 Onderstepoort, South Africa aThese authors contributed equally to this work. Keywords: BLSOMs/emerging diseases/metagenomics/microbiomes/symbionts/ticks Running title: Tick microbiomes revealed by BLSOMs Subject category: Microbe-microbe and microbe-host interactions Abstract Ticks transmit a variety of viral, bacterial and protozoal pathogens, which are often zoonotic.
  • 'Advies Van Buro Over De Risico's Sierteeltketen

    'Advies Van Buro Over De Risico's Sierteeltketen

    Advies over de risico’s van de sierteeltketen Bijlagen 7 december 2020 TRCVWA/2020/6437 Advies over de risico’s van de sierteeltketen - TRCVWA/2020/6437 - Bijlagen Inhoudsopgave Bijlagen 1 Doel van de risicobeoordeling, definitie, focus en afbakening, beoordelingskader BuRO .......... 4 1.1 Doel .................................................................................................................... 4 1.2 Definitie, focus en afbakening ................................................................................. 4 1.3 Beoordelingskader ................................................................................................. 7 2 Beschrijving van de sierteeltketen ................................................................................... 9 2.1 Inleiding ............................................................................................................... 9 2.2 De sierteelt algemeen .......................................................................................... 11 2.3 De sierteelt in verwarmde kassen .......................................................................... 12 2.4 Teelt in de open lucht, koude kas of plastic tunnel ................................................... 16 3 Risicobeoordeling van voor planten schadelijke organismen: wetgeving, afbakening en methodiek ........................................................................................................................ 18 3.1 Inleiding ............................................................................................................
  • Community Structure of Mites (Acari: Acariformes and Parasitiformes) in Nests of the Semi-Collared Flycatcher (Ficedula Semitorquata) R

    Community Structure of Mites (Acari: Acariformes and Parasitiformes) in Nests of the Semi-Collared Flycatcher (Ficedula Semitorquata) R

    International Research Journal of Natural Sciences Vol.3, No.3, pp.48-53, December 2015 ___Published by European Centre for Research Training and Development UK (www.eajournals.org) COMMUNITY STRUCTURE OF MITES (ACARI: ACARIFORMES AND PARASITIFORMES) IN NESTS OF THE SEMI-COLLARED FLYCATCHER (FICEDULA SEMITORQUATA) R. Davidova, V. Vasilev, N. Ali, J. Bakalova Konstantin Preslavsky University of Shumen, 115, Universitetska Str., Shumen, 9700, Bulgaria. ABSTRACT: The aims of the present paper are to establish the specific structure of communities of prostigmatic and mesostigmatic mites in nests of the semi-collared flycatcher (Ficedula semitorquata) and to compare the fauna with the mites in nests of two other European flycatchers. For analysis of community structure of mites were used the indices: prevalence, relative density, mean intensity and dominance. Mite communities are strongly dominated by the species Dermanyssus gallinae and Ornithonyssus sylviarum, which were found with the highest frequency and dominance. The mite communities are characterized by a large number of subrecedent species. KEYWORDS: Acariformes, Parasitiformes, Nest of Bird, Community Structure INTRODUCTION The nests of different species of birds are an example of a fairly unstable and isolated habitat, with its own dependent on it specific fauna which involves different groups of invertebrate animals. One of the components of this fauna which demonstrates particular abundance is the arthropods, and more specifically, the mites. The studies of Parasitiformes show that mesostigmatic mites living in birds' nests vary both in terms of their species affiliation and the structure of their communities [4, 8]. Highly important with respect to veterinary science and medicine are a number of species, such as Ornithonyssus bursa, Ornithonyssus sylviarum, Dermanyssus gallinae harboured by birds, Ornithonyssus bacoti, harboured by rodents, etc.
  • An Investigation on First Outbreak of Kyasanur Forest Disease In

    An Investigation on First Outbreak of Kyasanur Forest Disease In

    Journal of Entomology and Zoology Studies 2015; 3(6): 239-240 E-ISSN: 2320-7078 P-ISSN: 2349-6800 An investigation on first outbreak of Kyasanur JEZS 2015; 3(6): 239-240 © 2015 JEZS forest disease in Wayanad district of Kerala Received: 18-09-2015 Accepted: 21-10-2015 Prakasan K Prakasan K Abstract Post Graduate and Research As a new challenge to health scenario of Kerala, an outbreak of Kyasanur Forest Disease was reported Dept. of Zoology Maharajas from Wayanad and Malappuram districts of Kerala, India from January to March 2015. A study on tick College Ernakulam Kerala- vectors of Wayanad district confirmed the presence of larval and nymphal Haemaphysalis spinigera, the 682011, India. chief vector of KFD in the forest pastures of Pulppally area. But in other sites viz Kalpetta and Mananthavady its prevalence was found to be low. Presence of tick species like Haemaphysalis bispinosa, Haemaphysalis spinigera, Amblyomma integrum. and Boophilus(Rhipicephalus) annulatus. was also noticed from the host animals surveyed. Keywords: Kyasanur Forest Disease, Ixodid ticks, Ectoparasite, Haemaphysalis Kyasanur Forest Disease (KFD) 1. Introduction Kyasanur Forest Disease (KFD), also referred to as monkey fever is an infectious bleeding disease in monkey and human caused by a highly pathogenic virus called KFD virus. It is an acute prostrating febrile illness, transmitted by infective ticks, especially, Haemaphysalis spinigera. Later KFD viruses also reported from sixteen other species of ticks. Rodents, Shrews, Monkeys and birds upon tick bite become reservoir for this virus. This disease was first reported from the Shimoga district of Karnataka, India in March 1955. Common targets of the virus among monkeys are langur (Semnopithecus entellus) and bonnet monkey (Macaca radiata).
  • Intraspecies Comparative Genomics of Rickettsia

    Intraspecies Comparative Genomics of Rickettsia

    AIX ͲMARSEILLE UNIVERSITÉ FACULTÉ DE MÉDECINE DE MARSEILLE ÉCOLE DOCTORALE DES SCIENCES DE LA VIE ET DE LA SANTÉ T H È S E Présentée et publiquement soutenue devant LA FACULTÉ DE MÉDECINE DE MARSEILLE Le 13 décembre 2013 Par M. Erwin SENTAUSA Né le 16 décembre 1979 àMalang, Indonésie INTRASPECIES COMPARATIVE GENOMICS OF RICKETTSIA Pour obtenir le grade de DOCTORAT d’AIX ͲMARSEILLE UNIVERSITÉ SPÉCIALITÉ :PATHOLOGIE HUMAINE Ͳ MALADIES INFECTIEUSES Membres du Jury de la Thèse : Dr. Patricia RENESTO Rapporteur Pr. Max MAURIN Rapporteur Dr. Florence FENOLLAR Membre du Jury Pr. Pierre ͲEdouard FOURNIER Directeur de thèse Unité de Recherche sur les Maladies Infectieuses et Tropicales Émergentes UM63, CNRS 7278, IRD 198, Inserm 1095 Avant Propos Le format de présentation de cette thèse correspond à une recommandation de la spécialité Maladies Infectieuses et Microbiologie, à l’intérieur du Master de Sciences de la Vie et de la Santé qui dépend de l’Ecole Doctorale des Sciences de la Vie de Marseille. Le candidat est amené àrespecter des règles qui lui sont imposées et qui comportent un format de thèse utilisé dans le Nord de l’Europe permettant un meilleur rangement que les thèses traditionnelles. Par ailleurs, la partie introduction et bibliographie est remplacée par une revue envoyée dans un journal afin de permettre une évaluation extérieure de la qualité de la revue et de permettre àl’étudiant de le commencer le plus tôt possible une bibliographie exhaustive sur le domaine de cette thèse. Par ailleurs, la thèse est présentée sur article publié, accepté ou soumis associé d’un bref commentaire donnant le sens général du travail.
  • Identification of Trombiculid Chigger Mites Collected on Rodents from Southern Vietnam and Molecular Detection of Rickettsiaceae Pathogen

    Identification of Trombiculid Chigger Mites Collected on Rodents from Southern Vietnam and Molecular Detection of Rickettsiaceae Pathogen

    ISSN (Print) 0023-4001 ISSN (Online) 1738-0006 Korean J Parasitol Vol. 58, No. 4: 445-450, August 2020 ▣ ORIGINAL ARTICLE https://doi.org/10.3347/kjp.2020.58.4.445 Identification of Trombiculid Chigger Mites Collected on Rodents from Southern Vietnam and Molecular Detection of Rickettsiaceae Pathogen 1, 2, 1 3 4,5, 4,5, Minh Doan Binh †, Sinh Cao Truong †, Dong Le Thanh , Loi Cao Ba , Nam Le Van * , Binh Do Nhu * 1Ho Chi Minh Institute of Malariology-Parasitology and Entomology, Ho Chi Minh Vietnam; 2Vinh Medical University, Nghe An, Vietnam; 3National Institute of Malariology-Parasitology and Entomology, Ha Noi, Vietnam; 4Military Hospital 103, Ha Noi, Vietnam; 5Vietnam Military Medical University, Ha Noi, Vietnam Abstract: Trombiculid “chigger” mites (Acari) are ectoparasites that feed blood on rodents and another animals. A cross- sectional survey was conducted in 7 ecosystems of southern Vietnam from 2015 to 2016. Chigger mites were identified with morphological characteristics and assayed by polymerase chain reaction for detection of rickettsiaceae. Overall chigger infestation among rodents was 23.38%. The chigger index among infested rodents was 19.37 and a mean abun- dance of 4.61. A total of 2,770 chigger mites were identified belonging to 6 species, 3 genera, and 1 family, and pooled into 141 pools (10-20 chiggers per pool). Two pools (1.4%) of the chiggers were positive for Orientia tsutsugamushi. Rick- etsia spp. was not detected in any pools of chiggers. Further studies are needed including a larger number and diverse hosts, and environmental factors to assess scrub typhus. Key words: Oriental tsutsugamushi, Rickettsia sp., chigger mite, ectoparasite INTRODUCTION Orientia tsutsugamushi is a gram-negative bacteria and caus- ative agent of scrub typhus, is a vector-borne zoonotic disease Trombiculid mites (Acari: Trombiculidae) are ectoparasites with the potential of causing life-threatening febrile infection that are found in grasses and herbaceous vegetation.
  • Artificial Feeding of All Consecutive Life Stages of Ixodes Ricinus

    Artificial Feeding of All Consecutive Life Stages of Ixodes Ricinus

    Article Artificial Feeding of All Consecutive Life Stages of Ixodes ricinus Nina Militzer 1, Alexander Bartel 2 , Peter-Henning Clausen 1, Peggy Hoffmann-Köhler 1 and Ard M. Nijhof 1,* 1 Institute of Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, 14163 Berlin, Germany; [email protected] (N.M.); [email protected] (P.-H.C.); [email protected] (P.H.-K.) 2 Institute for Veterinary Epidemiology and Biostatistics, Freie Universität Berlin, 14163 Berlin, Germany; [email protected] * Correspondence: [email protected]; Tel.: +49-30-838-62326 Abstract: The hard tick Ixodes ricinus is an obligate hematophagous arthropod and the main vector for several zoonotic diseases. The life cycle of this three-host tick species was completed for the first time in vitro by feeding all consecutive life stages using an artificial tick feeding system (ATFS) on heparinized bovine blood supplemented with glucose, adenosine triphosphate, and gentamicin. Relevant physiological parameters were compared to ticks fed on cattle (in vivo). All in vitro feedings lasted significantly longer and the mean engorgement weight of F0 adults and F1 larvae and nymphs was significantly lower compared to ticks fed in vivo. The proportions of engorged ticks were significantly lower for in vitro fed adults and nymphs as well, but higher for in vitro fed larvae. F1-females fed on blood supplemented with vitamin B had a higher detachment proportion and engorgement weight compared to F1-females fed on blood without vitamin B, suggesting that vitamin B supplementation is essential in the artificial feeding of I.
  • Chigger Mites (Acariformes: Trombiculidae) of Chiloé Island, Chile, with Descriptions of Two New Species and New Data on the Genus Herpetacarus

    Chigger Mites (Acariformes: Trombiculidae) of Chiloé Island, Chile, with Descriptions of Two New Species and New Data on the Genus Herpetacarus

    See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/346943842 Chigger Mites (Acariformes: Trombiculidae) of Chiloé Island, Chile, With Descriptions of Two New Species and New Data on the Genus Herpetacarus Article in Journal of Medical Entomology · December 2020 DOI: 10.1093/jme/tjaa258 CITATIONS READS 2 196 8 authors, including: Carolina Silva Alexandr A Stekolnikov Universidad Austral de Chile Russian Academy of Sciences 42 PUBLICATIONS 162 CITATIONS 98 PUBLICATIONS 666 CITATIONS SEE PROFILE SEE PROFILE Thomas Weitzel Esperanza Beltrami University of Desarrollo Universidad Austral de Chile 135 PUBLICATIONS 2,099 CITATIONS 12 PUBLICATIONS 18 CITATIONS SEE PROFILE SEE PROFILE Some of the authors of this publication are also working on these related projects: THE ROLE OF RODENTS IN THE DISTRIBUTION OF TRICHINELLA SP. IN CHILE View project Fleas as potential vectors of pathogenic bacteria: evaluating the effects of diversity and composition community of fleas and rodent on prevalence of Rickettsia spp. and Bartonella spp. in Chile View project All content following this page was uploaded by Esperanza Beltrami on 11 December 2020. The user has requested enhancement of the downloaded file. applyparastyle "fig//caption/p[1]" parastyle "FigCapt" applyparastyle "fig" parastyle "Figure" Journal of Medical Entomology, XX(X), 2020, 1–12 doi: 10.1093/jme/tjaa258 Morphology, Systematics, Evolution Research Chigger Mites (Acariformes: Trombiculidae) of Chiloé Island, Chile, With Descriptions of Two New Species and New Data on the Genus Herpetacarus Downloaded from https://academic.oup.com/jme/advance-article/doi/10.1093/jme/tjaa258/6020011 by guest on 11 December 2020 María Carolina Silva-de la Fuente,1 Alexandr A.
  • Interrupted Blood Feeding in Ticks: Causes and Consequences

    Interrupted Blood Feeding in Ticks: Causes and Consequences

    University of Rhode Island DigitalCommons@URI Plant Sciences and Entomology Faculty Publications Plant Sciences and Entomology 2020 Interrupted Blood Feeding in Ticks: Causes and Consequences Djamel Tahir Leon Meyer Josephus Fourie Frans Jongejan Thomas N. Mather University of Rhode Island, [email protected] See next page for additional authors Follow this and additional works at: https://digitalcommons.uri.edu/pls_facpubs Citation/Publisher Attribution Tahir, D.; Meyer, L.; Fourie, J.; Jongejan, F.; Mather, T.; Choumet, V.; Blagburn, B.; Straubinger, R.K.; Varloud, M. Interrupted Blood Feeding in Ticks: Causes and Consequences. Microorganisms 2020, 8, 910. Available at: https://doi.org/10.3390/microorganisms8060910 This Article is brought to you for free and open access by the Plant Sciences and Entomology at DigitalCommons@URI. It has been accepted for inclusion in Plant Sciences and Entomology Faculty Publications by an authorized administrator of DigitalCommons@URI. For more information, please contact [email protected]. Authors Djamel Tahir, Leon Meyer, Josephus Fourie, Frans Jongejan, Thomas N. Mather, Valérie Choumet, Byron Blagburn, Reinhard K. Straubinger, and Marie Varloud This article is available at DigitalCommons@URI: https://digitalcommons.uri.edu/pls_facpubs/36 Review Interrupted Blood Feeding in Ticks: Causes and Consequences Djamel Tahir 1, Leon Meyer 1, Josephus Fourie 2, Frans Jongejan 3, Thomas Mather 4, Valérie Choumet 5, Byron Blagburn 6, Reinhard K. Straubinger 7 and Marie Varloud 8,* 1 Clinvet Morocco,
  • Plant-Derived Natural Compounds for Tick Pest Control in Livestock and Wildlife: Pragmatism Or Utopia?

    Plant-Derived Natural Compounds for Tick Pest Control in Livestock and Wildlife: Pragmatism Or Utopia?

    insects Review Plant-Derived Natural Compounds for Tick Pest Control in Livestock and Wildlife: Pragmatism or Utopia? Danilo G. Quadros 1 , Tammi L. Johnson 2 , Travis R. Whitney 1, Jonathan D. Oliver 3 and Adela S. Oliva Chávez 4,* 1 Texas A&M AgriLife Research, San Angelo, TX 76901, USA; [email protected] (D.G.Q.); [email protected] (T.R.W.) 2 Department of Rangelands, Wildlife and Fisheries Management, Texas A&M AgriLife Research, Texas A&M University, Uvalde, TX 78801, USA; [email protected] 3 Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, MN 55455, USA; [email protected] 4 Department of Entomology, Texas A&M University, College Station, TX 77843, USA * Correspondence: [email protected]; Tel.: +1-979-845-1946 Received: 24 June 2020; Accepted: 29 July 2020; Published: 1 August 2020 Abstract: Ticks and tick-borne diseases are a significant economic hindrance for livestock production and a menace to public health. The expansion of tick populations into new areas, the occurrence of acaricide resistance to synthetic chemical treatments, the potentially toxic contamination of food supplies, and the difficulty of applying chemical control in wild-animal populations have created greater interest in developing new tick control alternatives. Plant compounds represent a promising avenue for the discovery of such alternatives. Several plant extracts and secondary metabolites have repellent and acaricidal effects. However, very little is known about their mode of action, and their commercialization is faced with multiple hurdles, from the determination of an adequate formulation to field validation and public availability.