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Author: Daniel E. Sonenshine
Publisher: Oxford University Press, USA
ISBN: 0195073134
Category : Medical
Languages : en
Pages : 464
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Book Description
The ecological relationships found to exist between tick vectors and pathogens in their zootic cycle can profoundly influence patterns of transmission and disease for humans and domestic animals. This book examines the ecological parameters affecting the conservation and regulation of tick-borne zoonoses as well as the geographic and seasonal distributions of those infections. Written by an eminent authority on the subject, the book will be sought after by students and researchers in ecology, invertebrate zoology, parasitology, entomology, public health, and epidemiology.
Author: Daniel E. Sonenshine
Publisher: Oxford University Press, USA
ISBN: 0195073134
Category : Medical
Languages : en
Pages : 464
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Book Description
The ecological relationships found to exist between tick vectors and pathogens in their zootic cycle can profoundly influence patterns of transmission and disease for humans and domestic animals. This book examines the ecological parameters affecting the conservation and regulation of tick-borne zoonoses as well as the geographic and seasonal distributions of those infections. Written by an eminent authority on the subject, the book will be sought after by students and researchers in ecology, invertebrate zoology, parasitology, entomology, public health, and epidemiology.
Author: Daniel E. Sonenshine
Publisher: Oxford University Press
ISBN: 0195360923
Category : Science
Languages : en
Pages : 464
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Book Description
The ecological relationships found to exist between tick vectors and pathogens in their zootic cycle can profoundly influence patterns of transmission and disease for humans and domestic animals. This book examines the ecological parameters affecting the conservation and regulation of tick-borne zoonoses as well as the geographic and seasonal distributions of those infections. Written by an eminent authority on the subject, the book will be sought after by students and researchers in ecology, invertebrate zoology, parasitology, entomology, public health, and epidemiology.
Author: Scott Larson
Publisher:
ISBN:
Category :
Languages : en
Pages : 113
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Book Description
Ticks and tick-borne diseases are a major concern in the US. Ixodes scapularis (Say) is the vector of multiple bacteria, protists, and viruses that cause human illness, including Lyme disease. While the ecological dynamics of the Lyme disease system have been well-studied in eastern oak forests, much less is known about the drivers and stability of patterns in other forest types and other regions of the United States. Wisconsin is a hotspot for Lyme disease and many emerging tick-borne pathogens. Eighty-eight sites in five maple-dominated forests were characterized by measuring the abundance of ticks and the prevalence of two common pathogens, Borrelia burgdorferi sensu stricto and Anaplasma phagocytophilum, in tick and small mammal hosts over three consecutive years. To identify biotic and abiotic factors that influenced the abundance of ticks and pathogens at both the forest and microgeographic scales, I collected data on the density of host-seeking ticks, the average number of ticks attached to small mammals, the abundance and types of small mammals, and the prevalence of infection at each site. In addition, remotely sensed and field-gathered data were collected, including: soil characteristics, vascular plant community characteristics, camera-trap records of medium and large mammals, earthworm activity, light intensity, and landscape parameters. Questing and on-host tick abundance varied considerably by year and forest. However, relative tick abundance was remarkably consistent across these northern Wisconsin forests. Two species of mice are common to northern Wisconsin forests, Peromyscus leucopus and P. maniculatus. Nearly all prior studies have focused on P. leucopus. I found that these two species play important yet different roles in the transmission and maintenance of tick-borne pathogens. The prevalence of B. burgdorferi was higher in P. leucopus than in P. maniculatus, whereas P. maniculatus was more commonly infected with the pathogen that causes human anaplasmosis. Interestingly, P. leucopus was always found to host more immature I. scapularis ticks than P. maniculatus regardless of forest or year. In summary, my research suggests that mouse species identity and microhabitat characteristics strongly influence the abundance of I. scapularis nymphs, pathogen prevalence, and human risk for tick-borne diseases in northern Wisconsin forests.
Author: Agustín Estrada-Peña
Publisher: Frontiers Media SA
ISBN: 288919406X
Category : Infectious and parasitic diseases
Languages : en
Pages : 180
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Book Description
Ticks are noticeable by the high diversity of pathogens they can transmit, most of them with implications in human and animal health. Ticks are arachnids, meaning that they do not share the biological and ecological features of the mosquitoes and other parasitic Diptera. The natural foci of tick-borne pathogens may be as large as a continent, or be restricted to small portions of a country, without apparently too many similar features. The life cycle of the ticks involved three developing instars. The precise relationships of ticks and their hosts, the specific seasonal pattern of activity of ticks, and the still poorly known molecular relationships between ticks and the pathogens they can transmit, make these vectors a specially fecund field of research. Importantly, extensive studies on the biological and ecological relationships of ticks and abiotic (climate and vegetation) conditions have revealed the fine-tuning of the ticks and the pathogens they transmit, together with the biological effects of host and the driving features by the climate. The studies on tick-transmitted pathogens have been on the rise in the last years. There is a growing interest in understand the somewhat complex relationships between the landscape, the climate, the vectors and the pathogens, because the concerns of spread, probably driven by subtle changes in climate and man made alterations of the landscape. Studies on Lyme borreliosis are addressing the interesting issue of the relationships between the climate, the tick activity patterns, and the selection of strains according to the reservoir availability. Furthermore, the expanding field of habitat suitability modeling has been applied with different degrees of success to evaluate and quantify the risk of disease transmission. In such exponentially growing field, revisionary books are clearly welcome additions to the bibliographical tools of researchers. It is however necessary the compilation of works devoted to explore the tip of the iceberg in the field of research. In this Research Topic, we wish to summarize and review the studies on ecology, molecular biology, and tick-host-pathogens interactions, provided to resolve the important issues of ticks and pathogens. We want not only the results obtained by newly developed molecular tools, but rigorous reviews of the most recent advances in these issues. This Topic will cover aspects of both human and animal health, with special interest on zoonoses. Aspects of the biology of the ticks, as affecting the transmission of pathogens, are of special interest in this Topic. Studies on ticks of the poorly known family Argasidae, as related to their involvement on pathogen transmission, are especially welcome. We also wish to describe the perspective of the field in the future. Finally, the presentation of ongoing original works is greatly encouraged.
Author: Pat Nuttall
Publisher: CABI
ISBN: 1789249635
Category : Medical
Languages : en
Pages : 589
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Book Description
This book brings together expert opinions from scientists to consider the evidence for climate change and its impacts on ticks and tick-borne infections. It considers what is meant by 'climate change', how effective climate models are in relation to ecosystems, and provides predictions for changes in climate at global, regional and local scales relevant for ticks and tick-borne infections. It examines changes to tick distribution and the evidence that climate change is responsible. The effect of climate on the physiology and behaviour of ticks is stressed, including potentially critical impacts on the tick microbiome. Given that the notoriety of ticks derives from pathogens they transmit, the book considers whether changes in climate affect vector capacity. Ticks transmit a remarkable range of micro- and macro-parasites many of which are pathogens of humans and domesticated animals. The intimacy between a tick-borne agent and a tick vector means that any impacts of climate on a tick vector will impact tick-borne pathogens. Most obviously, such impacts will be apparent as changes in disease incidence and prevalence. The evidence that climate change is affecting diseases caused by tick-borne pathogens is considered, along with the potential to make robust predictions of future events.
Author: Jianhong Wu
Publisher: Springer Nature
ISBN: 3030540243
Category : Mathematics
Languages : en
Pages : 160
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Book Description
This monograph introduces some current developments in the modelling of the spread of tick-borne diseases. Effective modelling requires the integration of multiple frameworks. Here, particular attention is given to the previously neglected issues of tick developmental and behavioral diapause, tick-borne pathogen co-feeding transmission, and their interactions. An introduction to the required basics of structured population formulations and delay differential equations is given, and topics for future study are suggested. The described techniques will also be useful in the study of other vector-borne diseases. The ultimate aim of this project is to develop a general qualitative framework leading to tick-borne disease risk predictive tools and a decision support system. The target audience is mathematical biologists interested in modelling tick population dynamics and tick-borne disease transmission, and developing computational tools for disease prevention and control.
Author: John M. Drake
Publisher: Oxford University Press
ISBN: 0192594648
Category : Science
Languages : en
Pages : 304
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Book Description
Population Biology of Vector-Borne Diseases is the first comprehensive survey of this rapidly developing field. The chapter topics provide an up-to-date presentation of classical concepts, reviews of emerging trends, synthesis of existing knowledge, and a prospective agenda for future research. The contributions offer authoritative and international perspectives from leading thinkers in the field. The dynamics of vector-borne diseases are far more intrinsically ecological compared with their directly transmitted equivalents. The environmental dependence of ectotherm vectors means that vector-borne pathogens are acutely sensitive to changing environmental conditions. Although perennially important vector-borne diseases such as malaria and dengue have deeply informed our understanding of vector-borne diseases, recent emerging viruses such as West Nile virus, Chikungunya virus, and Zika virus have generated new scientific questions and practical problems. The study of vector-borne disease has been a particularly rich source of ecological questions, while ecological theory has provided the conceptual tools for thinking about their evolution, transmission, and spatial extent. Population Biology of Vector-Borne Diseases is an advanced textbook suitable for graduate level students taking courses in vector biology, population ecology, evolutionary ecology, disease ecology, medical entomology, viral ecology/evolution, and parasitology, as well as providing a key reference for researchers across these fields.
Author: Thérese Janzén
Publisher:
ISBN: 9789189504707
Category :
Languages : en
Pages : 0
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Book Description
Ticks and tick-borne diseases are ranking second only to mosquitoes as vectors of pathogens responsible for diseases in both humans and domestic animals. In the countries around the Baltic Sea, two medically important tick species are increasing both in range and abundance, and the public health threat posed by tick-borne diseases in this area is steadily growing. The aim of this thesis was to study the eco-epidemiological dynamics and mechanisms of ticks and bacterial tick-borne pathogens along the natural-urban gradient.??Green spaces have become important intersections between humans, domestic animals, ticks, and tick-borne pathogens. Along the natural-urban gradient in Stockholm County, Sweden, we examined the impact of green space characteristics on tickabundance and pathogens prevalence. In this study all questing ticks were molecularly identified as Ixodes ricinus. Questing ticks were abundant in natural and seminatural habitats, but also present in urbanized parks. Important drivers of tickabundance included significant negative effects of local vegetation height and positiveeffects of mixed coniferous forests in the surrounding landscape.??The prevalence of Borrelia burgdorferi sensu lato was 24% and that of Anaplasma phagocytophilum 7.5%. B. miyamotoi was found at a few sites with a prevalence of 0.9%. The dominant B. burgdorferi (s.l.) genospecies was B. afzelii. Tree stem density had a significant positive effect on B. burgdorferi (s.l.) prevalence. Broadleaved forests and total forest edge had significant positive effects on A. phagocytophilum prevalence, persisting even in highly urbanized areas. The tick-borne disease equine granulocytic anaplasmosis (EGA) significant increased from 2002 to 2015, with a yearly peak in late summer and early fall.??The public health risk for tick-borne diseases in an urban green space was estimated from hazard data on tick abundances and pathogen prevalence combined with exposure data using residential population densities and green space visitor numbers. The results indicated a medium to high risk of tick-borne diseases at most sites. Structured interviews with visitors showed that even if visitors showed a high tick awareness and attempted to avoid ticks, most protective measures were only practiced during specific recreational activities.??The findings from this doctoral project show a notable risk of encountering ticks and tick-borne pathogens along the entire natural-urban gradient, even in highly urbanized areas traditionally perceived as having a low risk. The information on the eco-epidemiological drivers of EGA is important also for the medical health field since the agent causing EGA is identical to the agent causing human disease. Despite ticks and their pathogens green spaces still continue to play a vital role in public health, but the omnipresent risk of tick-borne diseases highlights the need for public health initiatives to mitigate this risk.
Author: Mowafak Dauod Salman
Publisher: CABI
ISBN: 1845938534
Category : Medical
Languages : en
Pages : 320
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Book Description
This book is comprised of 7 chapters covering the geographical distribution and control of ticks and tickborne diseases in the Euro-Asia region. Chapter 1 focuses on the factors behind the emergence and reemergence of tickborne diseases, highlighting the theme of environmental and climatic change and also the renewed interest in ticks and the diseases they transmit, which has been stimulated by an increased awareness of tickborne zoonoses. Chapter 2 describes the basic biology of a total of 25 important tick species endemic to part or all of the geographical region under consideration, and also includes short accounts of their life cycles, geographical distributions and significance as vectors. The factors responsible for the spread and distribution of ticks are considered in chapter 3, which include climate, land use, animal movement (both wild and domestic) and importation of exotic vertebrates. Tickborne infections are reviewed in chapter 4. The geographical distribution of tickborne pathogens is the focus of Chapter 5, in the form of maps with accompanying qualifying and illustrative comments. Chapter 6 addresses the distributions of the vector ticks. Chapter 7 addresses the surveillance and control of ticks and tickborne diseases. It includes a brief description of tick sampling methods, an introduction to the principles of surveillance and monitoring and control options for both ixodids and argasids.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309072786
Category : Science
Languages : en
Pages : 161
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Book Description
Since the dawn of medical science, people have recognized connections between a change in the weather and the appearance of epidemic disease. With today's technology, some hope that it will be possible to build models for predicting the emergence and spread of many infectious diseases based on climate and weather forecasts. However, separating the effects of climate from other effects presents a tremendous scientific challenge. Can we use climate and weather forecasts to predict infectious disease outbreaks? Can the field of public health advance from "surveillance and response" to "prediction and prevention?" And perhaps the most important question of all: Can we predict how global warming will affect the emergence and transmission of infectious disease agents around the world? Under the Weather evaluates our current understanding of the linkages among climate, ecosystems, and infectious disease; it then goes a step further and outlines the research needed to improve our understanding of these linkages. The book also examines the potential for using climate forecasts and ecological observations to help predict infectious disease outbreaks, identifies the necessary components for an epidemic early warning system, and reviews lessons learned from the use of climate forecasts in other realms of human activity.
