Immune evasion and defense strategies in parasitic protozoa-host interactions PDF Download
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Author: Jian Du
Publisher: Frontiers Media SA
ISBN: 2832509738
Category : Science
Languages : en
Pages : 231
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Book Description
Author: Jian Du
Publisher: Frontiers Media SA
ISBN: 2832509738
Category : Science
Languages : en
Pages : 231
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Book Description
Author: Alexandre Morrot
Publisher: Frontiers Media SA
ISBN: 2832553311
Category : Medical
Languages : en
Pages : 477
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Book Description
The protozoa are the most ancient members of the animal kingdom and they have evolved the intracellular parasitism to ensure their survival strategies. Protozoan parasites that infect humans are extremely diverse among eukaryotes. They are responsible for many human diseases such as amebiasis, Chagas disease, malaria, toxoplasmosis, leishmaniasis and African sleeping sickness. The ability of protozoans to cause disease depends on the nature and number of infecting organisms, the route of infection, the virulence factors associated with the microorganism, and the strength of host defenses. This host-parasite interaction is also subject to constant change as the infection proceeds and can lead to a range of outcomes, from elimination of the pathogen to death of the host, depending on the states of latency and the extent of colonization that the protozoan achieves in the course of infection. Several species of parasitic protozoa harbor specialized virulence factors whose products can overcome the host´s immunity and promote their survival. These factors act at several different checkpoints of the host immune responses, from the first components of the innate immune response to the induction and maintenance of adaptive memory responses. Many protozoan species have evolved mechanisms that modulate and inhibit host sensors, microRNA circuits and signaling pathways that permit the host to detect infection. These factors can act, inter alia, by inhibiting the complement cascade, subverting phagocyte activation and impairing leukocyte migratory responses, so undermining the immune system thus facilitating the pathogen evasion and its continued persistence in the host. In this research topic we welcome the contribution of original research article as well as reviews on the field.
Author: Xuexian Yang
Publisher: Frontiers Media SA
ISBN: 283254973X
Category : Medical
Languages : en
Pages : 144
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Book Description
Protozoan and helminth parasites infect animals and humans and cause debilitating pathologies that cause a variety of morbidities and deaths worldwide. The ability of parasites to establish infection and cause disease in mammalian hosts is a result of a series of intricate mechanisms evolved by parasitic species to confront and evade the host's defensive responses, along with the ability to use the host’s metabolic and catabolic processes and host cellular organelles to their benefit. For instance, parasites may have predilection sites in the host that are not accessible to immune effector molecules and mechanisms, may acquire host-derived "masking" molecules, can vary their surface molecules, and can produce molecules that block or misguide the host immune responses. The host's interactions with the parasite, on the other hand, are critical for the initiation and induction of host signaling events that are critical in mounting formidable defensive immune responses against the invading parasite. Therefore, the ability of a parasite to successfully establish infection and cause disease largely depends on its interaction with the host and the ability of the host to mount successful and effective resistance. Thus, studying host-parasite interactions and cross-talks is critical for understanding parasite infection and adaptation mechanisms within the host, as well as for developing strategies for effective prevention and control of parasitic infections in humans and animals. The topic will cover a wide spectrum of parasitic protozoa and helminths and provide an opportunity to share new molecular and translational advances in parasitic infections and diseases.
Author: Farhat Afrin
Publisher: BoD – Books on Demand
ISBN: 1789841011
Category : Medical
Languages : en
Pages : 234
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Book Description
Leishmania parasites plague the mammalian host causing high morbidity and mortality. The parasites persist in the hostile milieu, crippling its defensive arsenal. In the face of mounting resistance to an antiquated drug arsenal, new approaches are urgently desired to keep the infection at bay. Furthermore, to strengthen the leishmaniasis elimination drive, particular emphasis has to be laid on identification of new targets and vaccination strategies. This book gives a brief glimpse of the epidemiology of leishmaniasis, immune evasion, vaccination, and therapeutic modalities that may work by untangling the immunological cross-wires of pathogenic cross-talk. The Conventional treatment and its drawbacks, the prospects of phytotherapy and nanomedicines, are also discussed. The identification of drug targets with the aim of designing inhibitors is also exemplified.
Author: Kenneth Murphy
Publisher: Garland Science
ISBN: 9780815344575
Category : Medical
Languages : en
Pages :
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Book Description
The Janeway's Immunobiology CD-ROM, Immunobiology Interactive, is included with each book, and can be purchased separately. It contains animations and videos with voiceover narration, as well as the figures from the text for presentation purposes.
Author: K.-P. Chang
Publisher: Springer
ISBN: 9783540180784
Category : Science
Languages : en
Pages : 425
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Book Description
Tropical diseases such as leishmaniasis, malaria. trypanosomiasis, toxoplasmosis and amebiasis continue to plague the world, resulting in considerable morbidity and mortality, especially in the third world countries. These diseases are caused by a group of protozoa which have, over the years, undergone evolutionary adaptation to live often intracellularly in a parasitic way of life. So well-adapted have they become that they recognize the right hosts or cells to parasitize, yet at the same time they escape recognition and destruction by the host immune system. The mechanisms of such recognition and the escape of recognition are governed largely by host-parasite surface membrane interactions at the cellular and molecular level. Unique molecules produced by unusual pathways of these parasites have also been discovered and found to play important roles in their survival in the host. Understanding these mechanisms and pathways is essential not only to formulate a rational strategy for chemo- and immuno-prophylaxis and -therapy but also to unravel the mystery of biological evolution in symbiosis and parasitism. In the advent of our knowledge on the molecular biology and biochemistry of parasite membrane and other molecules, it is opportune to examine and discuss their possible roles in host-parasite recognition and interaction in a comparative approach. To highlight the recent advances of this area in various host-parasite systems, a NATO advanced Research Workshop was held from September 27 to October 1, 1986 at Hotel Villa del Mare, Acquafredda di Maratea, Italy.
Author: Steven A. Frank
Publisher: Princeton University Press
ISBN: 9780691095950
Category : Medical
Languages : en
Pages : 364
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Author: Derek Wakelin
Publisher: Cambridge University Press
ISBN: 9780521562454
Category : Science
Languages : en
Pages : 224
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Book Description
This completely updated second edition provides a clear account of how immune responses operate and how parasites can evade immunity. Parasites have evolved to exploit hosts' bodies, whereas hosts have evolved immune systems to control infections. Host-parasite interactions therefore provide fascinating examples of evolutionary "arms-races" in which the immune system plays a key role. Including an expanded section on anti-parasite vaccines, the text focuses on modern research in immunoparasitology directed at understanding and exploiting the capacity to develop effective anti-parasite immunity. The experimental basis of this research is emphasized throughout. The text is aimed at undergraduates and postgraduates with interests in either parasitology or immunology and contains introductory sections on these topics.
Author:
Publisher:
ISBN: 9780815332183
Category : Cells
Languages : en
Pages : 0
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Book Description
Author: H. Charles J. Godfray
Publisher: Princeton University Press
ISBN: 069120702X
Category : Science
Languages : en
Pages : 484
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Book Description
Parasitoids lay their eggs on or in the bodies of other species of insect, and the parasitoid larvae develop by feeding on the host, causing its eventual death. Known for a long time to applied biologists for their importance in regulating the population densities of economic pests, parasitoids have recently proven to be valuable tools in testing many aspects of evolutionary theory. This book synthesizes the work of both schools of parasitoid biology and asks how a consideration of evolutionary biology can help us understand the behavior, ecology, and diversity of the approximately one to two million species of parasitoid found on earth. After a general introduction to parasitoid natural history and taxonomy, the first part of the book treats the different components of the reproductive strategy of parasitoids: searching for a host, host selection, clutch size, and the sex ratio. Subsequent chapters discuss pathogens and non-Mendelian genetic elements that affect sexual reproduction; evolutionary aspects of the physiological interactions between parasitoid and host; mating strategies; life history theory and community ecology. A special effort is made to discuss the theoretical background to the subject, but without the use of mathematics.
