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Topic: Host biology


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In the News (Fri 25 Dec 09)

  
 Host article - Host English person organisation animal cell computer biology parasite - What-Means.com   (Site not responding. Last check: 2007-10-21)
In biology, a host is an organism that harbors a parasite, mutual partner, or commensal partner, typically providing nourishment and shelter.
A host may also be a group, such as an army or a large number of people under a single cause or banner.
In Roman Catholicism, the host is the transubstantiated bread in the Eucharist.
www.what-means.com /encyclopedia/Host   (261 words)

  
 Host - Wikipedia, the free encyclopedia
In television or radio, the host of a show is the person who presents it - for example Jay Leno is the current host of The Tonight Show.
In biology, a host organism harbors a parasite, mutual partner, or commensal partner, typically providing nourishment and shelter.
In computing, host is any machine connected to a computer network, a node that has a hostname.
en.wikipedia.org /wiki/Host   (430 words)

  
 NIH Guide: ONTOGENY OF PERINATAL HOST DEFENSES
The Developmental Biology, Genetics and Teratology Branch, and Pregnancy and Perinatology Branch of the CRMC are particularly interested in supporting basic studies on the ontogeny of perinatal host defenses and developmental and reproductive immunobiology.
Host defense mechanisms that protect the fetus, neonate and infant are varied, complex and interactive.
Non-specific, natural or innate host defense mechanisms include physical and chemical barriers; humoral components (e.g., serum opsonins, complement factors, fibronectin, c-reactive proteins, and lactoferrin); natural killer (NK) cells; phagocytic cells (e.g., neutrophils, monocytes, macrophages); as well as soluble plasma and tissue proteins that amplify the action of phagocytes to become natural immune effector cells.
grants.nih.gov /GRANTS/guide/rfa-files/RFA-HD-97-002.html   (3250 words)

  
 Tick Biology
Hard ticks seek hosts by an interesting behavior called "questing." Questing ticks crawl up the stems of grass or perch on the edges of leaves on the ground in a typical posture with the front legs extended, especially in response to a host passing by.
This type of tick remains on one host during the larval and nymphal stages, until they become adults, and females drop off the host after feeding to lay their batch of eggs.
Some soft ticks seek hosts by questing on low-lying vegetation, but the vast majority are nest parasites, residing in sheltered environments such as burrows, caves, or nests.
entomology.ucdavis.edu /faculty/rbkimsey/tickbio.html   (1276 words)

  
 Encyclopedia: Host (biology)   (Site not responding. Last check: 2007-10-21)
A parasite is an organism that lives in or on the living tissue of a host organism at the expense of that host.
Cells in culture, stained for keratin (red) and DNA (green) The cell is the structural and functional unit of all living organisms, sometimes called the building blocks of life.
In parasitology, an intermediate host is an organism that is infected with a parasite that will not reproduce sexually within it, while a definitive host is one in which the parasite reproduces.
www.nationmaster.com /encyclopedia/Host-(biology)   (666 words)

  
 Immunology and Infection Unit: Research on cell biology and host-pathogen interactions
Understanding host-pathogen interactions in the leishmaniases requires both knowledge of those parasite factors that are important in virulence and in-depth investigation of host innate and adaptive immune responses to infection.
It is thought these may affect the host response to the bacterial infection differently than single cells, and we are in the process of developing projects to address this.
We are therefore studying the interactions between the intestinal bacterium Helicobacter hepaticus and cells of the innate immune system, such as dendritic cells that are among the first cells of our immune system to come in contact with the organism and that are involved in the initial priming of CD4+ T cells.
www.york.ac.uk /res/iiu/research/HostPath.shtml   (537 words)

  
 Biology 3A - Student Resources   (Site not responding. Last check: 2007-10-21)
Parasite - organism which lives at the expense of (and may even harm) its host; the parasite is generally smaller than the host and is metabolically dependent upon it
Re-isolated from the host that was inoculated with the pure culture
Infect the host - proliferate in host cells or tissues
www.biologycorner.com /bio3/notes-pathology.html   (360 words)

  
 Hosting Comparison :: Web Hosting Reviews and More...
If you've tried some other "bargain" hosts, you know that these times can be orders of magnitude larger, which is just painful when your site has a problem.
I could say you like single-plan hosts, as they came in at positions one, four, and six, but there were still seven in there that are multi-plan.
You like hosts with generous storage and transfer allowances, but that's a bit of a no-brainer.
hosting-comparison.com   (850 words)

  
 DanforthCenter.org
Symposium On Molecular Biology Of Plant-Pathogen Interactions Held At The 17th Annual Ucla (University Of California-Los Angeles) Symposia On Molecular And Cellular Biology, March 26-April 1, 1988.
Fargette, D., and Vie, K. Simulation of the effects of host resistance, reversion, and cutting selection on incidence of african cassava mosaic virus and yield losses in cassava.
Konate, G., and Traore, O. Reservoir hosts of maize streak virus in the Sudano-Sahelian zone: Identification and spatiotemporal distribution.
www.danforthcenter.org /iltab/geminiviridae/referencesindex.html   (11982 words)

  
 The Scale March 1998
In addition, he is evaluating the biogeography and host range for the pit scales and has developed a cladistic analysis of the family members based on the external morphological characters of the adult females.
The phylogenetic position, biology, host plants, geographical distribution and economic importance of the species of Xylococcinae are discussed.
Host suitability is known to increase with host size until A. aurantii reaches maturity, after which it is no longer available for parasitism.
www.sel.barc.usda.gov /coccoidea/scale1998.htm   (15707 words)

  
 Biology: Human Host and Malaria | CDC Malaria
Intravascular hemolysis does not appear to be a major contributor to malarial anemia except in the pathological state known as flwater fever.
Innate factors are those specific characteristics of a host that are present from birth.
This ability to generate different forms and a diversity of polymorphism within the antigenic targets of the host's immune system help the parasites to evade malarial immunity.
www.cdc.gov /malaria/biology/humanhost   (1277 words)

  
 Biology 3A Notes - Viruses   (Site not responding. Last check: 2007-10-21)
Viruses multiply, or replicate using their own genetic material and the host cell's machinery to create more viruses.
Viruses cannot reproduce on their own, and must infect a host cell in order to create more viruses.
Penetration - the virus is engulfed by the cell, or some viruses have surface proteins that bind to receptors on the host cell, causes the host cell to either fuse with the virus or absorb the virus.
www.biologycorner.com /bio3/notes-virus.html   (462 words)

  
 Theriot Lab Research
Both grow directly in the cytoplasm of infected host cells, and move rapidly throughout the infected cell using a remarkable form of actin-based motility.
Within a few hours after infection, host cell actin filaments initially form a dense cloud around the intracytoplasmic bacteria, and then rearrange to form a polarized "comet tail," which is associated with all moving bacteria.
We are currently attempting to identify host cell factors that interact with the bacterial proteins so that we can reconstitute motility in a defined biochemical system.
cmgm.stanford.edu /theriot/research.htm   (1410 words)

  
 CDC Activities: Biology of Host-Parasite Relationships | CDC Malaria
The simian malaria parasites in their macaque monkey hosts make excellent dependable models for the biology of the human malarias in human hosts.
However, only the New world primates can be infected with the human parasites and as such are the only available animal models to study vaccine efficacy or drug susceptibility of human malaria parasites.
These nonhuman primate hosts of human malarias and of the simian malaria parasites also offer faithful models to investigate mechanisms and treatments for severe pathology associated with malaria infections such as anemia, cerebral malaria and malaria in pregnancy.
www.cdc.gov /Malaria/cdcactivities/host_parasite.htm   (1142 words)

  
 Division of Infectious Diseases, School of Public Health at UC Berkeley
Review of genetic epidemiology with emphasis on novel methods of molecular biology and genetics, including role of genetic factors in human disease and their interaction with environmental and cultural factors, population polymorphisms, role of inbreeding, and epidemiology of multifactorial diseases.
Prerequisite: Upper division courses in molecular biology, parasitology, biochemistry, immunology, microbiology, or consent of instructor.
Topics include the molecular biology of tumor viruses; mechanisms of viral carcinogenesis; vs. characteristics of virally transformed cells; the epidemiology, pathology, diagnosis, treatment, and prevention of virally caused cancers; problems of proving the etiology of virally caused cancers.
socrates.berkeley.edu /~microbes/i_courses.html   (1197 words)

  
 Directory of Parasitologists in Canada   (Site not responding. Last check: 2007-10-21)
Biology of the sea serpent Cadborosaurus willsi B and L. Publication of AMPHIPACIFICA, Journal of Systematic Biology.
The influence of infection and host nutrition on the populations structure of mosquito larvae.
Impact of infection on the survival and reproduction of intermediate hosts.
www.biology.ualberta.ca /parasites/texten/direct.htm   (7619 words)

  
 [No title]
"Genetics of physiological and behavioral resistance to host furanocoumarins in the parsnip webworm." Evolution: 46(5): 1373-1384.
"Host range of a plant pathogenic fungus determined by a saponin detoxifying enzyme." Science 267: 371-374.
"Clonal biology of caespitose grasses." Population Biology of Grasses: 106-135.
www.geneseo.edu /~hartvig/research/library.htm   (11449 words)

  
 TEKTRAN Melaleuca Research   (Site not responding. Last check: 2007-10-21)
Biology and Host-range of Pomponatius Typicus Distant (Heteroptera: Coreidae), a Potential Biological Control Agent for the Paperbark Tree, Melaleuca Quinquenervia in Southern Florida.
Biology and Host-range of Pomponatius Typicus (Heteroptera:coreidae), a Potential Biological Control Agent for the Paperbark Tree, Melaleuca Quinquenervia in South Florida.
Distribution, Biology and Host-range of the Melaleuca Leaf-blotching Bug, E Ucercoris Suspectus.
www.nal.usda.gov /ttic/tektran/news/melaleuca.htm   (380 words)

  
 Tick Biology, Hard and Soft Ticks, Control
Mating usually occurs while adult ticks are on the body of the host animal.
Like the larva, the nymph must be able to live without feeding for long periods of time until it finds a suitable host.
It is from these advantageous positions that they wait for a suitable host to pass by.
www.pestproducts.com /ticks3.htm   (530 words)

  
 Table of contents for The influence of cooperative bacteria on animal host biology   (Site not responding. Last check: 2007-10-21)
Table of contents for The influence of cooperative bacteria on animal host biology / edited by Margaret J. McFall-Ngai, Brian Henderson, Edward G. Ruby.
Interactions between inherited bacteria and their hosts: The Wolbachia paradigm Zoe L Veneti, Max Reuter, Horacio Montenegro, Emily A Hornett, Sylvain Charlat and Gregory D Hurst 8.
Host responses to bacteria; Innate immunity in invertebrates L Courtney Smith 15.
www.loc.gov /catdir/toc/ecip059/2005006653.html   (399 words)

  
 Annual report of Biology of Host-Parasite Interactions for year 2004
The research activities of the different groups in the ‘Unité are mostly based on the red blood cell stage of the P.
Antigenic Variation is a strategy employed by malaria species to outmanoeuvre the host defence mechanisms long enough for their progeny to spread.
We localised the parasite homologue to the GSK-3 (Glycogen Synthase Kinase-3) in association with membranous structures, the Maurer's clefts, in the cytoplasm of the infected red blood cell (collaboration with Dr. L.
www.pasteur.fr /recherche/RAR/RAR2004/print/Bihp-en.html   (1316 words)

  
 The Influence of Cooperative Bacteria on Animal Host Biology - Review 0521834651   (Site not responding. Last check: 2007-10-21)
The Influence of Cooperative Bacteria on Animal Host Biology (Advances in Molecular and Cellular Microbiology)
Ninety percent of the cells in the human body are bacteria, and humans may be host to many thousands of different species of bacteria.
These striking statistics are part of a new paradigm in microbiology in which bacteria are no longer viewed as disease-causing killers but more as lifelong partners which are often essential for the survival of their host.
books.bankhacker.com /The+Influence+of+Cooperative+Bacteria+on+Animal+Host+Biology   (223 words)

  
 IngentaConnect Biology, host specificity tests, and risk assessment of the sawfl...   (Site not responding. Last check: 2007-10-21)
IngentaConnect Biology, host specificity tests, and risk assessment of the sawfl...
Biology, host specificity tests, and risk assessment of the sawfly Heteroperreyia hubrichi, a potential biological control agent of Schinus terebinthifolius in Hawaii
A risk analysis was conducted to quantify the acceptability of non-target species as host plants for H.
api.ingentaconnect.com /content/klu/bico/2003/00000048/00000004/05115485   (389 words)

  
 Host (biology) - Encyclopedia.WorldSearch   (Site not responding. Last check: 2007-10-21)
The Oestrid Flies: Biology, Host-Parasite Relationships, Impact and Management (Cabi Publishing)
Anemone Fishes and Their Host Sea Anemones : a Guide for Aquarists and Divers
Parascript: Parasites and the Language of Evolution (Smithsonian Series in Comparative Evolutionary Biology)
encyclopedia.worldsearch.com /host_(biology).htm   (300 words)

  
 Dr. Trevor Hawkeswood: Cosmopolitan University
Hawkeswood, T.J. Observations on the biology and host plants of the
A note on the biology and host plant of Cisseis sp.
Observations on the habitat and an apparently new larval host plant of Phalaenoides glycinae (Lewin, 1805)(Lepidoptera: Noctuidae: Agaristinae) in the Sydney district, New South Wales, Australia.
www.cosmoedu.net /hawkeswood.html   (3692 words)

  
 Systems Biology Host/Pathogen and Other 'Community' Interactions   (Site not responding. Last check: 2007-10-21)
Systems biology addresses a novel approach to study, analyze and, finally, control biological systems.
Unlike traditional research that typically focus on single genes, systems biology, as coined by Leroy Hood, studies complex interaction of all levels of biological information; genes, transcription factor binding sites on genomic DNA, mRNA, proteins, protein complexes, information and biochemical networks.
I anticipate that the tutorial will trigger key opportunities for advancements in the identification of system components and their interactions, in the reconstruction of pathways and networks, and, finally, in control of biological systems of host pathogen and community interaction.
psb.stanford.edu /psb04/tut_forst.html   (404 words)

  
 Biology Online. Life Science Reference
The biology forum is divided into different categories so that you can post and find answers with ease and also create biology related communities (or colonies if you wish).
The biology tutorials aim to give an introductory to intermediate understanding of various biological concepts and disciplines, split up into sections for ease of use.
Within each tutorial are references to the biology dictionary, intending to give an easy reference to the terminology used.
www.biology-online.org /dictionary.asp?Term=parasite   (237 words)

  
 Host (biology)   (Site not responding. Last check: 2007-10-21)
CDFD to host international symposium on insect genetics and genomics at Hyderabad on January 9-11, 2006 (PharmaBiz)
The Centre for DNA Fingerprinting and Diagnostics (CDFD) is hosting an international symposium on insect genetics and genomics at Hyderabad between January 9-11, 2006.
The symposium is expected to provide an opportunity to researchers, teachers and students to acquaint with the recent research in the relevant.
214053.mallforeverything.com   (752 words)

  
 TEKTRAN Yellow Starthistle Research   (Site not responding. Last check: 2007-10-21)
Biology, Ethology And Impact On the Host By Coniatus Tamarisci F. (Col.: Curculionidae), A Natural Enemy of Tamarix Spp.
Preliminary Studies On the Biology And Host Specificity of Aceria Salsolae And Lixus Slasolae, Two Candidates For Biological Control of Salsola Kali.
Biology, Impact and Preliminary Host Specificity of the Rust Fungus, Uromyces Salsolae Reichardt, a Potential Biological Control Agent for Salsola Kali L. in the USA
www.nal.usda.gov /ttic/tektran/news/thistle.htm   (349 words)

  
 Biology 216 - Host Parasite Interactions
Basic perspective of Host/Parasite interactions A. Balance: Host defenses (health) <-----------> Microbe factors (disease) Infection is the rule/disease is the exception Lives of a cell (Lewis Thomas): Bad business to kill your host; Evolutionary tendency towards attenuation.
Infection - colonization of host by microbe (may or may not lead to disease).
Formed outside host (intoxications) - botulism, staph food poisoning Formed on surface - cholera, diphtheria Formed inside host - tetanus ADP-ribosylating toxins (about 1/2 of known exotoxins) NAD + X (cell target) --> ADP-ribose-X (inactive) + nicotinamide Ex.
www.csuchico.edu /biol/personnel/Hanne/MedBactNotes/Lect07HostDef.html   (715 words)

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