Head lice reveal contact between modern and ancient humans
...us . Lice require direct physical contact between hosts for transmission and consequently their genetic sequence can mirror the evolutionary fortune of their hosts. Reed and colleagues reconstructed the evolutionary history of the head/body louse Pediculus humanus , by comparing the appearance and genes ...DFG research training groups become increasingly international
...lems. The interaction between pathogens and their hosts at the molecular level is the topic of the interdisciplinary group "Genetic and Immunologic Determinants of Pathogen-Host-Interactions" at the Humboldt University in Berlin. Whereas the studies into virology, bacteriology and parasitology are still h...Fly gut's 'sticky spot' for leishmaniasis parasite
...asites usually like to "stick" around inside their hosts while they mature and prepare to infect again. Now, Jesus Valenzuela and colleagues have identified the molecular receptor inside the midgut of the sand fly Phlebotomus papatasi that provides the "flypaper" for the parasite that causes the major form...Gene exchange between species is aided by parasitism
... that genes can move from plant parasites to plant hosts complements a report by University of Michigan and...wed the opposite -- that genes can move from plant hosts to plant parasites. Taken together, the findings establish plant parasitism as the first known mediu...In a tiny squid, bacterial toxin governs organ development
...nisms that play important roles within their human hosts also are at risk. From a scientific perspective, the new findings may encourage researchers to begin to pay more attention to the many microbes that live in association with humans. The advent of new genetic sequencing technology is...A puzzle posed by black-headed ducks yields to persistent biologists
...u wouldn't expect there to be much pressure on the hosts to evolve defenses against this kind of parasitism...y investigated the costs of duck parasitism to the hosts and found few costs that could be prevented by rejection of the duck eggs. In contrast, the intraspe...Common lineage suggested for viruses that infect hosts from all three domains of life
... structural similarities among viruses that infect hosts from all three domains of life. These structural s...oteins and architecture--among viruses that infect hosts from all three domains of life. The three domains are eukarya (animals, plants, and other higher ord...Next edition of textbook ushers cellular microbiology out of infancy
...f virus infection; and use of simple nonvertebrate hosts to model mammalian pathogenesis. All chapters are revised and organized like the first edition to provide fundamental details of each discipline along with the cellular microbiology aspects. ...In wake of Lyme disease vaccine for people, mice may be next in line for shots
... "We've learned we shouldn't naively ignore other hosts shrews, chipmunks, robins, and maybe others," Tsao said. "Unexpectedly, other hosts contribute more to maintaining bacteria than we had thought. Other people might be deterred by the...Scientists discover unique microbe in California's largest lake
...is what allowed the microbe to survive without its hosts in the saline lake. At the University of Oregon since 1990, Wood is a member of the UO's Center for Ecology and Evolutionary Biology. She has played a key role in changing the scientific world's understanding of how ocean food webs are based on much ...Scientists reveal molecular secrets of the malaria parasite
...ve on a molecular level as they move between their hosts and insect vectors. That focus on the parasites' c...mosquito vectors, three stages in their vertebrate hosts and a sexual development stage during which the parasite is transmitted between vector and host. The...Research turning up the heat on fowl bacteria
...cause," says Dr. Thompson. "Bacteria exploit their hosts to live." And the human body is ripe for picking. "Think about it, inside human cells are tons of goodies, all kinds of sugars and other elements. If bacteria can get there, cause the cells and tissue to become inflamed, cells starts releasing all th...Selective predation and productivity jointly drive complex behavior in host-parasite systems
...ows how predators that strongly prefer parasitized hosts can introduce "Allee effects" for parasites at low...f the biological and ecosystem background in which hosts and parasites interact....Calit2 launches prize program to encourage bioinformatics research by UCSD undergraduates
...the support of Calit2 on numerous projects. Calit2 hosts the HAP webserver (link below), an interactive software tool developed by Eskin's group, and has committed funds to support the undergrad research symposium. "Given its mandate to promote interdisciplinary research and education," noted Eskin, "Calit...In the migratory marathon, parasitized monarchs drop out early
...that seemingly small effects of parasites on their hosts could have a much larger impact when combined with the stresses of long-distance migration....Genome of deadly amoeba shows surprising complexity, evidence of lateral gene transfer
...isease hits only a small fraction of those who are hosts to the parasite. "Intestinal infections are one of the major health problems in developing countries and the number of people who are infected with amoeba cysts is enormous," he says. Typically, those cysts are transmitted when people ingest c...Emory study finds monarch health tied to migration
...that seemingly small effects of parasites on their hosts can have a larger impact when combined with the stresses of migration," Altizer says....Celebrex provides a two pronged attack against prostate cancer
...ed that celecoxib worked in animals that served as hosts for human prostate tumors. In this animal model, celecoxib not only was shown to reduce proliferation of cancer cells, but also reduced the growth of blood vessels at the tumor sites. As a result, tumor mass and blood vessel density in the treated a......d larva, carrying the bacteria, and look for other hosts to begin the cycle again. These juveniles also can... temperature and moisture requirements, the insect hosts it colonizes and other characteristics. Lists of EPN evolutionary associations, called phylogenies, ...