News tagged with parasites
Related topics: malaria , mosquitoes , red blood cells , malaria parasite , immune system
Parasitism is a type of symbiotic relationship between two different organisms where one organism, the parasite, takes favor from the host, sometimes for a prolonged time. In general, parasites are much smaller than their hosts, show a high degree of specialization for their mode of life, and reproduce more quickly and in greater numbers than their hosts. Classic examples of parasitism include interactions between vertebrate hosts and diverse animals such as tapeworms, flukes, the Plasmodium species, and scabs. Parasitism is differentiated from parasitoidism, a relationship in which the host is always killed by the parasite such as moths, butterflies, ants, flies and others.
The harm and benefit in parasitic interactions concern the biological fitness of the organisms involved. Parasites reduce host fitness in many ways, ranging from general or specialized pathology (such as castration), impairment of secondary sex characteristics, to the modification of host behaviour. Parasites increase their fitness by exploiting hosts for food, habitat and dispersal.
Although the concept of parasitism applies unambiguously to many cases in nature, it is best considered part of a continuum of types of interactions between species, rather than an exclusive category. Particular interactions between species may satisfy some but not all parts of the definition. In many cases, it is difficult to demonstrate that the host is harmed. In others, there may be no apparent specialization on the part of the parasite, or the interaction between the organisms may be short-lived. In medicine, only eukaryotic organisms are considered parasites, with the exclusion of bacteria and viruses. Some branches of biology, however, regard members of these groups as parasitic.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Melbourne scientists have made the surprise discovery that malaria parasites can 'talk' to each other – a social behaviour to ensure the parasite's survival and improve its chances of being transmitted ...
Medical research May 15, 2013 | not rated yet | 0 |
Newly described type of immune cell and T cells share similar path to maturity, according to new study
(Medical Xpress)—Labs around the world, and a core group at Penn, have been studying recently described populations of immune cells called innate lymphoid cells (ILCs). Some researchers liken them to foot soldiers that ...
Immunology May 14, 2013 | 5 / 5 (3) | 0 |
Gene analysis of malaria parasites has pinpointed western Cambodia as the hotspot of strains that are dangerously resistant to artesiminin, the frontline drug against the disease, scientists said on Sunday.
Genetics Apr 28, 2013 | 5 / 5 (1) | 0
Scientists have discovered how a protein within the malaria parasite is essential to its survival as it develops inside a mosquito. They believe their findings identify this protein as a potential new target for drug treatments ...
Medical research Apr 25, 2013 | not rated yet | 0 |
A new, highly sensitive blood test that quickly detects even the lowest levels of malaria parasites in the body could make a dramatic difference in efforts to tackle the disease in the UK and across the world, according to ...
Diseases, Conditions, Syndromes May 17, 2013 | not rated yet | 0
Researchers at Michigan State University have identified a test that can determine which children with malaria are likely to develop cerebral malaria, a much more life-threatening form of the disease.
Diseases, Conditions, Syndromes May 08, 2013 | not rated yet | 0
A Case Western Reserve University student-led startup aimed at saving lives through faster, better and cheaper malaria diagnosis won the 2013 LaunchTown Entrepreneurship Business Idea Competition at the University of Akron ...
Diseases, Conditions, Syndromes Apr 23, 2013 | not rated yet | 0
Researchers from CNRS, Université Toulouse III - Paul Sabatier and IRD have elucidated new molecular mechanisms involved in resistance to visceral leishmaniasis, a serious parasitic infection. They have shown that dectin-1 ...
Immunology May 16, 2013 | not rated yet | 0
A pioneering mobile device using cutting-edge nanotechnology to rapidly detect malaria infection and drug resistance will be ready for field testing this year, one year ahead of schedule.
Diseases, Conditions, Syndromes Apr 26, 2013 | not rated yet | 0