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Tag: "parasites" at biology news

Ecological destruction fuels emerging diseases

...ical damage also endangers human health by turning parasites into "evolutionary land mines." Dr. Daniel (Dan) ... jaguars. For his part, Dr. Brooks has looked for parasites in more than 4,000 individuals from species ranging from frogs to deer. So far, he has found more th...

Researchers reveal the infectious impact of salmon farms on wild salmon

...here the study took place. In Europe, transfer of parasites is generally accepted as a significant threat to a...balance. When infection rates are high enough, the parasites feed on the fish at rates greater than the fish can feed itself, literally eating the fish alive. Ad...

A bacterial genome reveals new targets to combat infectious disease

...are at risk for infection with filarial nematodes, parasites that cause elephantiasis, African river blindness, and other debilitating diseases in more than 150 million people worldwide. The nematodes themselves play host to bacteria that live within their cells, but in this case, the relationship is classic m...

Scientists reveal molecular secrets of the malaria parasite

...human/mouse). Thatmay represent a mechanism by the parasites to repulse the attack of thehost's immune system. * For the first time, scientists were able tostudy the protein expression of the parasite in the mosquito vector.Researchers hope this will shed light on how the mosquito and parasiteinteract, and per...

UCSD discovery may help extend life of natural pesticide

...against roundworms that parasitize humans. "These parasites infect nearly one-third of the human population and pose a significant health problem in developing countries," said Aroian. "Perhaps one-day vertebrate-safe Bt toxins could be used as human therapies against these parasites." Griffitts and Aroian c...

In the migratory marathon, parasitized monarchs drop out early

...hether these long journeys can limit the spread of parasites by weeding out diseased animals. Monarch butterfli...study demonstrated that seemingly small effects of parasites on their hosts could have a much larger impact when combined with the stresses of long-distance migr...

Protein offers way to stop microscopic parasites in their tracks

...to stop or slow cell invasion by malaria and other parasites known as apicomplexans. Results of the study will...of water-borne disease in the world. "These other parasites are more devastating in terms of the number of people they affect, but they're somewhat harder to wo...

Yale researchers identify molecule for detecting parasitic infection in humans

...provides insight into understanding how infectious parasites interface with the immune system--a problem of great scientific and clinical importance. Most infections are caused by bacterial or viral microorganisms that produce molecules quite different from those produced by humans and other eukaryotic organi...

Molecular models advance the fight against malaria

...artmouth Medical School, demonstrating how malaria parasites form mutations that make them stubbornly resistant...market, there is significant evidence that malaria parasites are quickly developing resistance to that drug as well. According to WHO estimates, 40% of the world...

Reducing malarial transmission in Africa

...t might reduce selective transmission of resistant parasites in treated patients. Citation: Sutherland CJ, Ord R, Dunyo S, Jawara M, Drakeley CJ, et al. (2005) Reduction of malaria transmission to Anopheles mosquitoes with a six-dose regimen of coartemether. PLoS Med 2(4): e92. ...

A human parasite with a streamlined mitochondrion

...owever, some eukaryotic cells, including important parasites of humans--such as Entamoeba histolytica, the causal agent of amoebic dysentery--live in environments that are too oxygen poor to support this process. Nevertheless, Entamoeba still contains a somewhat mysterious organelle, called a mitosome, that is...

OneWorld Health drug receives 'Orphan' designation from U.S. and European regulatory agencies

...transmitted by sand flies, which spread leishmania parasites that attack internal organs. An estimated 1.5 million people worldwide are currently infected; the number of new VL cases per year is estimated at 500,000; and as many as 200,000 people die annually. More than 90 percent of VL cases occur in five cou...

New strategies to reduce hospital-aquired infections

...waterborne microbes- -bacteria, viruses, fungi and parasites --can enter into the healthcare environment in several ways: direct contact with or ingestion of drinking water or ice, breathing aerosols from showers and faucets and even from improperly reprocessed medical devices. As hospitals increasingly recogn...

Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST)

...waterborne microbes- -bacteria, viruses, fungi and parasites --can enter into the healthcare environment in several ways: direct contact with or ingestion of drinking water or ice, breathing aerosols from showers and faucets and even from improperly reprocessed medical devices. As hospitals increasingly recogn...

Natural Killers Could Lead to New Hepatitis Treatments

...hepatitis. Hepatitis can be a reaction to viruses, parasites such as malaria or other infections. Learning to “call off?the NKT cell's pursuit and attack could offer a treatment for hepatitis and associated complications. The researchers, led by Dan Littman, a Howard Hughes Medical Institute investigator at N...

Newly discovered protein an important tool for sleeping sickness research

...gen, thus assuring the long-term survival of these parasites within their hosts. The trypanosome has approximately 1,000 different VSG genes, but only expresses one at a time while the others are somehow silenced. This genetic trick, called antigenic variation, has severely limited sleeping sickness treatment ...

Breakthrough System for Understanding Ocean Plant Life Announced

...gen, thus assuring the long-term survival of these parasites within their hosts. The trypanosome has approximately 1,000 different VSG genes, but only expresses one at a time while the others are somehow silenced. This genetic trick, called antigenic variation, has severely limited sleeping sickness treatment ...

Malaria mechanism revealed

...ecular structure of a protein that enables malaria parasites to invade red blood cells, researchers have uncove... children. The disease is caused by mosquito-borne parasites of the genus Plasmodium (primarily Plasmodium falciparum). Following the initial stages of infection...

Gene expands malaria's invasion options

...und only two genes whose activity differed between parasites that used sialic acid and those that did not. The ...0 times more active in the sialic acid-independent parasites than in those that needed the sugar for cell entry. These results suggested that activation of th...

Measuring hidden parasites in falciparum malaria

A new technique for measuring hidden malaria parasites and assessing severity of disease is described in ...y of disease is measured by counting the number of parasites in the blood under the microscope, but this method ignores parasites which are in red blood cells tr...

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