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Tag: "parasite" at biology news

The insect vector always bites twice

...oliferate in the vector’s body. In most cases, the parasite moves back into the vector’s salivary glands in order to be transmitted to the human host when the insect bites again to take another blood meal. Morbidity among infected people is therefore associated with the degree of exposure of the subject to in...

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

...cessary to molecularly understand how the malarial parasite Plasmodium falciparum (P. falciparum), has become ...alaria, which is caused by a single-cell protozoan parasite transmitted by the bite of the female Anopheles mosquito. There are about 160 different species of m...

Potent possibilities for parasite attack

A comparison of three parasite species that cause Leishmaniasis has identified a ...ect at the University of York. "Perhaps only a few parasite genes are important in determining which type of disease develops after infection and the host genom...

Amphibians in losing race with environmental change

...te from grazing animals has led to higher rates of parasite infections, and chemical contamination of aquatic systems is also more common. Many animal species lay their eggs communally or congregate socially, often to avoid predation or improve resource use. But global warming has caused higher levels of...

Toxoplasmosis infection trick revealed by scientists

... protein which is released onto the surface of the parasite just before it invades host cells in the human bod...ars on the surface of the host cell, assisting the parasite to stick to, and then enter the human cell. Using a novel carbohydrate microarray the team were ...

Parasites' impact goes beyond host to affect ecosystem

...d’s and Byers?hypothesis: snails infected with the parasite ate 40 percent less macroalgae than uninfected snails. In the field, where researchers measured the macroalgae in three types of bottomless cages -- with no snails (control), uninfected snails, and infected snails -- they similarly saw less reduction...

Leeches ferry infection among newts

...micals injected by the leech, could be used by the parasite as a cue to release its packet of spores. The spor...phibian parasites. That is because this particular parasite lodges itself in muscle tissue instead of blood. A leech would have to be feeding right on top of a ...

Farmed salmon could become an invasive species in forest streams

...tlantic salmon could transmit a serious disease or parasite to native fishes. Escaped salmon may eventually adapt to local conditions, leading to self-sustaining populations. Escaped salmon could compete with already at-risk species, such as steelhead. "Given the precarious state of many of o...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

Researchers have decoded the genetic makeup of the parasite that causes trichomoniasis, one of the most common...ns (STIs), revealing potential clues as to why the parasite has become increasingly drug resistant and suggesting possible pathways for new treatments, diagnost...

World's largest flower evolved from family of much tinier blooms

...y in Harvard's Faculty of Arts and Sciences. "As a parasite living inside the tissue of a tropical vine, the plant lacks leaves, shoots, or roots, making it difficult to compare to more conventional plants. Most efforts to place plants in the botanical tree of life in the past 25 years have tracked ancestry u...

Researchers discover surprising drug that blocks malaria

...ation ?propranolol ?jams the signal to prevent the parasite from breaking in. Scientists had long been p...sistant. New drugs are urgently needed because the parasite has evolved resistance against virtually all types of commonly used drugs," said Kasturi Haldar, pri...

Scientists perform 'tricky' operation

...gets can really take-off." Amazingly, the pesky parasite was found to have an exceptionally large collection of DNA, with the possibility of having more genes than humans. But Ms Dunne said while the sequencing of the genome project has largely elevated awareness of T. vaginalis among researchers, publ...

Parasite infection may benefit MS patients

...The first study examining the relationship between parasite infections and MS in humans suggests that such inf...Previous studies involving animals have shown that parasite infection can influence the course of autoimmune diseases. These studies suggest that individuals wi...

Multiple malaria infection inhibits spread of parasite

...on. Malaria is not caused by a mosquito but by a parasite in the mosquito. The malaria parasite needs the mosquito to reproduce and spread. The gametocyte is the developmental stage of the parasit...

Common parasitic infection leads to increased risk for HIV infection

...nfection. Also, the study noted, the T. vaginalis parasite has been shown to break down an enzyme that blocks HIV attachment to cells. The findings from this study provide support for prevention and treatment of sexually transmitted diseases such as trichomoniasis as important strategies for preventing HI...

New findings could lead to vaccine for severe malaria

...roduced some important findings on how the malaria parasite conceals itself in the placenta. Plasmodium falci...er university in Uganda to study in detail how the parasite infects the placenta. Their results, which are published in the American scientific journal PNAS, ca...

'GreeneChip' -- New diagnostic tool that rapidly and accurately identifies multiple pathogens

... Analysis identified a Plasmodium (the species of parasite that causes human malaria). Chart review showed that the patient had recently arrived in Angola from a country where malaria was not endemic and that he had not taken malaria prophylaxis. Had the GreeneChip been available in the field to confirm the...

Bad blood between boys and girls

...ech Republic. They found that the presence of the parasite Toxoplasma gondii in the mothers' blood, one of the most common parasites in humans with a worldwide prevalence of 20-80%, increased the likelihood that these women would give birth to a boy. This is the first study, published in Springer's journal ...

Resistance and genetic sensitivity to sleeping sickness

...anifests itself in two forms, corresponding to two parasite subspecies. The chronic form, encountered in Centr...t's ability to respond to infection, the degree of parasite virulence or pathogenicity and the environment. An IRD team focused particularly on the role of h...

Stanford discovery may help predict when toxoplasma can be deadly

Toxoplasma is arguably the most successful animal parasite on earth: It infects hundreds of species of warm-b...he infection. Humans can become infected by the parasite by accidentally consuming or inhaling the cysts from infected cat feces, by eating meat from an in...

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