Tag: "protozoan" at biology news

High resolution satellite imagery assists hunt for infectious 'kissing bugs'

...re harmless by themselves, but carry a microscopic protozoan parasite that causes the wasting and eventually lethal Chagas disease. Secondary sources of infection can include ingesting contaminated food, mother to child transmission like during breast feeding and tainted blood transfusions. Infection by this T...

Study probes ecosystem of tree holes

...nces, and so on."Kneitel studied between 20 and 25 protozoan species and four rotifers; protozoans are single-celled organisms, rotifers, multi-celled, yet some protozoans are bigger than rotifers and will prey upon them. Mosquito larvae browse and filter-feed and will attack either of the groups of species. ...

Top US scientist honored with prestigious award

...een devoted to the study of Trypanosoma cruzi, the protozoan parasite responsible for Chagas disease, a debilitating and often fatal condition. Her research group was the first to discover that the parasite scavenges a crucial molecule - sialic acid - directly from its host's surface cell and transfers it to r...

Using soils as filters to prevent 'crypto' from moving to the groundwater

...10 years including cryptosporidiosis caused by the protozoan pathogen Cryptosporidium parvum. Standard chlorine disinfection is not effective at killing the pathogen. Although several "crypto" outbreaks have occurred in the U.S., the most severe problem is in Africa where both the sanitary conditions are poor ...

Parasite's enzyme structure helps address a public health issue

...he study helps better define the evolution of this protozoan family that includes Plasmodium, which causes mala...s, Anderson says. "By using the structure of many protozoan DHFR-TS enzymes, we've been able to place a number of protozoa in distinct evolutionary families. Th...

Carnegie Mellon scientists create unique DNA probe with great potential

...ere of a well-studied model organism, the ciliated protozoan Oxytricha nova. In the laboratory, this sequence has the interesting property of being able to adapt its structure to the surrounding conditions, shifting between a four-stranded quadruplex with all strands extended, as in the PNA2-DNA2 hybrid quadru...

Cat parasite killing otters; Michigan's perch pressured; HACCP for medicine

...Toxoplasma gondii - a potentially lethal parasitic protozoan that causes brain infections in otters - than otters from areas where runoff is light. The scientists' best guess is that parasite eggs in cat droppings are washed into coastal-bound storm drains and creeks. Although many different kinds of animals,...

Scientists decipher genetic code of malaria parasite

...ses lymphatic filariasis Trichomonas vaginalis, a protozoan parasite which causes vaginitis Theileria parva, a malaria-like parasite that causes East Coast fever in African cattle. The Institute for Genomic Research (TIGR) is a not-for-profit research institute based in Rockville, Maryland. TIGR, which s...

NHGRI adds cow and dog to high priority list for sequencing model organisms

...ed the priority of Oxytricha trifallax, a ciliated protozoan that has been used in scientific studies for more than a century, from moderate to high priority. The proposal to sequence the free-living, single-celled organism came from a team of researchers at the University of Utah, Princeton University and the...

Diagnostic kit for Chagas' disease rewarded by the Altran Foundation

... La Paz. Chagas' disease is caused by a flagellate protozoan parasite, Trypanosoma cruzi, transmitted by a blood-sucking louse. Infection hits 24 millions people in the world and about 15% of the Bolivian population are affected by this parasite, although the disease remains in a latent stage for one in two pe...

Warmer world will be a sicker world, say scientists

...arasites. The edibleeastern oyster is plagued by a protozoan parasite called Perkinsus. A winterwarming trend in the mid 1990's lifted a barrier to northward movement andallowed this parasite to spread northward into previously unexposed Maineoysters. Biodiversity Buffers Disease Outbreaks "The diseases we...

Membrane filters offer options for cleaner water

...usands of illnesses in Milwaukee in 1993 when that protozoan got into the city's water supply. But these membrane filters are expensive, and aren't as widely used in large-scale operations." Chellam's research group is studying various types of novel filtration membranes that might be used to remove the small...

Protozoan chosen for genome sequencing

(Santa Barbara, Calif.) A protozoan that has been studied by a University of California, Santa Barbara scientist for the past 46 years has been assigned high priority for genome sequencing by the National Human Genome Research Institute (NHGRI). Called Tetrahymena, the single-celled o...

NHGRI prioritizes model organisms for sequencing

...iology. Tetrahymena thermophila -Studies of the protozoan Tetrahymena have made major contributions to genet... programmed genome rearrangements.Two organisms, a protozoan (Oxytricha trifallax) and the rhesus macaque (Macaca mulatta) were accorded moderate priority for se...

'Buried dams' help clean recycled water

...xplains. Weve looked at enteric (gut) viruses, the protozoan Cryptosporidium, and disease-causing bacteria like Salmonella and Aeromonas. If we are to store large volumes of water underground for recycling, we need to know exactly what happens with these bugs, and whether they can survive in reclaimed water. O...

Dartmouth researchers expose weakness of common parasite

...lasmosis caused by a diverse, but related group of protozoan parasites. Barbara A. Fox, a research associate, ...e pathway may ultimately prove to be a weakness of protozoan parasites."...

Microbe genes help scientists reconstruct animal origins

...to have evolved in the ancient stew of microscopic protozoan life Ancient microbes eventually gave rise not on...lution of multicellular animals from a unicellular protozoan ancestor has long been recognized as a pivotal transition in the history of life. "The question is,...

Cellular organelle evolved repeatedly

...ecies. The hydrogenosomes of Nyctotherus ovalis, a protozoan from the gut of the cockroach, still very much resemble mitochondria. Those of Neocallimastix and Piromyces, fungi from the gut of the llama and the Indian elephant, look entirely different. Besides the differences, there are also many points of sim...

Researchers' mathematical model provides chagas disease insights

...n trypanosomiasis, is caused by infection with the protozoan parasite Trypanosoma cruzi and occurs predominantly in rural Latin America. Some cases have also been reported in the southern U.S. The research provides an immediate and practical defense against the disease, complementing the more commonly implemen...

FDA approves new treatment, Campath , humanized monoclonal antibody, for patients with B-cell chronic lymphocytic leukemia

...ous, sometimes fatal bacterial, viral, fungal, and protozoan infections have been reported in patients receiving Campath. Summary of Efficacy and Safety Data In evaluating Campath, the FDA reviewed efficacy data from a single arm, clinical trial (Study 211) involving 93 patients with B-CLL, as well as tw...

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