Sentences with phrase «by parasites which»

Description Gray whales are identified by their scars left by parasites which drop off in the colder waters of Vancouver Island and Alaska.

May be caused by parasites which destroy the bacteria beds and allow yeast overgrowth.

One of their findings indicates that a very large proportion of demon shrimp are «intersex» — displaying male and female characteristics, which is caused by parasites which «feminize» the host.

Researchers from the University of Miami, Florida and the Universitat Autònoma de Barcelona have developed a method which allows to drastically reduce the drug dose, since it improves its efficacy 83 %, multiplies by 10 the capacity of the drug to attack cell infected by the parasite which provokes the disease, and significantly reduces the toxicity of the parasite.

Heartworm disease is caused by a parasite which is transmitted to dogs and cats by mosquitos.

This is in part due to the fact that zombies of this alternate timeline are also affected by a parasite which makes them essentially immortal, developing buboes to fill in gaps and wounds.

Not exact matches

Israeli startup Prospera recently attracted $ 7 million to fund its approach, which is to install cameras along with other sensors in fields and compare crops «leaf by leaf» with its database of thousands of plants to identify problems like pests, parasites and nutrient deficiencies.

The national income accounts initially were designed by statisticians, but now they're designed by lobbyists, and the lobbyists work in Congress to say here's how we want to depict the economy as if it's actually benefiting the voters instead of specifically benefiting the FIRE sector — Finance, Insurance and Real Estate — which depicts itself as contributing to growth rather than being a parasite on growth, as I've described in Killing the Host.

Because of high stocking densities, the fish on ocean - based farms are often affected by parasites and diseases, which they pass to fish living near the farms.

Chagas disease is caused by the parasite Trypanosoma cruzi, which, in different forms, infects both humans and insects.

A vaccine must incorporate key proteins from the malaria parasites, which will trigger production of antibodies by the immune system.

In particular, the influence of warmer temperatures on moose nutritional condition and moose parasites, including a fatal brain worm parasite that is spread by white - tail deer, which have moved farther north into moose territory as the climate has gotten milder.

The parasites might trigger these problems, the scientists hypothesized, by upsetting the normal balance between cells known as osteoclasts, which dissolve bone, and cells called osteoblasts, which build it back up.

The findings, by researchers at Washington University School of Medicine in St. Louis, suggest that manipulating the gut's microbial communities may protect against intestinal parasites, which affect more than 1 billion people worldwide.

In Chinook salmon in Alaska's Yukon River, for example, the prevalence and mortality from the parasite Ichthyophonus has recently risen in concert with climate change, which has increased river temperatures by an alarming 5 degrees Celsius.

Plowe is trying to develop surveillance methods that hit the «sweet spot,» by which he means sensitive enough to detect very low parasite loads in asymptomatic carriers — microscopy is too crude — but portable enough to use in the field.

«Currently, I am fascinated by the fact that, during the cycle of malaria, there are stages in which the parasites are dormant... I am trying to understand what makes them rest and wake up again,» he explains.

If there can be a low - cost vaccine which is effective in rendering the parasite harmless, then millions of lives can be saved and this will also benefit the economy by millions of dollars each year, says Prof Preiser.

Surprisingly, the mutant parasites can not be killed by the anti-malarial drug chloroquine, which interferes with hemozoin formation, but yet, remain sensitive to the drug artesunate which targets another pathway of hemoglobin digestion.

Dr Natalie Spillman, from the Research School of Biology at ANU studied the mechanism by which the parasites are killed.

The risk of developing severe malaria turns out to be strongly linked to the process by which the malaria parasite gains entry to the human red blood cell.

This will provide information that could be used to illuminate how malaria — a disease which causes more than half a million deaths a year — is spread from human to human by parasite - infected female mosquitoes which bite people to feed on blood they need in order to reproduce.

Leishmaniasis is caused by the protozoan leishmania parasites, which are transmitted by the bite of infected female phlebotomine sandflies — flies that are three times smaller than a mosquito.

The research has revealed that a receptor called «P2Y2 - R», which picks up the signals to switch on this pump, is blocked when infected by the Toxoplasma gondii parasite.

By studying how mitochondria respond to a parasitic infection, Pernas has begun to probe the ways access to nutrients in the cell — which both the cell and the parasite need — shapes an infection.

The drug activation level was found to be much lower in ring stage parasites, given that artemisinin activation requires haem, which is of much lower abundance and is biosynthesised by the parasite.

Twice a week, families were visited by researchers who asked questions about the child's health, monitored growth and collected blood and stool samples, which were later tested for a variety of bacteria and parasites.

First, after a person is bitten by a parasite - carrying mosquito there is an initial infection in the liver, followed by the long - lasting red blood cell stage where the clinical symptoms of the malaria disease occur, and finally the mosquito stage, which is required to transmit the parasites to other people.

The parasite which causes the disease can be quickly reintroduced to a malaria free area by highly mobile populations.

The critical oxygen level varied with the metabolic state of the tested crabs — which the researchers could raise by increasing the water temperature, feeding a crab a meal of menhaden, or using crabs infected with a parasite known to boost metabolism.

«Our study demonstrates that parasites being attracted by feces does not appear to be the reason for which evolution has favoured this behaviour, despite this having been traditionally assumed to be the case,» Juan Diego Ibáñez - Álamo said, the paper's main author and an investigator at the Spanish National Scientific Research Council's (CSIC) Doñana Biological Station and at the University of Groningen (Netherlands).

«Urogenital Schistosoma infestation, which is caused by S. haematobium, also causes hemorrhagic cystitis, likely by triggering inflammation when the parasite's eggs are deposited in the bladder wall or as eggs pass from the bladder into the urinary stream.

One possible reason is suggested by the new study, carried out by the London School of Hygiene & Tropical Medicine and Malaria Consortium, which has indicated that although resistant mosquitoes are surviving contact with the insecticide, the malaria parasites inside those mosquitoes are affected by the chemicals.

Artemisinin has a chemical structure called a peroxide bridge, which can be cleaved by iron ions to form free radicals that attack a range of proteins and other biomolecules; some researchers suspected that such an attack would be fatal for the parasites.

They enrolled 280 patients in a trial that compared the standard eflornithine regimen with one in which only 14 infusions of that drug were given over a week's time, combined with 10 days of nifurtimox, an oral drug licensed against Chagas disease — which is also caused by Trypanosoma parasites — but not considered active enough as a standalone HAT drug.

She was responding to a recent editorial in another journal in which «[t] he authors described the concern of some scientists about the rise of an underclass of «research parasites» who exploit data sets that are collected and curated by others.»

Understanding such changes, he says, «may help us understand the pathological pathways by which the parasite causes so much disease.»

After extracting and analyzing DNA at the core of the coprolites, which haven't been contaminated by microbes in the soil, the researchers found that although both tribes consumed seafood, only the Saladoid samples contained freshwater fish parasites, suggesting that the tribe consumed raw fish regularly.

Among such parasites are certain thorny - headed worms, which infest pill bugs that are later eaten by songbirds

The researchers reached these conclusions by conducting a cluster randomized controlled trial in which 367 parasite - negative school - aged children in Northern Ethiopia were randomly assigned to either the handwashing intervention, the nail clipping intervention, both interventions, or neither intervention for 6 months.

The mechanisms by which these parasites are commanding their hosts remain, by in large, unsolved mysteries.

The two researchers found that schizophrenics often carried antibodies for toxoplasma, a parasite spread by house cats; Epstein - Barr virus, which causes mononucleosis; and cytomegalovirus.

«There are many diseases, not only Cryptococcosis, in which pathogens — bacteria, viruses, fungi or parasites that can cause disease — survive by deliberately hijacking the immune system in this way.

An estimated 220 million people are infected each year by malaria - causing Plasmodium parasites, which are transmitted by the bite of an infected mosquito.

«Our findings support PfSEA - 1 as a potential vaccine candidate, and we are confident that by partnering with our colleagues at the National Institutes of Health and other researchers focused on vaccines to prevent the parasites from entering red blood cells, we can approach the parasite from all angles, which could help us develop a truly effective vaccine to prevent this infectious disease that kills millions of children every year.»

Avian malaria is mainly caused by the parasite Plasmodium relictum, which reproduces in red blood cells.

After ingestion by the hosts, sporozoites rapidly differentiate into tachyzoites, fast - replicating parasites which disseminate within the host and lead to the acute phase of infection.

The malaria parasite survives in its host by remodeling the red blood cells in which it dwells.

The researchers came across the parasite pomphorhynchus laevis, or the spiny - headed worm, which dwells in fish and attaches to hosts by sticking its proboscis into the intestinal wall and then inflating the appendage's tip, mechanically locking it into place.

The variant surface antigens expressed on Plasmodium falciparum - infected erythrocytes are potentially important targets of immunity to malaria and are encoded, at least in part, by a family of var genes, about 60 of which are present within every parasite genome.