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Tag: "bite" at biology news

Malaria parasites develop in lymph nodes

...as measured directly how many parasites a mosquito bite transmits or where else in a mammal's body they tr...dium parasites, and then allowed the mosquitoes to bite a mouse. From each mosquito bite, they found an average of 20 fluorescent parasites embedded in the ...

Taking a bite out of a fellow worker helps wasps recruit new foragers

...sp. If you were, chances are your nestmates might bite you to communicate that it is time to leave the nest and forage for the colony, according to research by a University of Washington animal behaviorist. Biting is a way that workers in a colony of the social wasp Polybia occidentalis recruit new fora...

U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming

...ilies that they find on the ocean floor but rather bite pieces right off their prey, giving sea lilies plenty of incentive to shed their stalk ends and flee. "It's the lizard's tail strategy," said Baumiller, who is also a curator in the UM Museum of Paleontology. "The sea lily just leaves the stalk end ...

Creeping crinoids! Sea lilies crawl to escape predators, new video shows

...ilies that they find on the ocean floor but rather bite pieces right off their prey, giving sea lilies plenty of incentive to shed their stalk ends and flee. "It's the lizard's tail strategy," said Baumiller, who is also a curator in the UM Museum of Paleontology. "The sea lily just leaves the stalk end ...

K-State researchers study insects' immune system

...o's immune system, Kanost said. For a mosquito to bite one human, acquire a disease and then transfer it to the next person it bites poses an interesting concept for researchers. For the disease to spread, it has to survive for a certain period of time in the mosquito. The question is, how does the patho...

Biotech cotton 8: Bugs 0

...Tabashnik said that doesn't mean the insects won't bite back in the future. "It's not that pink bollworm can't beat Bt toxin, but that it hasn't beaten Bt toxin so far." There's a new variety Bt cotton now available that has two different Bt toxins, he said. The team's next step will be to determine how ...

Bronx Zoo bears are new Samsonite gorillas

...ars. The bears attempted to open, claw, crush, and bite their way into the container. After some 30 minutes of effort, the bears lost interest, leaving the scratched but still unopened container for keepers to recover. In the Adirondack State Park, conservationists are working to minimize conflicts betwe...

Weapon performance determines mating success in the collared lizard

...test the hypothesis that weapon performance (i.e., bite force) is a better predictor of fitness than body size and weapon size. The study finds that bite-force performance was a strong predictor of reproductive success. However, no size measure was correlated with any estimate of mating success or with p...

Infectious disease expert warns of spread of Rocky Mountain spotted fever

...e spread by ticks that carry the bacteria and then bite humans, leaving behind the tick's bacteria-filled saliva. Once inside the body, the infection spreads rapidly, causing inflammation of the blood vessels, shock and the build-up of fluid inside the lungs and brain. The precise origins of Rocky Mountai...

Mosquito study shows new, faster way West Nile can spread

...ansmission, mosquitoes acquire the virus when they bite birds with high levels of virus (or "high viremia....quitoes acquired the virus. In one trial, a single bite from a donor mosquito was sufficient to infect two out of 87 recipient mosquitoes. The discovery ca...

Researchers discover how malaria parasite disperses from red blood cells

...oes and is transmitted to human beings through the bite of infected mosquitoes. The parasite infects red blood cells. Called a merozoite at the stage of its life when it infects red blood cells, the parasite multiplies inside the cell, until the cell ruptures and releases them. The newly released meroz...

Primate virus jumps species barrier to humans for first time in Asia

... into a temple, can greatly increase the risk of a bite or scratch, which can lead to transmission of infection. Visitors occasionally engage in other risky behavior, such as touching animals or trying to hold baby monkeys. Limiting such behavior can reduce the risk of bites and scratches. "If you look a...

NIAID begins clinical trial of West Nile virus vaccine

...virus usually is transmitted to humans through the bite of a mosquito that has been infected after feeding on an infected bird or animal. The virus also can be spread through blood transfusions, organ transplants and breastfeeding, as well as from mother to child during pregnancy. Most people experience n...

WHO Warns Of Increased Risk Of Vector-borne Diseases In Tsunami-affected Areas

...ether mosquitoes - which generally mostly live and bite outdoors - will start biting indoors more frequent...vention tool), while malaria is spread through the bite of a female Anopheles mosquito. With no medical treatment available for dengue fever, case manageme...

Spider Venom Could Yield Eco-Friendly Insecticides

...nyche versuta) -- a large Australian spider with a bite that is deadly to humans and insects -- is an ideal source of venom for King's research. The spider "cooperates" by rearing up in a fighting stance when provoked, making it relatively easy for researchers to aspirate venom directly from its fangs. Si...

Ecological destruction fuels emerging diseases

...e evolutionary land mines are going to jump up and bite us." ...

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