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Bites in Biological News

A recipe for dog bite injuries: Kids, dogs and warm weather

... children are especially vulnerable to severe dog bites in the head and neck areas, and that there is a correlation between cases of dog bites and rising temperatures. "A dog is man's best ... up to 19 years old who were treated for dog bites at Women and Children's Hospital in Buffalo ...

Earlier bites by uninfected mosquitoes boost West Nile deaths in lab mice

... bitten by mosquitoes, scientists have discovered: bites from mosquitoes that arent infected by the West ... researchers were surprised to find that mosquito bites seemed to have a detrimental effect with West Nile virus, because multiple earlier bites from other uninfected arthropods can actually ...

Moving in for the winter toxic brown recluse spiders pose danger

... spiders are not aggressive, and because they are so reclusive, most bites happen by accident, according to Richard Houseman, associate professor of ... clothing, shoes and bedding each time the items are used. "Often, bites occur when a person puts on a jacket or clothing that has a brown recluse ...

A combined tooth-venom arsenal revealed as key to Komodo dragon's hunting strategy

... computer techniques to analyze stress in a dragon's jaws and compare them to those of a crocodile. The dragons were found to have much weaker bites than crocodiles, but magnetic resonance imaging (MRI) of a preserved dragon head revealed complex venom glands and specialised serrated teeth which ...

Komodo even more deadly than thought: Research

... through rapid blood loss." The researchers used computer modeling to analyse the Komodo dragon bite and found that dragons have much weaker bites than crocodiles of a similar size. However, magnetic resonance imaging revealed the dragons have complex venom glands as well. After surgically ...

Snakes and how they helped our big brains evolve

... attention. A social activity (no one points when alone) dependent on fast and accurate localization, pointing would have reduced deadly snake bites among our hominin ancestors. It might have also figured in later human behavior: Snakes, "The Fruit, the Tree, and the Serpent" eloquently ...

Study unravels why certain fishes went extinct 65 million years ago

... you sliced it, the data showed that if you were a big fish with a fast bite you were toast," he said. Ironically, today's large fishes with fast bites evolved relatively shortly after the end-Cretaceous extinction, apparently filling the functional and ecological roles vacated by the victims of that ...

Exploring the dynamic relationship between health and environment

... After clearing a swath of Amazonian rainforest, local residents experience an increase in the number of mosquito bites and a spike in malaria. Veterinarians keep their cattle healthy with doses of anti-parasiticsmedication that can harm populations of local ...

Researchers identify new way the malaria parasite and red blood cells interact

... cells, which could lead to the development of a vaccine cocktail to fight the mosquito-borne disease. Malaria is transmitted to humans through bites from mosquitoes. According to the Centers for Disease Control and Prevention, between 350 million and 500 million cases of malaria occur world-wide ...

Study: Bird diversity lessens human exposure to West Nile Virus

... "The mechanisms are similar to those described for the ecology of Lyme disease. Most birds are poor reservoirs for West Nile Virus, and so mosquito bites taken on them are 'wasted' from the perspective of the virus. Where many bird species exist, very few mosquitoes get infected, and so we humans are ...

Rattlesnake-type poisons used by superbug bacteria to beat our defenses

... rattlesnake venom. In the case of rattlesnake venom the protein causes the host cells to commit suicide and die, which is one reason why rattlesnake bites are so dangerous. The research team is currently studying the protein to see if it functions in the same way. In addition the scientists have ...

Midge-hunting scientists tackle spread of devastating bluetongue virus

... establish under what weather conditions the midges are mostly likely to be flying around and when they are most likely to be giving disease-spreading bites to farm animals. This will allow the team, led by Dr Simon Carpenter, to advise farmers when it is safest to move susceptible animals and also ...

Researchers put the bite on mosquitoes

... malaria, yellow fever, Dengue fever or West Nile virus. But if researchers from The University of Arizona in Tucson have their way, one day mosquito bites may prove deadly to the mosquitoes as well. "Our goal is to turn the female mosquito's blood meal into the last meal she ever eats," said project ...

USDA Cooperative Agreement funds mosquito project at Rutgers

... States, providing citizens better opportunities for outdoor activities. Indeed, one upshot of this project will be assessing whether reduced bites result in increased outdoor physical activity, especially by children--a finding that would have tremendous implications in our efforts to reduce ...

West Nile virus' spread through nerve cells linked to serious complication

... that build up in the blood. "Paralysis might not require such high levels of infection," he theorizes. "What may happen instead is if a mosquito bites you and the virus is able to replicate in the vicinity of a nerve, by the time the immune system has cleared the infection in the skin, a small ...

The world's oldest bacteria

... to the same genetic level. But our findings allows us to post the question: are we dealing with a circular evolution where development, so to speak, bites its own tail if and when ancient DNA are mixed with new", says Eske Willerslev. ...

The insect vector always bites twice

... be transmitted to the human host when the insect bites again to take another blood meal. Morbidity among ... to assess specifically the degree of exposure to bites of each of these species. Starting from ... mainly from the angle of allergic responses to bites or in the search for veterinary vaccines, ...

Multiple malaria infection inhibits spread of parasite

... are more frequently immune. Infectious bites Each year more than 200 million people ... of the capital Yaoundé, 34 infectious bites per person per year were found to occur. The ... In the village Koundou, the number of infectious bites was about five times as high as in the capital. ...

Mosquito repellents that emit high-pitched sounds don't prevent bites

... female mosquitoes, and therefore protects people in the vicinity from bites and disease. To test these claims a team of Cochrane Researchers ... on whether EMRs prevent malaria, the fact that they failed to reduce bites means that they could not reduce infection rates. ...

Evolution mystery: Spider venom and bacteria share same toxin

... activity may help with developing treatments that minimize the effects of bites of brown recluse and their relatives. If this motif is central to protein function, treatments designed for the spider bites may also work for treating problems caused by the corynebacterial toxin," ...

Malaria parasites develop in lymph nodes

... online on January 22, 2006. When a mosquito infected with Plasmodium bites a mammal, the immature parasites travel to the animal's liver, which, ... vessels. About 25 percent of the parasites injected by the mosquito bites were drained by lymphatic vessels and ended up in lymph nodes close to the ...

Researchers identify protein crucial for survival of Lyme-disease bacterium

... in infected mammals and in the midgut of ticks. When an infected tick bites an animal or a human, the bacteria are transmitted to the new host. ... bacteria were unable to utilize the blood on which the tick feeds when it bites a victim. "As far as we can tell, Bb bacteria normally utilize blood as ...

Ice Age extinction claimed highly carnivorous Alaskan wolves

... wolves differed from modern wolves not only in their genes, but also in their skulls and teeth, which were robust and more adapted for forceful bites and shearing flesh than are those of modern wolves. They also showed a higher incidence of broken teeth than living wolves. “Taken together, ...

Fused nasal bones helped tyrannosaurids dismember prey

... stronger than unfused carnosaur nasals. This extensive fusion increased the strength of such dinosaurs as the T. rex and helped them apply powerful bites that could splinter bone. With other carnivorous dinosaurs, says Snively, their skull bones might shear apart slightly when they chomp down on other ...

Leeches ferry infection among newts

... not appear to kill amphibians but might affect their ability to reproduce. "This is the first evidence that newts are getting infected through the bites of leeches," said Thomas R. Raffel, a postdoctoral researcher at Penn State's Center for Infectious Disease Dynamics, and the study's lead author. ...

Nonvenomous Asian snakes 'borrow' defensive poison from toxic toads

... Most snakes are born with poisonous bites they use for defense. But what can non-poisonous snakes do to ward off predators? What if they could borrow a dose of poison by eating toxic toads, ...

Tarantula venom and chili peppers target same pain sensor

... an electrical signal that travels to the brain to produce pain. The researchers examined venoms from 22 spider and scorpion species whose bites are known to cause pain. Venom from the tarantula Psalmopoeus cambridgei activated the capsaicin receptor, also called TRPV1, and the researchers ...

New strategy developed to combat West Nile Virus

... of mosquito infects the birds and another species then passes the disease along to humans. "Florida has one species of mosquito that routinely bites both," he added. Not all of the world's more than 3,600 species of mosquitoes transmit diseases to humans. The mosquito must be sufficiently ...

UGA study explains peaks and troughs of dengue epidemics

... substandard housing in mosquito-infested areas. And the ease of travel brings the virus to areas that were previously dengue-free when a mosquito bites an infected traveler and then spreads it to others. According to the Centers for Disease Control and Prevention, Aedes aegypti and the related Aedes ...

Performing monkeys in Asia carry viruses that could jump species to humans

... monkeys, by preventing the animals from climbing on them and by keeping food away from the macaques. Such precautions can help reduce the risk of bites and scratches from the monkeys. This study included researchers at Bogor Agricultural University in Bogor, Indonesia, and the Southwest National ...

K-State researchers study insects' immune system

... the mosquito'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 ...

Hurricane aftermath: Infectious disease threats from common, not exotic, diseases

... with available antibiotics. Diseases caused by consumption of contaminated food or water as well as diseases caused by mosquitoes or other insect bites are also a threat. Vibrio vunificus can also cause serious infections, either wound infections or blood poisoning (septicemia); V. vulnificus is ...

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

... 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 at free-ranging monkeys in Singapore's nature reserves, you see that feeding by visitors is not allowed, and it is ...

Caloric restriction won't dramatically extend life span in humans: UCLA research

... "normal" amounts of food, Phelan said. "I think about food all the time," he said. "I'm not going to be so extreme that I become the mouse that bites anyone who touches me. My advice about food is be sensible, and don't be a fanatic about it because the payoffs are not worth it." While the ...

A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs

... caused by snakes are elements of the temporal pattern," she says. "Snake bites, in general, last longer than raindrops, and the spaces between snake bites are generally longer than the spaces between raindrops." To test the hypothesis that embryos use these features of vibrations to assess danger, ...

Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine

... strike." Historically, the terms "plague" or "Black Death" have referred to the bubonic plague, caused by Yersinia pestis and spread by the bites of infected fleas, which acquire the germ from infected rodents. In the mid-14th century, the plague swept through Europe killing nearly one-third of ...
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(Date:10/18/2014)... of 2,000 patients referred for evaluation of suspected ... diagnosis for 25 percent, including detection of a ... contributing to disease, according to a study appearing ... released to coincide with the American Society of ... the exons or coding regions of thousands of ...
(Date:10/17/2014)... German . ... in order to reproduce? And why are there two sexes ... latest issue of the research journal Molecular Human Reproduction ... Ramm from Bielefeld University Bielefeld has compiled this special issue ... a female to copulate with several males in quick succession ...
(Date:10/16/2014)... wages war on the human body. Battles are ... In pancreatic cancer, this stalemate—known as tumor dormancy—can ... malignant, a phenomena that is poorly understood. ... laboratory of Salvatore Torquato, a Professor of Chemistry ... surrounding tumor dormancy and the switch to a ...
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(Date:10/22/2014)... 2014 During the Western United States’ ... runs dangerously low, Southern Oregon’s water is proving resistant ... the lowest mountain snow pack on record in 2014, ... early autumn.* That was the observation of journalist-hikers Art ... “Hiking Southern Oregon,” during an interview with water advocate ...
(Date:10/22/2014)... Lintelus, Inc., an event software provider, ... Sales, will be speaking on the subject of “Event ... October 28, at the Holiday Inn in New York ... well as a Tech Demo at 12:45pm, to educate ... more engaging event experience. , The Annual Meetings Technology ...
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(Date:10/22/2014)... Dennis Thompson HealthDay Reporter ... was diagnosed with Ebola while working for NBC News ... leave the special isolation unit at Nebraska Medical Center in Omaha, ... hospital said Tuesday. A blood test confirmed by the U.S. ... can head home to Providence, R.I., NBC News reported ...
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