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Tag: "acquired" at biology news

ASU research shows connection between testosterone, dietary antioxidants and bird coloration

...mune system. They went on to show that carotenoids acquired from food and circulating through the blood were changing in ways that were linked to testosterone levels. Birds who were given additional testosterone depleted their carotenoid levels and became healthier, as if they were combating testosterone dire...

Potent possibilities for parasite attack

...enome. The parasite genes are thought to have been acquired from bacterial species that have very similar sequences. "CFAS is involved in virulence and persistence in Mycobacterium, causative agent of tuberculosis, so the identification of a CFAS gene in Leishmania raises the exciting possibility that some...

Researchers discover 'acquired' DNA key to certain bacterial infection

...mately humans – is an “island” of genetic material acquired through evolution from another bacterium, accordin...cine and an author of the study. “Without these acquired genes, the bacterium is very inefficient in infecting environmental amoeba, which is the environment...

Genome of Clostridium botulinum reveals the background to world's deadliest toxin

... in which more than 10 per cent of genes have been acquired from other bacteria, there is almost no footprint of these in C. botulinum." There are several types of C. botulinum: although described as variants of a single species, they are really very different organisms linked simply because they have the ...

HIV and malaria combine to adversely affect pregnant women and their infants

... protection in the face of HIV we learned how they acquired protection against malaria in the first place." PAM occurs when red blood cells infected with malaria parasites gather in the placenta resulting in damage to both mother and developing infant. First-time mothers are particularly susceptible to PA...

Eavesdropping comes naturally to young song sparrows

...ugh they learned from both tutors, the young birds acquired more than twice as many songs from the tutor on wh...h a tutor. The remaining 30 percent of songs were acquired when they were listening to tutors early in life. Beecher thinks the young birds learn more by ea...

Study suggests some drug resistance to influenza B medications

...or whether they are transmitted within families or acquired from the community, the resistant variants may be here to stay. In light of the recent observation that oseltamivir may be less effective against influenza B than against influenza A, an important concern is whether suboptimal dosing for these viruse...

Study finds antibiotic resistance in poultry even when antibiotics were not used

...to the farm harboring resistant bacteria, possibly acquired as they were developing in their eggs. "The resistances don't necessarily come from antibiotic use in the birds that we eat," Lee said, "so banning antibiotic use on the farm isn't going to help. You have to put in some work before that." Lee a...

Africa's first large-scale HIV vaccine study launches

...o treatment for any sexually transmitted infection acquired during the study. Recent research has shown that men who are circumcised are less likely to become HIV infected when they have sexual relations with women. As a result, access to medical circumcision also will be provided to male participants who ch...

Study shows hope for early diagnosis of Alzheimer's

...were suited for the study. Kounios and his team acquired the EEG data from the participants. They used a specific protocol, called the “oddball paradigm with novel sounds,?to collect the EEG signals, during which patients hear a series of low- and high-frequency tones as well as some novel sounds. Patients...

Phthalates now linked to fat, related health risks

...nic, cross-section sampling of the U.S. population acquired routinely by the Centers for Disease Control and Prevention. Researchers reviewed data from 1999 to 2002, the most recent years that phthalates levels were available. Of the adult men available in NHANES, 1,451 had data on phthalate exposures, obesit...

Tracing broken wiring in stroke patients

...possibly maintaining fixation and therefore can be acquired even in patients that cannot perform a task?This significantly widens the range of patients that can participate in functional brain-imaging protocols." ...

Paleontologists discover new mammal from Mesozoic Era

... in the evolutionary process of how modern mammals acquired their middle ear structure." Yanoconodon is about 5 inches (or 15 cm) long and estimated to weigh about 30 grams. Its teeth are notable for the three cusps in a straight line on molars (thus known as a triconodont) for feeding on insects and worms...

Researchers from the UGR use a bacterium to obtain biopreservatives from food

...icrobial agents because of the stronger resistance acquired by bacteria. Researcher Sánchez Hidalgo points out that natural antimicrobial cationic peptides such as bacteriocins "represent a good alternative." Bacteriocins are proteins that are biologically active against members of the same species or spec...

Gallium: A new antibacterial agent?

... individuals with cystic fibrosis and of infection acquired in hospital. ...

Antibody signal may redirect inflammation to fuel cancer

... decades that B cells of the so-called adaptive or acquired immune system are activated following a bacterial infection and in response, produce antibodies that signal leukocytes to attack," said Coussens, associate professor of pathology in the UCSF Cancer Research Institute. "But in precancerous tissue in m...

New research may overturn conventional wisdom on drug-resistant tuberculosis

... for the disease may be due to new infections, not acquired resistance. If confirmed in future studies the res...rd therapy. This resistance was long thought to be acquired through mutations in the infecting strain when the treatment regimen was inadequate or the patient d...

Will the plague pathogen become resistant to antibiotics?

...s. "The discovery that the multiresistance plasmid acquired by the plague bacillus is widespread in environmental bacteria reinforces this warning". There have been many plague epidemics in human history, and Y. pestis is believed to have killed an estimated 200 million people. Plague is now regarded as a ...

Experimental vaccine given during pregnancy reduces stillbirths from common virus

...hat the rodents given the experimental vaccine had acquired immunity to guinea pig CMV because they produced antibodies to the virus—proteins that target foreign molecules for later destruction by the immune system. The vaccinated guinea pigs also showed an activity against the virus by their T cells, immune...

Making mice with enhanced color vision

...k-in mice mimic how our earliest primate ancestors acquired trichromatic vision, color vision based on three receptors. At some point in the past, random mutations created a variant of one receptor gene, located on the X chromosome, producing two different receptor types. Present-day New World (South Americ...

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