background preloader

Flu Attack! How A Virus Invades Your Body

Flu Attack! How A Virus Invades Your Body

http://www.youtube.com/watch?v=Rpj0emEGShQ

Related:  Biology and GeneticsBiologydraanaBiology & Genetics

Twin DNA test: Why identical criminals may no longer be safe 14 January 2014Last updated at 20:57 ET By Alison Gee BBC World Service It's well known that identical twins are not totally identical - they can, usually, be told apart, after all. But up to now it has been almost impossible to distinguish their DNA. It's claimed that a new test can do it quickly and affordably, however - and this could help police solve a number of crimes. At the end of 2012, six women were raped in Marseille, in the south of France. Evidence, including DNA, led police to not one, but two suspects - identical twins Elwin and Yohan.

The Story of Cholera Cholera is caused by Vibrio cholerae, a Gram negative, curved rod-shaped bacterium. For more information about its taxonomy and structure, go to the National Institutes of Health or the World Health Organization. Cholera caused discord when an outbreak in Haiti after the 2010 earthquake killed more than 8,000 citizens. The country had not dealt with a cholera epidemic in a century, according to a Foreign Affairs article about the situation, "Peace and Pestilence," which also described the outrage that spread when investigators discovered the origins of the pathogen in Haiti. Nepalese peacekeepers from the United Nations had been disposing of human waste improperly--sending cholera into a tributary feeding the largest river in the nation.

Doctors 3D-print 'living' body parts Image copyright Wake Forest Custom-made, living body parts have been 3D-printed in a significant advance for regenerative medicine, say scientists. The sections of bone, muscle and cartilage all functioned normally when implanted into animals. The breakthrough, published in Nature Biotechnology, raises the hope of using living tissues to repair the body. Experts described the technology, developed in the US, as a "goose that really does lay golden eggs".

Gene therapy 'could be used to treat blindness' 15 January 2014Last updated at 20:55 ET By Pallab Ghosh Science correspondent, BBC News Jonathan Wyatt likened his blindness to being at the edge of an abyss Surgeons in Oxford have used a gene therapy technique to improve the vision of six patients who would otherwise have gone blind. How a few scientists transformed the way we think about disease - Tien Nguyen Dr. John Snow is considered as one of the fathers of epidemiology. He became interested in the cause of cholera after treating many patients afflicted with the disease. More details about his life and work can be foundhere. Dr. Robert Koch’s work in germ theory actually began with the study of Anthrax and led to the development of experiments that would link a bacterium to a disease.

Sperm carries information about dad's weight Turns out dads are also eating for two. A study published December 3 in Cell Metabolism reveals that a man's weight affects the heritable information contained in sperm. The sperm cells of lean and obese men possess different epigenetic marks, notable at gene regions associated with the control of appetite. The comparisons, which included 13 lean men and 10 obese men, offer one biological explanation for why children of obese fathers are themselves more predisposed to obesity. Mutation in key gene allows Tibetans to thrive at high altitude Buddhist monks at a monastery in Xiahe. The gene mutation is an adaptation to low oxygen levels on the Tibetan plateau. Photograph: Mark Ralston/AFP/Getty Images A gene that controls red blood cell production evolved quickly to enable Tibetans to tolerate high altitudes, a study suggests. The finding could lead researchers to new genes controlling oxygen metabolism in the body. An international team of researchers compared the DNA of 50 Tibetans with that of 40 Han Chinese and found 34 mutations that have become more common in Tibetans in the 2,750 years since the populations split.

This TED Talk Shows How Mucus Is There To Keep Us Healthy When you say mucus, most people automatically think of the stuff that comes out of a person’s nose when they're sick. That is true, however — as disgusting as mucus may seem — it is actually keeping us healthy. In a recent TED Talk, speaker Katharina Ribbeck explains the various ways our mucus is actually looking out for us. Nano-balls filled with poison wipe out metastatic cancer in mice For most cancer patients, it’s not the original tumor that poses the greatest risk. It’s the metastases that invade the lung, liver, and other tissues. Now, researchers have come up with an approach that tricks these spinoff tumors into swallowing poison. Stem cell 'major discovery' claimed 29 January 2014Last updated at 06:52 ET By James Gallagher Health and science reporter, BBC News Stem cell researchers are heralding a "major scientific discovery", with the potential to start a new age of personalised medicine. Scientists in Japan showed stem cells can now be made quickly just by dipping blood cells into acid.

Differences between Eczema, Psoriasis, Couperose and Rosacea - Mario Badescu Skin Care Which skin condition do you have? Do you have areas of red skin, perhaps some dry, itchy skin or even blisters or rash? There are several skin conditions—Eczema and Psoriasis as well as Rosacea and Couperose—which share a number of characteristics and which are, in some cases, indistinguishable from each other. The two most closely related skin conditions are Psoriasis and Eczema. Let’s start by looking at the differences between Eczema and Psoriasis.

My 'Naked' Truth  Naked, I stood at the closet doors with the lights on and made myself ready. I took a deep breath and positioned the mirrors so I could see all of me. I consciously worked to remove my self-believed inner image. I opened my eyes and looked very carefully at my body. And my heart lurched at the truth: I am not a young woman anymore. I am a woman well-lived. Child health problems 'linked to father's age' 26 February 2014Last updated at 21:59 ET By James Gallagher Health and science reporter, BBC News A wide range of disorders and problems in school-age children have been linked to delayed fatherhood in a major study involving millions of people. Increased rates of autism, attention deficit hyperactivity disorder (ADHD), bipolar disorder, schizophrenia, suicide attempts and substance abuse problems were all reported. The study, in JAMA Psychiatry, suggests mutated sperm were to blame. However, experts say the benefits older dads bring may outweigh any problems. The investigation by Indiana University, in the US, and Sweden's Karolinska Institute has been described as the largest and one of the best designed studies on the issue.

Related: