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Group B Strep: A Dangerous Infection in Infants and Adults

Despite advances in treatment and prevention, Group B strep continues to be the leading cause of dangerous infections in newborns, pregnant mothers and adults.   An estimated 10% – 30% of pregnant women in the U.S. carry Group B streptococcus (GBS), bacteria that live in the intestine, vagina and rectum, and usually show no symptoms. During childbirth, however, the situation can change. Colonized mothers can pass GBS via amniotic or vaginal fluids to their babies causing infections which may...

Flashback: The First ECG

p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times} p.p2 {margin: 5.0px 0.0px 5.0px 0.0px; font: 12.0px Times} p.p3 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Times; min-height: 14.0px} span.s1 {font: 12.0px 'Times New Roman'} Willem Einthoven found the beat and built a machine that could measure the electrical current a heart creates. It weighed 600 pounds. An electrocardiogram — called informally an ECG or EKG — measures the small electric waves that a human heart creates. It’s...

The Great Migration: Tracking Immune Cells’ Travels

Scientists are studying how immune cells move to develop better treatments for autoimmune diseases. Birds migrate. People migrate. And so do cells. T-cells squeezing between collagen fibers. PLOS ONE/Coles JA Our immune cells, in particular, are always on the move, constantly patrolling the body for foreign invaders. If an unwelcome visitor enters through the nose, mouth or eyes, or there’s a break in the skin, these nimble soldiers are ready to flood the attack site and send out signals...

advancing-medical-research

Fixing Broken Body Clocks

By finding ways to restore sleep rhythms, researchers can benefit Alzheimer’s patients and others.  Every living being from fungi to frogs has an internal clock that normally runs on a 24-hour cycle.  In humans, this master clock resides in a tiny region of the brain’s hypothalamus and controls everything from hunger and sleep patterns to daily hormone fluctuations and body temperature. The brain’s master clock sets the tempo for the rhythms of every cell throughout the whole body. “It’s like...

Consumer DNA Kits Give Research a Boost

At-home DNA tests are driving patient participation in research. DNA kits can trace more than your ancestry. They’re also helping medical research. Patients with lupus and inflammatory bowel disease (IBD) recently became a pivotal part of studies without ever stepping foot in a clinic or hospital, thanks to a collaboration formed between Pfizer and the genetic testing company 23andMe. The mission: find genetic clues that may someday lead to more precise treatments. The method: mail in saliva...

6 Views of a Neuron by Golgi and Cajal

Two groundbreaking scientists stain cells, uncover the intricate secrets of the nervous system, and elevate scientific discovery to fine art.   In 1872, Camillo Golgi accepted a job as the chief medical officer at the Hospital for the Chronically Sick at Abbiategrasso, Italy. It is here — ensconced in a tiny kitchen he had converted into a makeshift laboratory — that he created what he would call the “black reaction.” It was a method of staining that was able to capture even the most delicate...

Female Pioneers: Meet the Biochemist Who Tackled One of TB’s Great Mysteries

Florence Seibert was an early pioneer in applying physical chemistry techniques to biomedical problems. American Florence Seibert developed a reliable test for TB, which has helped saved millions of lives. In the early 1900s, tuberculosis, a bacteria that settles in the lungs and eats them away, continued to be among the deadliest diseases, killing one in seven people in the U.S. and Europe. Before the turn of the century, German scientist Robert Koch had discovered tuberculin, which is...

Smallpox Vanquished

Once one of the world’s deadliest diseases, smallpox’s complete eradication was the result of a worldwide deployment of a vaccine begun 50 years ago. To date it’s still the only human disease ever to disappear from Earth. Considered one of the greatest achievements of the 20th century, alongside the likes of getting a man on the moon, and one of the greatest medical feats in all of human history, smallpox was officially declared eradicated from the planet in 1980. The big push for its...

Checking Our Gut Microorganisms’ Disease-Fighting Might

New gene sequencing tech is helping researchers harness the bacteria, viruses, and fungi that live in our bodies to fight disease. At this very moment, trillions of bacteria and other germs are swimming in your gut and crawling on your skin. While the thought may make you cringe, these microscopic squatters — collectively known as the human microbiome — are essential to our survival. And now a growing body of research shows how this microbiome could point the way to new treatments and a deeper...

foundations-science

Hungry, Hungry Macrophages (video)

Macrophages, the human immune system’s horde of cells that clear the body’s detritus by eating it, may be induced to gorge — in the name of helping combat Alzheimer’s and other diseases. Macrophages have an appetite for destruction. (Their name means “big eater” in Greek.) As the immune system’s primary phagocyte — or cell that has the astounding ability to engulf and digest another particle — macrophages are, among other things, the human body’s primary cleanup system. They exist in every...

Immunity’s Double-Edged Sword

Human’s complex immune system is the vanquisher of pathogens, but it can also turn on itself. In a stroke of “evolutionary brilliance,” according to Pfizer immunologist Aaron Winkler, humans and other higher organisms developed specialized immune systems that protect us from the vast diversity of pathogens found in nature, from flu viruses to pinworms. Through random genetic variation, our bodies constantly generate millions of new white blood cells, the foot soldiers of the immune system, each...

Diagnosing Disease by Voice

Detecting the occurrence of many diseases can be challenging without a blood test or other reliable screening tool. So researchers are now listening for the sounds of disease. Speech is a complex process that requires coordination with our brain, muscles, and respiratory system. Recent research shows that subtle changes in speech, for example slurring or vocal cord tremors, may be early signs of disease or illness like Parkinson’s disease, depression, cardiac problems, and concussion. People...