The tuberculosis skin test is based on the fact that infection with M. tuberculosis produces a delayed-type hypersensitivity skin reaction to certain components of the bacterium. The standard recommended tuberculin test is administered by injecting 0.1mL of 5 TU (tuberculin units) PPD into the top layers of skin of the forearm. "Reading" the skin test means detecting a raised, thickened local area of skin reaction, referred to as induration. The area of induration (palpable, raised, hardened area) around the site of injection is the reaction to tuberculin.
Though the Oxford English Dictionary traces wellness (meaning the opposite of illness) to the 1650s, the story of the wellness movement really begins in the 1950s. New approaches to healthful living were emerging then, inspired in part by the preamble to the World Health Organization’s 1948 constitution: “Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.” Halbert L. Dunn, chief of the National Office of Vital Statistics, was looking for new terminology to convey the positive aspects of health that people could achieve, beyond simply avoiding sickness. In a series of papers and lectures in the late ’50s, Dunn sketched out his concept of “high-level wellness,” defined as “an integrated method of functioning, which is oriented toward maximizing the potential of which the individual is capable.”
Interestingly, research suggests anxiety may be tied to type 2 diabetes risk. According to a September 2016 study published in the journal Psychoneuroendocrinology, which measured levels of blood glucose and IL-6, a protein in the body that stimulates immune response and healing, found that people with with low inhibition — or attention control — were more likely to have type 2 diabetes.
“The cell is the original smart machine,” notes Crystal Nyitray, PhD, on the website of Encellin, the biotech start-up she founded in 2016. “All drugs, devices, and even digital health approaches are trying to restore or copy these functions. At Encellin, we believe in the human cell and creating a safe and reliable solution for patients. We are creating a technology to promote cell function and protection.”
Nerve damage from diabetes is called diabetic neuropathy and is also caused by disease of small blood vessels. In essence, the blood flow to the nerves is limited, leaving the nerves without blood flow, and they get damaged or die as a result (a term known as ischemia). Symptoms of diabetic nerve damage include numbness, burning, and aching of the feet and lower extremities. When the nerve disease causes a complete loss of sensation in the feet, patients may not be aware of injuries to the feet, and fail to properly protect them. Shoes or other protection should be worn as much as possible. Seemingly minor skin injuries should be attended to promptly to avoid serious infections. Because of poor blood circulation, diabetic foot injuries may not heal. Sometimes, minor foot injuries can lead to serious infection, ulcers, and even gangrene, necessitating surgical amputation of toes, feet, and other infected parts.
In the US, 84.1 million adults—more than 1 in 3—have prediabetes, and 90% of them don’t know they have it. Prediabetes is a serious health condition where blood sugar levels are higher than normal, but not high enough yet to be diagnosed as diabetes. Prediabetes increases your risk for type 2 diabetes, heart disease, and stroke. But through the CDC-led National Diabetes Prevention Program, you can learn practical, real-life changes that can cut your risk for developing type 2 diabetes by as much as 58% (71% if you’re 60 or older).
Acute pain is a lifesaver. Without it, we would have to watch out all the time to keep from injuring or killing ourselves accidentally. This is why people with diabetes are advised to check their feet visually or manually every day: If a person has peripheral neuropathy, particularly if it causes numbness in his feet, the acute pain nerves in his feet may not be working, and if they aren’t, they can’t warn him about injuries or other, normally painful foot problems.
When there is excess glucose present in the blood, as with type 2 diabetes, the kidneys react by flushing it out of the blood and into the urine. This results in more urine production and the need to urinate more frequently, as well as an increased risk of urinary tract infections (UTIs) in men and women. People with type 2 diabetes are twice as likely to get a UTI as people without the disease, and the risk is higher in women than in men.
For a wellness festival, there was an unexpected amount of talk about the importance of suffering and pain. In one panel about addiction, the ultramarathoner Charlie Engle, who ran 30 marathons in his first three years of sobriety, told the story of his first son being born. “He was gonna save me,” Engle recalled, “and then six days later, after a crack binge, the police are searching my car, and I had to choose between living and dying. And I chose running ... I wanted to pound that part of me out and never visit it again.”