Dr. John C. Chalfant M.D.

Pertussis is an infection of the upper respiratory system. The disease is highly contagious and spreads through the coughing and sneezing of an infected individual. This highly contagious and airborne disease is caused by the bacteria called Bordetella pertussis. The symptoms of pertussis typically...

Our human bodies are a complex network of nerves, blood vessels, muscles, and visceral organs. While our skin is the outermost layer holding everything together, on the inside, it is a network of strong muscle fibers that hold all our internal organs in place. A hernia occurs when there is a weak...

What is biotin?Biotin is a water-soluble vitamin also known as vitamin B7. This vitamin is critical for an organism's growth and development. It also serves as a coenzyme of carboxylase enzymes and is involved in the metabolism of carbohydrates, fatty acids, and amino acids. Biotin is required to...

What is strep throat?Strep throat is the most common form of bacterial infection of the throat and tonsils, resulting in inflammation and irritation. Strep throat is caused by different types of streptococcus bacteria. The severity of the condition differs from one type of bacteria to another. Not...

What is excessive sweating?Excessive sweating is also known as hyperhidrosis. Abnormal and excessive sweating is not necessarily related to a rise in body temperature or intensive exercises. In this condition, sweating is so excessive that it tends to soak the clothes of an individual. At times,...

Hormone therapy is often used to relieve menopausal symptoms. However, since estrogen plays a crucial role in maintaining bone health, hormone therapy is another treatment option for osteoporosis.How does hormone therapy work?Following menopause, your body produces less estrogen and progesterone...