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Trinucleotide Repeats: Fragile X Syndrome What are trinucleotide repeats? DNA is the chemical that makes up your genes. It contains a "code" of 3-letter words known as codons or trinucleotides. Many genes normally contain trinucleotide sequences that repeat. These are called

Allergens: Pollen What is pollen? Pollen is the tiny egg-shaped male cells of plants, including trees, grasses, and weeds. Pollen is microscopic in size. It is the most common cause of hay fever (seasonal allergic rhinitis). Which plants produce pollen that cause allergic

Common Liver Tests What are some common liver tests? A series of blood tests can often find out if the liver is inflamed, injured, or working normally. The pattern of abnormalities can point to hepatitis (infection or inflammation of the liver) versus cholestasis (problems with

Oral Health and Dental Specialists What is a general dentist (DDS or DMD)? To become a general dentist, a person must graduate from dental school and have either a DDS or a DMD degree: DDS. Doctor of dental surgery DMD. Doctor of dental medicine There is no difference between the

Antibiotics What are antibiotics? Antibiotics are powerful medicines used to treat certain bacterial infections. Antibiotics don't cure all infections. And antibiotics that are used when not needed can be harmful. There are two main types of germs that cause most infections

Overview of Kidney Disorders How do the kidneys work? The body takes nutrients from food and converts them to energy. After the body has used all the food components that it needs, waste products are left behind in the bowel and in the blood. The kidneys and urinary system help

Arthritis Diagnosis Diagnosing arthritis may be difficult. There are more than 100 different types of arthritis. Many symptoms are similar among the different conditions affecting the joints. Arthritis may be generally categorized into the following groups: degenerative arthritis

Refractive Errors in Children What is normal vision? To understand how certain problems can affect your child's vision, it’s important to know how normal vision happens. For children with normal vision, the following things occur in this order: Light enters the eye through the

Fire Safety and Burns Overview A burn injury usually results from an energy transfer from a heat source to the body. There are many types of burns, including: Thermal burns. These burns are caused by heat sources that raise the temperature of the skin and tissues and cause tissue