MedlinePlus descriptions of most diseases

NIAID is the lead Institute at the National Institutes of Health conducting research on food allergy, a condition that affects approximately 5 percent of children and 4 percent of adults in the United States. In a person with a food allergy, the immune system reacts abnormally to a component of a food—sometimes producing a life-threatening response. Mayo Clinic’s highly specialized heart experts diagnose and treat more than 200 heart conditions, including many rare and complex disorders, providing the most appropriate care for you. To learn more about your new benefits, your welcome packet, and what to do if you have an urgent health care issue please visit the New to Oregon Health Plan​web page​.

Viruses are the most common cause of hepatitis, but the diseases and conditions can also be caused by other infections, heavy alcohol use, toxins, certain medications, and autoimmune disease. There are five main virus types that cause hepatitis—type A, B, C, D, and E. Dengue fever is an infectious disease carried by mosquitoes and caused by any of four related dengue viruses. This disease used to be called “break-bone” fever because it sometimes causes severe joint and muscle pain that feels like bones are breaking. Health experts have known about dengue fever for more than 200 years.

It is especially dangerous for people who are very young or old or who have other conditions such as heart disease or asthma. Some diseases, such as most forms of cancer, heart disease, and mental disorders, are non-infectious diseases. Many non-infectious diseases have a partly or completely genetic basis and may thus be transmitted from one generation to another.

They are spread through direct contact with the bodily fluids of a sick person and can cause fever, headache, muscle pain, weakness, fatigue, diarrhea, vomiting, stomach pain, and hemorrhage. Cholera is an acute, diarrheal illness caused by infection of the intestine with the bacterium Vibrio cholera. An estimated 3-5 million cases and over 100,000 deaths occur each year around the world. The infection is often mild or without symptoms, but can sometimes be severe.

The medicines available today have taken an average of 12 years to develop. With dedication, creativity, and science, we can significantly decrease that time. Revolutionary medicines have the power to enrich and extend life across many disease areas. Whether treating the most common or the rarest cancers, our experienced experts work together to provide exactly the care you need.

Disease burden is the impact of a health problem in an area measured by financial cost, mortality, morbidity, or other indicators. In studying diseases, epidemiology faces the challenge of defining them. Especially for poorly understood diseases, different groups might use significantly different definitions. Without an agreed-on definition, different researchers may report different numbers of cases and characteristics of the disease. Treatment for medical emergencies must be provided promptly, often through an emergency department or, in less critical situations, through an urgent care facility. Alternatively, diseases may be classified according to the organ system involved, though this is often complicated since many diseases affect more than one organ.

Find relevant and reliable medical information on diseases and conditions. Find your medical topic by using the comprehensive A-Z list above, click on the browse health centers below, or one of our categorized listings of health and medical conditions. Escherichia coli (E. coli) bacteria live in the intestines of people and animals and are key to a healthy intestinal tract. Coli strains are harmless, but some can cause diarrhea through contact with contaminated food or water while other strains can cause urinary tract infections, respiratory illness, and pneumonia. We use the latest interactive tools, graphics, live webinars and events, interviews, medical imagery, and more. ​Information about getting immunized, school requirements, resources for health care providers, and immunization data for Oregon.

Health Topics, MedlinePlus descriptions of most diseases, with access to current research articles. An illness narrative is a way of organizing a medical experience into a coherent story that illustrates the sick individual’s personal experience. A condition may be considered a disease in some cultures or eras but not in others.

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