What are ticks? What are bedbugs? Share Your Story Tick bites can transmit disease. Ticks are arthropods (tick members are mainly hard [Ixodidae] or soft [Argasidae] ticks) that are obligate blood suckers that can, through bites, transmit diseases to humans and many animals. Bedbugs (Cimex genus only) are insects that are blood-sucking parasites of some …

What are steroids? Readers Comments 5 Share Your Story A syringe and an assortment of steroid pills; photo by iStock Steroids (short for corticosteroids) are synthetic drugs that closely resemble cortisol, a hormone that your body produces naturally. Steroids work by decreasing inflammation and reducing the activity of the immune system. They are used to treat a variety of inflammatory …

Roseola facts Picture of the roseola rash; SOURCE: Fitzpatrick's Dermatology in General Medicine. Klaus Wolff, Lowell A. Goldsmith, Stephen I. Katz, Barbara A. Gilchrest, Amy S. Paller, David J. Leffell. Seventh Edition. Copyright 2008, 2005, 2001, 1997, 1993 by The McGraw-Hill Companies. All rights reserved. Roseola is a mild viral illness most commonly of young children. Roseola is a common …

Whooping cough (pertussis) facts Is Whooping Cough Highly Contagious? Whooping cough (pertussis) is an acute, highly contagious bacterial infection. The bacterium Bordetella pertussis causes this respiratory infection. Whooping cough commonly affects infants and young children, but immunization with the pertussis vaccine can prevent the infection. Young infants are at greatest risk for complications and even death from this respiratory disease. …

Tetanus facts Picture of Clostridium tetani, with spore formation (oval forms at end of rods). Source: CDC/Dr. Holdeman Tetanus is frequently a fatal infectious disease. Tetanus is caused by a type of bacteria (Clostridium tetani). The tetanus bacteria often enter the body through a puncture wound, which can be caused by nails, splinters, insect bites, burns, any skin break, and …

Heat-related illness (hyperthermia) definition and facts What Are the Signs and Symptoms of Dehydration? Hyperthermia is overheating of the body. Heat-related illness occurs as a result of heat exposure. Heat-related illnesses include heat stroke, heat exhaustion, heat cramps, heat syncope (fainting), and heat rash. Heat stroke is the most severe form of heat-related illness, and requires immediate medical attention. Certain …

What is MS (multiple sclerosis)? Share Your Story Over half of people with MS experience some kind of short- or long-term pain. Multiple sclerosis (MS) is a disease that causes demyelination, or disruption of the substance that coats and protects nerve cells, in the spinal nerve and brain cells. The specific symptoms and severity of the disease are related to …

What is levodopa-carbidopa, and how does it work (mechanism of action)? Carbidopa-levodopa is a combination of two drugs, levodopa and carbidopa. Carbidopa-levodopa is used in the treatment of Parkinson’s disease. Parkinson’s disease is believed to be caused by low levels of dopamine in certain parts of the brain. When levodopa is taken orally, it crosses into the brain through the …

What is ringworm? What is eczema? Share Your Story Ringworm and eczema both cause itchiness. Ringworm is a common fungal infection of the skin (ringworm is also termed tinea or dermatophytosis), and the different types of ringworm are named for the location of the rash on the body (for example, tinea corporis [arm and/or leg], scalp [tinea capitis]). These infections …

What is osteoarthritis (OA)? Share Your Story Osteoarthritis and rheumatoid arthritis are both chronic joint disorders that cause joint pain. Osteoarthritis (OA) is a chronic joint disorder featuring degeneration and inflammation of cartilage of one or many joints. What is rheumatoid arthritis (RA)? Rheumatoid arthritis (RA) is a chronic autoimmune joint disorder characterized by inflammation of the tissue (synovium) that …