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Botulism is a rare but serious illness. The cause is a toxin (poison) made by a bacterium called Clostridium botulinum. It occurs naturally in soil.There are several kinds of botulism. Foodborne botulism comes from eating foods contaminated with the ...

Botulism is a rare but serious illness. The cause ...

Also called: Acquired immunodeficiency syndrome, HIV, Human immunodeficiency virus HIV stands for human immunodeficiency virus. It kills or damages the body's immune system cells. AIDS stands for acquired immunodeficiency syndrome. It is the most adv...

Also called: Acquired immunodeficiency syndrome, H...

Bronchitis is an inflammation of the bronchial tubes, the airways that carry air to your lungs. It causes a cough that often brings up mucus, as well as shortness of breath, wheezing, and chest tightness. There are two main types of bronchitis: acute...

Bronchitis is an inflammation of the bronchial tub...

Like other parts of the body, bones can get infected. The infections are usually bacterial, but can also be fungal. They may spread to the bone from nearby skin or muscles, or from another part of the body through the bloodstream. People who are at r...

Like other parts of the body, bones can get infect...

Cellulitis is an infection of the skin and deep underlying tissues. Group A strep (streptococcal) bacteria are the most common cause. The bacteria enter your body when you get an injury such as a bruise, burn, surgical cut, or wound.Symptoms include:...

Cellulitis is an infection of the skin and deep un...

Sneezing, sore throat, a stuffy nose, coughing - everyone knows the symptoms of the common cold. It is probably the most common illness. In the course of a year, people in the United States suffer 1 billion colds.You can get a cold by touching your e...

Sneezing, sore throat, a stuffy nose, coughing - e...

Also called: Septic arthritis Most kinds of arthritis cause pain and swelling in your joints. Joints are places where two bones meet, such as your elbow or knee. Infectious arthritis is an infection in the joint. The infection comes from a bacterial,...

Also called: Septic arthritis Most kinds of arthri...

Also called: Communicable diseases Infectious diseases kill more people worldwide than any other single cause. Infectious diseases are caused by germs. Germs are tiny living things that are found everywhere - in air, soil and water. You can get infec...

Also called: Communicable diseases Infectious dise...

Also called: Listeriosis Listeriosis is a foodborne illness caused by Listeria monocytogenes, bacteria found in soil and water. It can be in a variety of raw foods as well as in processed foods and foods made from unpasteurized milk. Listeria is unli...

Also called: Listeriosis Listeriosis is a foodborn...

Also called: Bronchopneumonia Pneumonia is an infection in one or both of the lungs. Many germs, such as bacteria, viruses, and fungi, can cause pneumonia. You can also get pneumonia by inhaling a liquid or chemical. People most at risk are older tha...

Also called: Bronchopneumonia Pneumonia is an infe...

Bacteria are living things that have only one cell. Under a microscope, they look like balls, rods, or spirals. They are so small that a line of 1,000 could fit across a pencil eraser. Most bacteria won't hurt you - less than 1 percent of the differe...

Bacteria are living things that have only one cell...

Also called: Stomach flu Have you ever had the "stomach flu?" What you probably had was gastroenteritis - not a type of flu at all. Gastroenteritis is an inflammation of the lining of the intestines caused by a virus, bacteria or parasites. Viral gas...

Also called: Stomach flu Have you ever had the "st...

Also called: Sexually transmitted infections, STDs, Venereal disease Sexually transmitted diseases (STDs) are infections that you can get from having sex with someone who has the infection. The causes of STDs are bacteria, parasites and viruses. Ther...

Also called: Sexually transmitted infections, STDs...

Also called: Zoonoses Animal diseases that people can catch are called zoonoses. Many diseases affecting humans can be traced to animals or animal products. You can get a disease directly from an animal, or indirectly, through the environment.Farm an...

Also called: Zoonoses Animal diseases that people ...

Also called: Pertussis Whooping cough is an infectious bacterial disease that causes uncontrollable coughing. The name comes from the noise you make when you take a breath after you cough. You may have choking spells or may cough so hard that you vom...

Also called: Pertussis Whooping cough is an infect...

Also called: WNV West Nile virus (WNV) is an infectious disease that first appeared in the United States in 1999. Infected mosquitoes spread the virus that causes it. People who get WNV usually have no symptoms or mild symptoms. The symptoms include ...

Also called: WNV West Nile virus (WNV) is an infec...

Also called: Coccidioidomycosis Valley Fever is a disease caused by a fungus (or mold) called Coccidioides. The fungi live in the soil of dry areas like the southwestern U.S. Anyone exposed to the fungus can get the infection. The highest risk is for...

Also called: Coccidioidomycosis Valley Fever is a ...

Sinusitis means your sinuses are infected or inflamed. Your sinuses are hollow air spaces within the bones surrounding the nose. They produce mucus, which drains into the nose. If your nose is swollen, this can block the sinuses and cause pain and in...

Sinusitis means your sinuses are infected or infla...

Also called: Pyrexia A fever is a body temperature that is higher than normal. It is not an illness. It is part of your body's defense against infection. Most bacteria and viruses that cause infections do well at the body's normal temperature (98.6 F...

Also called: Pyrexia A fever is a body temperature...

Also called: Norwalk virus infections Noroviruses are a group of related viruses. Infection with these viruses causes an illness called gastroenteritis, an inflammation of the stomach and intestines. It can spread from person to person, or through co...

Also called: Norwalk virus infections Noroviruses ...

Also called: Candidiasis, Moniliasis Candida is the scientific name for yeast. It is a fungus that lives almost everywhere, including in your body. Usually, your immune system keeps yeast under control. If you are sick or taking antibiotics, it can m...

Also called: Candidiasis, Moniliasis Candida is th...